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A modified strength capacity for composite slab using reliability approach

Design shear resistance coupled with lack of a probabilistic framework for the al- ternate deection requirement check for reinforced concrete (RC) slab, and the un- economical approach for pro_led composite slab strength determination are main challenges that contribute to design conservatism. Th...

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Main Author: Mohammed, Kachalla
Format: Thesis
Language:English
Published: 2016
Online Access:http://psasir.upm.edu.my/id/eprint/67064/1/FK%202016%20127%20IR.pdf
http://psasir.upm.edu.my/id/eprint/67064/
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spelling my.upm.eprints.670642019-02-19T00:12:46Z http://psasir.upm.edu.my/id/eprint/67064/ A modified strength capacity for composite slab using reliability approach Mohammed, Kachalla Design shear resistance coupled with lack of a probabilistic framework for the al- ternate deection requirement check for reinforced concrete (RC) slab, and the un- economical approach for pro_led composite slab strength determination are main challenges that contribute to design conservatism. This thesis proposes to ad- dress these challenges by implementing a rational- based approach in developing schemes for limit state performance enhancement and a numerical function for pro_led composite slab strength devoid of experimental procedure. Performance enhancement schemes employs the probabilistic safety appraisal in providing im- provement measures to the concrete shear resistance function and the provision for a simpli_ed probabilistic deection check while maintaining an acceptable closed form solution. Hence, variable deection, _defl and shear resistance, _prop factors are introduced to modify the existing limit state. Similarly, a procedural algorithm lead to the development of pro_led composite slab strength determination function for both longitudinal shear estimation methods by considering section slenderness and deck characteristics. First, composite deck safety performance against the load ratio function leads to safety bounds de_nitions that takes into consideration section slenderness and sheeting deck characteristics values delineated through l=6 and l=8, culminating in the formation of modi_ed strength function. The proba- bilistic based optimisation scheme shows potentials to improve RC slab design by suggesting 4% design moment reduction. Similarly, the concrete shear capacity can be increased signi_cantly with an enhancement _prop factor of 2.0, and a similar _defl value of 5.15 is also proposed to shore up the limiting deection requirement check under the use of a concrete strength class of 30 MPa. Furthermore, the developed strength determination effectively performs well in mimicking the prob- abilistic deck performance and composite slab strength determination that shows improvement in strength load estimation difference between the two longitudinal shear methods to 12% from 26%. The strength test performance between the developed scheme and the experiment based test results indicates high similarity, demonstrating the viability of the proposed strength determination methodology developed in this study. 2016-09 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/67064/1/FK%202016%20127%20IR.pdf Mohammed, Kachalla (2016) A modified strength capacity for composite slab using reliability approach. PhD thesis, Universiti Putra Malaysia.
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Design shear resistance coupled with lack of a probabilistic framework for the al- ternate deection requirement check for reinforced concrete (RC) slab, and the un- economical approach for pro_led composite slab strength determination are main challenges that contribute to design conservatism. This thesis proposes to ad- dress these challenges by implementing a rational- based approach in developing schemes for limit state performance enhancement and a numerical function for pro_led composite slab strength devoid of experimental procedure. Performance enhancement schemes employs the probabilistic safety appraisal in providing im- provement measures to the concrete shear resistance function and the provision for a simpli_ed probabilistic deection check while maintaining an acceptable closed form solution. Hence, variable deection, _defl and shear resistance, _prop factors are introduced to modify the existing limit state. Similarly, a procedural algorithm lead to the development of pro_led composite slab strength determination function for both longitudinal shear estimation methods by considering section slenderness and deck characteristics. First, composite deck safety performance against the load ratio function leads to safety bounds de_nitions that takes into consideration section slenderness and sheeting deck characteristics values delineated through l=6 and l=8, culminating in the formation of modi_ed strength function. The proba- bilistic based optimisation scheme shows potentials to improve RC slab design by suggesting 4% design moment reduction. Similarly, the concrete shear capacity can be increased signi_cantly with an enhancement _prop factor of 2.0, and a similar _defl value of 5.15 is also proposed to shore up the limiting deection requirement check under the use of a concrete strength class of 30 MPa. Furthermore, the developed strength determination effectively performs well in mimicking the prob- abilistic deck performance and composite slab strength determination that shows improvement in strength load estimation difference between the two longitudinal shear methods to 12% from 26%. The strength test performance between the developed scheme and the experiment based test results indicates high similarity, demonstrating the viability of the proposed strength determination methodology developed in this study.
format Thesis
author Mohammed, Kachalla
spellingShingle Mohammed, Kachalla
A modified strength capacity for composite slab using reliability approach
author_facet Mohammed, Kachalla
author_sort Mohammed, Kachalla
title A modified strength capacity for composite slab using reliability approach
title_short A modified strength capacity for composite slab using reliability approach
title_full A modified strength capacity for composite slab using reliability approach
title_fullStr A modified strength capacity for composite slab using reliability approach
title_full_unstemmed A modified strength capacity for composite slab using reliability approach
title_sort modified strength capacity for composite slab using reliability approach
publishDate 2016
url http://psasir.upm.edu.my/id/eprint/67064/1/FK%202016%20127%20IR.pdf
http://psasir.upm.edu.my/id/eprint/67064/
_version_ 1643838794426744832
score 13.211869

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