Proceedings of the Canadian Engineering Education Association (CEEA)
This paper addresses the construction of a novel approach to enhance learner motivation as it rel... more This paper addresses the construction of a novel approach to enhance learner motivation as it relates to the learning process. The foundational principles of motivation are discussed. The impact of instructional technology on student motivation through an innovative web-based problem-solving system is the main focus of this study. The development of the web-based problem-solving system and its evaluation process are considered for addressing the foundational principles of motivation. The proposed system is customizable to provide feedback to both students and instructors. The outcome of this research will help establish a suitable instructional design model of motivation for engineering students. The process also has prospects for applications in other disciplines.
Journal of Civil Engineering, Science and Technology
This paper describe the experimental performance of Profiled Steel Sheet Dry Board system (PSSDB)... more This paper describe the experimental performance of Profiled Steel Sheet Dry Board system (PSSDB) against out-of plane bending and vibration. The PSSDB panel consists of plywood attached to the top surface of profiled steel sheet by self-drilling and self-tapping screws. Profiled steel sheet dry board panel has been used successfully as flooring system in few construction projects within Malaysia. As a lightweight flooring system, human induced vibration is becoming increasingly vital serviceability and safety issues for such panel when it is covering relatively longer span or area. Therefore, it is important to evaluate the factors affecting the structural performance and also to consider the effects of vibration in building such flooring system. This paper will focus on theoretical and experimental procedures to determine the overall performance of PSSDB system due to flexural bending and vibration. Each parameter that effect the perfonnance of PSSDB system against vibration and f...
This study presents the results of immediate and long-term deflections of reinforced concrete bea... more This study presents the results of immediate and long-term deflections of reinforced concrete beams strengthened with carbon fiber reinforced polymer (CFRP) laminates under sustained loading The test parameters were sustained load and different degrees of strengthening scheme for both cracked and un-cracked sections of beams. The applied sustained load was 56% and 38% of the ultimate static capacities of the un-strengthened beams for cracked and un-cracked section respectively. The long term deflections of CFRP strengthened beams at six month were on average 1.42 times the immediate deflections for un-cracked beams and 1.45 times the immediate deflections for cracked beams. The experimental results indicate that the long-term deflection of cracked beam shows significantly higher value compared to that of un-cracked beams. A comparison of time dependent deformation between analytical and experimental results shows closer agreement for the un-cracked beam sections. More conservative theoretical estimation is observed in the case of cracked beam section in spite the inclusion of tension stiffening effect. Finally, factors affecting the long-term deflection of strengthened beams are discussed to get better understanding on the long term behaviour of strengthened beams.
The use of Fiber Reinforced Polymer (FRP) is becoming a widely accepted solution for repairing an... more The use of Fiber Reinforced Polymer (FRP) is becoming a widely accepted solution for repairing and strengthening ageing in the field of civil engineering around the world. In the present paper, experimental study designed to investigate the flexural behavior of reinforced concrete beams strengthened with CFRP laminates attached to the bottom of the beams by epoxy adhesive subjected to transverse loading. A total of five beams having different CFRP laminates configurations were tested to failure in four-point bending over a clear span 1900mm. Four beams were strengthened by changing the levels of CFRP laminates whereas the last one was not strengthened with FRP and considered as a control beam. Test results showed that the addition of CFRP sheets to the tension surface of the beams demonstrated significantly improvement in stiffness and ultimate capacity of beams. The response of control and strengthened beams were compared and efficiency and effectiveness of different CFRP configura...
This paper describes the application of various types of dry boards that are normally used as non... more This paper describes the application of various types of dry boards that are normally used as non-load bearing building components, as a structural component in an innovative lightweight composite structural flooring panel system known as the Bondek II/Cemboard Composite Flooring Panel (BCCFP) system. The composite panel system consists of profiled steel sheeting attached to a top layer dry board by simple mechanical connectors. In the proposed system, dry board plays a dual role, firstly in providing a flat floor surface ...
ABSTRACT This paper evaluates the possibility of replacing minimum shear reinforcement by steel f... more ABSTRACT This paper evaluates the possibility of replacing minimum shear reinforcement by steel fibers in both prestressed and non-prestressed thick concrete slab. Due to brittle behavior of plain concrete in tension, shear failure of thick slab is generally catastrophic. The use of minimum shear reinforcement is recommended in many instances to avoid such failure. This paper presents an alternative solution realising that the use of optimum steel fibers can give ductility performance equivalent to the slab with minimum shear reinforcement. To evaluate the effect of steel fibers on shear performance, eight full-scale tests are carried out. The influence of fibers on shear performance is evaluated and its potential to replace the minimum transverse steel of thick slab is discussed. Finally a procedure for predicting the shear capacity of such slab is presented.
