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Abstract
Coupled shear walls are frequently used in high rise buildings to
overcome lateral loads resulting from wind and earthquakes. During
earthquakes, structures are exposed to cracking and to some extent
yielding of structural members leading to necessity the nonlinear structural analysis.
The aim of this research is to develop a nonlinear finite element model and incorporate such model into a computer program to solve a plane reinforced concrete structures such as shear walls, deep beams,plane frames, .... etc, due to different dynamic or static loads. The computer program has many capabilities to calculates the response of the principal’ stresses, principal strains, lateral displacement at any joint, the case of element ((no crack or number of crack) in case of tension, (elastic, plastic, elastic unloading, plastic unloading) in case of compression).
Steel reinforcement is represented by nonlinear bar elements. The
verification of the program is made based on different experiential
published researches where good agreement is observed when comparing
the results of proposed models to that of previous experimental results
found in literature. Finally, the computer program is used to investigate
the behavior of coupled shear walls under seismic loads. The used model
reflects the actual size for both types of elements (concrete and steel
elements) for which the mesh used is O.2m*O.2m to represent the studied
coupled shear walls. A parametric study is made to observe the effect of
numerous parameters on the behavior of coupled shear walls. Several
parameters such as change the depth of coupling beam, amount of steel
ratio, floor mass are studied. Conclusions are made about the effect of
such design parameters on the behavior of RC coupled shear walls as a
guide for practitioner engineers.
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