PUNCHING SHEAR PERFORMANCE OF HIGH AND ULTRA – HIGH REINFORCED CONCRETE SLAB- COLUMN CONNECTIONS
MANSOUR MOHAMED ABD EL-HALIM;
Abstract
The main goal of this research was to evaluate the performance of punching shear strength of high and ultra-high strength reinforced concrete slab column connections under centric and eccentric loads. Experimental and analytical investigations were conducted.
A two – phase experimental program was carried – out. In phase I, five slabs were tested under centric loads, the tests covered various parameters including the effect of concrete strengths on punching shear behavior and two different types of shear reinforcement (central mesh and shear studs) were investigated. Phase II included five slabs tested under eccentric vertical load of punching shear behavior for the tested slabs to cover various parameters including the effect of concrete strengths, with two different types of shear reinforcement (central mesh and shear studs) were investigated.
Finite element modeling, using ANSYS® release 14, was constructed for all specimens in both phases to study the compatibility in behavior between experimental and theoretical investigations. Different models were constructed to cover all the studied parameters as illustrated previously.
Parametric study was performed using 156 models representing the variations
covered various parameters including the effect of concrete strengths (〖fc〗^') on punching shear behavior with two different types of shear reinforcement (central mesh and shear studs).
The models could predict the full stress – strain response of tested concrete slabs under centric and eccentric loads. Different models were constructed to cover all the studied parameters as
illustrated previously for centric and eccentric loadings.
With aid of the parametric study results, empirical equation was proposed to determine the
nominal punching shear strength of flat slabs with and without shear reinforcement and a comparison with ACI code (ACI-318) was performed. A good agreement was obtained.
7.2Conclusions
In the light of the results obtained from the experimental, analytical investigations and parametric study, the accompanying conclusions were furnished:
A two – phase experimental program was carried – out. In phase I, five slabs were tested under centric loads, the tests covered various parameters including the effect of concrete strengths on punching shear behavior and two different types of shear reinforcement (central mesh and shear studs) were investigated. Phase II included five slabs tested under eccentric vertical load of punching shear behavior for the tested slabs to cover various parameters including the effect of concrete strengths, with two different types of shear reinforcement (central mesh and shear studs) were investigated.
Finite element modeling, using ANSYS® release 14, was constructed for all specimens in both phases to study the compatibility in behavior between experimental and theoretical investigations. Different models were constructed to cover all the studied parameters as illustrated previously.
Parametric study was performed using 156 models representing the variations
covered various parameters including the effect of concrete strengths (〖fc〗^') on punching shear behavior with two different types of shear reinforcement (central mesh and shear studs).
The models could predict the full stress – strain response of tested concrete slabs under centric and eccentric loads. Different models were constructed to cover all the studied parameters as
illustrated previously for centric and eccentric loadings.
With aid of the parametric study results, empirical equation was proposed to determine the
nominal punching shear strength of flat slabs with and without shear reinforcement and a comparison with ACI code (ACI-318) was performed. A good agreement was obtained.
7.2Conclusions
In the light of the results obtained from the experimental, analytical investigations and parametric study, the accompanying conclusions were furnished:
Other data
| Title | PUNCHING SHEAR PERFORMANCE OF HIGH AND ULTRA – HIGH REINFORCED CONCRETE SLAB- COLUMN CONNECTIONS | Other Titles | سلوك البلاطات ذات الخرسانة عالية المقاومة والأداء تحت تاثير القص الثاقب | Authors | MANSOUR MOHAMED ABD EL-HALIM | Issue Date | 2017 |
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