Abstract In this paper, experimental study is carried out to evaluate the flexural performance of... more Abstract In this paper, experimental study is carried out to evaluate the flexural performance of reinforced concrete beams strengthened with different ratios of carbon fibre reinforced polymer (CFRP) laminates. Four rectangular reinforced concrete beams strengthened with different reinforcement ratios of CFRP laminates are tested to failure under transverse bending on a simply supported span of 1.9 m. The increase of ultimate strength provided by the bonded carbon fiber is assessed and failure mode is identified. The results indicated ...
Abstract This study presents the results of immediate and long-term deflections of reinforced con... more Abstract This study presents the results of immediate and long-term deflections of reinforced concrete beams strengthened with carbon fiber reinforced polymer (CFRP) laminates under sustained loading The test parameters were sustained load and different degrees of strengthening scheme for both cracked and un-cracked sections of beams. The applied sustained load was 56% and 38% of the ultimate static capacities of the un-strengthened beams for cracked and un-cracked section respectively. The long term deflections of ...
Folded plate structures constructed with profiled steel sheeting connected to dry boards by self ... more Folded plate structures constructed with profiled steel sheeting connected to dry boards by self drilling, self tapping screws (known as the PSSDB system) are being proposed as an alternative to traditional forms of roof construction. This paper describes the analysis, testing, and the structural behaviour of such kind of structures. The proposed efficient and load bearing structural system consists of an assembly of individual PSSDB panels connected by steel angle plates at the ridges, formed to the required shape, width and span. An ...
Résumé/Abstract Profiled Steel Sheet Dry Board (PSSDB) composite panel has been proven to be an e... more Résumé/Abstract Profiled Steel Sheet Dry Board (PSSDB) composite panel has been proven to be an effective structural system and can be exploited for a variety of structural purposes. As a flooring system, the PSSDB floor carries the out of plane bending and shear mainly in the direction of corrugation of profiled steel sheeting. For such flooring system, human induced vibrations are becoming increasingly vital serviceability and safety issues. In this paper, investigations are carried out on the vibration performances of the PSSDB floor ...
Journal of Reinforced Plastics and Composites, 2011
Abstract This article presents the results and discussions of experimental and analytical work on... more Abstract This article presents the results and discussions of experimental and analytical work on CFRP-strengthened RC beams investigating the cracking and deflection performance. The aim of this study is to evaluate the time-dependent behavior by different degrees of strengthening scheme and two types of sustained loads. Eight RC beams were cast and tested under sustained loads for cracked and uncracked section. An analytical method based on EMM is developed to predict the time-dependent behavior of CFRP ...
Externally bonded carbon fiber reinforced polymer (CFRP) sheet has shown excellent performance to... more Externally bonded carbon fiber reinforced polymer (CFRP) sheet has shown excellent performance to repair, restore and increase the load-carrying capacity of RC structures. In this paper results of an experimental test are presented in which fourteen RC beams strengthened with CFRP epoxy bonded sheets in flexure and time-dependent tests are subjected to four-point bending and sustained load respectively. The test variables included different degrees of strengthening scheme and two types of sustained load for both un- ...
This paper describes the application of various types of dry boards that are normally used as non... more This paper describes the application of various types of dry boards that are normally used as non-load bearing building components, as a structural component in an innovative lightweight composite structural flooring panel system known as the Bondek II/Cemboard Composite Flooring Panel (BCCFP) system. The composite panel system consists of profiled steel sheeting attached to a top layer dry board by simple mechanical connectors. In the proposed system, dry board plays a dual role, firstly in providing a flat floor surface ...
Folded plate structures constructed from profiled steel sheeting connected to dry boards by self ... more Folded plate structures constructed from profiled steel sheeting connected to dry boards by self drilling, self tapping screws (known as profiled steel sheeting dry board (PSSDB) system) are being proposed as an alternative to traditional forms of roof construction. The proposed load bearing composite structural system consists of an assembly of individual PSSDB panels connected by steel angle plates at the ridges, formed to the required shape, width and span. This kind of structure has a significant advantage of removing the internal ...
In this paper, the peeling and spalling resistance of unidirectional fiber reinforced polymer (FR... more In this paper, the peeling and spalling resistance of unidirectional fiber reinforced polymer (FRP) sheets externally bonded to concrete surface are investigated experimentally through a series of peeling tests. A peeling load is applied on the FRP sheet by a circular rod placed into the central notch of the beam. The effects of different FRP composites, adhesives, surface treatments and strength of concrete on peeling behavior are investigated. Three different modes of debonding failure are identified: debonding within concrete surface, ...
Abstract: This paper summarizes the results of experimental and analytical studies concerning the... more Abstract: This paper summarizes the results of experimental and analytical studies concerning the flexural strengthening of reinforced concrete beams by the external bonding of high-strength, lightweight fiber reinforced plastic (FRP) plates to the tension face of the ...
Structural Engineering and Mechanics, Oct 10, 2011
The strengthening and rehabilitation of reinforced concrete structures with externally bonded car... more The strengthening and rehabilitation of reinforced concrete structures with externally bonded carbon fibre reinforced polymer(FRP) laminates has shown excellent performance and, as a result, this technology is rapidly replacing steel plate bonding techniques. This paper addresses this issue, and presents results deals with the influence of external bonded CFRP-reinforcement on the time-dependent behavior of reinforced concrete beams. A total of eight reinforced concrete beams with cracked and un-cracked section, with and without ...
Kertas kerja ini menghuraikan suatu kajian ujikaji mengenai kelakuan lenturan keluar satah bagi p... more Kertas kerja ini menghuraikan suatu kajian ujikaji mengenai kelakuan lenturan keluar satah bagi panel-panel lantai komposit yang baru diperkenalkan, dinamakan'Panel Kepingan Keluli Berprofil Papan Kering (PSSDB)'. Panel-panel tersebut dibentuk dengan melekatkan lapisan papan kering kepada kepingan keluli berprofil menggunakan penyambung-penyambung mekanikal. Ianya sangat ringan, dengan demikian mudah dialih, dan boleh didirikan dengan cepat oleh tenaga kerja separuh mahir. Satu siri ujikaji keluar ...
Proceedings of the Canadian Engineering Education Association (CEEA)
This paper addresses the construction of a novel approach to enhance learner motivation as it rel... more This paper addresses the construction of a novel approach to enhance learner motivation as it relates to the learning process. The foundational principles of motivation are discussed. The impact of instructional technology on student motivation through an innovative web-based problem-solving system is the main focus of this study. The development of the web-based problem-solving system and its evaluation process are considered for addressing the foundational principles of motivation. The proposed system is customizable to provide feedback to both students and instructors. The outcome of this research will help establish a suitable instructional design model of motivation for engineering students. The process also has prospects for applications in other disciplines.
Journal of Civil Engineering, Science and Technology
This paper describe the experimental performance of Profiled Steel Sheet Dry Board system (PSSDB)... more This paper describe the experimental performance of Profiled Steel Sheet Dry Board system (PSSDB) against out-of plane bending and vibration. The PSSDB panel consists of plywood attached to the top surface of profiled steel sheet by self-drilling and self-tapping screws. Profiled steel sheet dry board panel has been used successfully as flooring system in few construction projects within Malaysia. As a lightweight flooring system, human induced vibration is becoming increasingly vital serviceability and safety issues for such panel when it is covering relatively longer span or area. Therefore, it is important to evaluate the factors affecting the structural performance and also to consider the effects of vibration in building such flooring system. This paper will focus on theoretical and experimental procedures to determine the overall performance of PSSDB system due to flexural bending and vibration. Each parameter that effect the perfonnance of PSSDB system against vibration and f...
This study presents the results of immediate and long-term deflections of reinforced concrete bea... more This study presents the results of immediate and long-term deflections of reinforced concrete beams strengthened with carbon fiber reinforced polymer (CFRP) laminates under sustained loading The test parameters were sustained load and different degrees of strengthening scheme for both cracked and un-cracked sections of beams. The applied sustained load was 56% and 38% of the ultimate static capacities of the un-strengthened beams for cracked and un-cracked section respectively. The long term deflections of CFRP strengthened beams at six month were on average 1.42 times the immediate deflections for un-cracked beams and 1.45 times the immediate deflections for cracked beams. The experimental results indicate that the long-term deflection of cracked beam shows significantly higher value compared to that of un-cracked beams. A comparison of time dependent deformation between analytical and experimental results shows closer agreement for the un-cracked beam sections. More conservative theoretical estimation is observed in the case of cracked beam section in spite the inclusion of tension stiffening effect. Finally, factors affecting the long-term deflection of strengthened beams are discussed to get better understanding on the long term behaviour of strengthened beams.
The use of Fiber Reinforced Polymer (FRP) is becoming a widely accepted solution for repairing an... more The use of Fiber Reinforced Polymer (FRP) is becoming a widely accepted solution for repairing and strengthening ageing in the field of civil engineering around the world. In the present paper, experimental study designed to investigate the flexural behavior of reinforced concrete beams strengthened with CFRP laminates attached to the bottom of the beams by epoxy adhesive subjected to transverse loading. A total of five beams having different CFRP laminates configurations were tested to failure in four-point bending over a clear span 1900mm. Four beams were strengthened by changing the levels of CFRP laminates whereas the last one was not strengthened with FRP and considered as a control beam. Test results showed that the addition of CFRP sheets to the tension surface of the beams demonstrated significantly improvement in stiffness and ultimate capacity of beams. The response of control and strengthened beams were compared and efficiency and effectiveness of different CFRP configura...
This paper describes the application of various types of dry boards that are normally used as non... more This paper describes the application of various types of dry boards that are normally used as non-load bearing building components, as a structural component in an innovative lightweight composite structural flooring panel system known as the Bondek II/Cemboard Composite Flooring Panel (BCCFP) system. The composite panel system consists of profiled steel sheeting attached to a top layer dry board by simple mechanical connectors. In the proposed system, dry board plays a dual role, firstly in providing a flat floor surface ...
ABSTRACT This paper evaluates the possibility of replacing minimum shear reinforcement by steel f... more ABSTRACT This paper evaluates the possibility of replacing minimum shear reinforcement by steel fibers in both prestressed and non-prestressed thick concrete slab. Due to brittle behavior of plain concrete in tension, shear failure of thick slab is generally catastrophic. The use of minimum shear reinforcement is recommended in many instances to avoid such failure. This paper presents an alternative solution realising that the use of optimum steel fibers can give ductility performance equivalent to the slab with minimum shear reinforcement. To evaluate the effect of steel fibers on shear performance, eight full-scale tests are carried out. The influence of fibers on shear performance is evaluated and its potential to replace the minimum transverse steel of thick slab is discussed. Finally a procedure for predicting the shear capacity of such slab is presented.
Abstract In this paper, experimental study is carried out to evaluate the flexural performance of... more Abstract In this paper, experimental study is carried out to evaluate the flexural performance of reinforced concrete beams strengthened with different ratios of carbon fibre reinforced polymer (CFRP) laminates. Four rectangular reinforced concrete beams strengthened with different reinforcement ratios of CFRP laminates are tested to failure under transverse bending on a simply supported span of 1.9 m. The increase of ultimate strength provided by the bonded carbon fiber is assessed and failure mode is identified. The results indicated ...
Abstract This study presents the results of immediate and long-term deflections of reinforced con... more Abstract This study presents the results of immediate and long-term deflections of reinforced concrete beams strengthened with carbon fiber reinforced polymer (CFRP) laminates under sustained loading The test parameters were sustained load and different degrees of strengthening scheme for both cracked and un-cracked sections of beams. The applied sustained load was 56% and 38% of the ultimate static capacities of the un-strengthened beams for cracked and un-cracked section respectively. The long term deflections of ...
Folded plate structures constructed with profiled steel sheeting connected to dry boards by self ... more Folded plate structures constructed with profiled steel sheeting connected to dry boards by self drilling, self tapping screws (known as the PSSDB system) are being proposed as an alternative to traditional forms of roof construction. This paper describes the analysis, testing, and the structural behaviour of such kind of structures. The proposed efficient and load bearing structural system consists of an assembly of individual PSSDB panels connected by steel angle plates at the ridges, formed to the required shape, width and span. An ...
Résumé/Abstract Profiled Steel Sheet Dry Board (PSSDB) composite panel has been proven to be an e... more Résumé/Abstract Profiled Steel Sheet Dry Board (PSSDB) composite panel has been proven to be an effective structural system and can be exploited for a variety of structural purposes. As a flooring system, the PSSDB floor carries the out of plane bending and shear mainly in the direction of corrugation of profiled steel sheeting. For such flooring system, human induced vibrations are becoming increasingly vital serviceability and safety issues. In this paper, investigations are carried out on the vibration performances of the PSSDB floor ...
Journal of Reinforced Plastics and Composites, 2011
Abstract This article presents the results and discussions of experimental and analytical work on... more Abstract This article presents the results and discussions of experimental and analytical work on CFRP-strengthened RC beams investigating the cracking and deflection performance. The aim of this study is to evaluate the time-dependent behavior by different degrees of strengthening scheme and two types of sustained loads. Eight RC beams were cast and tested under sustained loads for cracked and uncracked section. An analytical method based on EMM is developed to predict the time-dependent behavior of CFRP ...
Externally bonded carbon fiber reinforced polymer (CFRP) sheet has shown excellent performance to... more Externally bonded carbon fiber reinforced polymer (CFRP) sheet has shown excellent performance to repair, restore and increase the load-carrying capacity of RC structures. In this paper results of an experimental test are presented in which fourteen RC beams strengthened with CFRP epoxy bonded sheets in flexure and time-dependent tests are subjected to four-point bending and sustained load respectively. The test variables included different degrees of strengthening scheme and two types of sustained load for both un- ...
This paper describes the application of various types of dry boards that are normally used as non... more This paper describes the application of various types of dry boards that are normally used as non-load bearing building components, as a structural component in an innovative lightweight composite structural flooring panel system known as the Bondek II/Cemboard Composite Flooring Panel (BCCFP) system. The composite panel system consists of profiled steel sheeting attached to a top layer dry board by simple mechanical connectors. In the proposed system, dry board plays a dual role, firstly in providing a flat floor surface ...
Folded plate structures constructed from profiled steel sheeting connected to dry boards by self ... more Folded plate structures constructed from profiled steel sheeting connected to dry boards by self drilling, self tapping screws (known as profiled steel sheeting dry board (PSSDB) system) are being proposed as an alternative to traditional forms of roof construction. The proposed load bearing composite structural system consists of an assembly of individual PSSDB panels connected by steel angle plates at the ridges, formed to the required shape, width and span. This kind of structure has a significant advantage of removing the internal ...
In this paper, the peeling and spalling resistance of unidirectional fiber reinforced polymer (FR... more In this paper, the peeling and spalling resistance of unidirectional fiber reinforced polymer (FRP) sheets externally bonded to concrete surface are investigated experimentally through a series of peeling tests. A peeling load is applied on the FRP sheet by a circular rod placed into the central notch of the beam. The effects of different FRP composites, adhesives, surface treatments and strength of concrete on peeling behavior are investigated. Three different modes of debonding failure are identified: debonding within concrete surface, ...
Abstract: This paper summarizes the results of experimental and analytical studies concerning the... more Abstract: This paper summarizes the results of experimental and analytical studies concerning the flexural strengthening of reinforced concrete beams by the external bonding of high-strength, lightweight fiber reinforced plastic (FRP) plates to the tension face of the ...
Structural Engineering and Mechanics, Oct 10, 2011
The strengthening and rehabilitation of reinforced concrete structures with externally bonded car... more The strengthening and rehabilitation of reinforced concrete structures with externally bonded carbon fibre reinforced polymer(FRP) laminates has shown excellent performance and, as a result, this technology is rapidly replacing steel plate bonding techniques. This paper addresses this issue, and presents results deals with the influence of external bonded CFRP-reinforcement on the time-dependent behavior of reinforced concrete beams. A total of eight reinforced concrete beams with cracked and un-cracked section, with and without ...
Kertas kerja ini menghuraikan suatu kajian ujikaji mengenai kelakuan lenturan keluar satah bagi p... more Kertas kerja ini menghuraikan suatu kajian ujikaji mengenai kelakuan lenturan keluar satah bagi panel-panel lantai komposit yang baru diperkenalkan, dinamakan'Panel Kepingan Keluli Berprofil Papan Kering (PSSDB)'. Panel-panel tersebut dibentuk dengan melekatkan lapisan papan kering kepada kepingan keluli berprofil menggunakan penyambung-penyambung mekanikal. Ianya sangat ringan, dengan demikian mudah dialih, dan boleh didirikan dengan cepat oleh tenaga kerja separuh mahir. Satu siri ujikaji keluar ...
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