Department of Civil Engineering
Permanent URI for this collectionhttp://localhost:4000/handle/123456789/1927
Browse
3 results
Search Results
Item Influence of Openings on the Structural Response of Shear Wall(Hindawi Publishing Corporation, 2014) Muthukumar, G .; Kumar, ManojShear walls have been conferred as a major lateral load resisting element in a building in any seismic prone zone. It is essential to determine behavior of shear wall in the preelastic and postelastic stage. Shear walls may be provided with openings due to functional requirement of the building. The size and location of opening may play a significant role in the response of shear walls. Though it is a well known fact that size of openings affects the structural response of shear walls significantly, there is no clear consensus on the behavior of shear walls under different opening locations. The present study aims to study the dynamic behavior of shear walls under various opening locations using nonlinear finite element analysis using degenerated shell element with assumed strain approach. Only material nonlinearity has been considered using plasticity approach. A five-parameter Willam-Warnke failure criterion is considered to define the yielding/crushing of the concrete with tensile cutoff. The time history responses have been plotted for all opening cases with and without ductile detailing. The analysis has been done for different damping ratios. It has been observed that the large number of small openings resulted in better displacement response.Item Nonlinear finite element dynamic analysis of squat shear wall with openings(Springer, 2013-11) Muthukumar, G .Shear wall has been considered as a major lateral load-resisting element inmultistoried building located in wind- or earthquake-prone zone. The behavior ofshear wall under various loading conditions has been the subject of intenseresearch for the last few decades. The behavior of shear walls without openingsis completely well understood and well documented in literature. The use ofsquat shear wall has been found in many low-rise buildings. On the other hand,squat shear walls may also be provided with openings due to the functionalrequirement such as placement of doors/windows in the building. The size andlocation of the opening play a significant role in the response of the shearwall. Even though it is intuitively known that the size of opening hassignificant effects on the behavior of a shear wall, it is desirable to know thelimiting size of opening in the shear wall, beyond which the shear walls mayfail or become unserviceable, especially when subjected to severe earthquakeground motions. In this study, the materially nonlinear dynamic response of theshear wall, with and without openings for different damping ratios, subjected toEL Centro earthquake has been captured. For dynamic analysis, constantacceleration Newmark β method of direct time integration has been used.From the study, it was observed that the presence of opening results in severedisplacements and stresses on the shear wall and also results in stressconcentration near the opening tip. Hence, the presence of damping has beenconsidered to be vital for large opening under severe dynamic loadingconditions.Item Nonlinear finite element dynamic analysis of squat shear wall with openings(Springer, 2013-11-11) Kumar, ManojShear wall has been considered as a major lateral load-resisting element inmultistoried building located in wind- or earthquake-prone zone. The behavior ofshear wall under various loading conditions has been the subject of intenseresearch for the last few decades. The behavior of shear walls without openingsis completely well understood and well documented in literature. The use ofsquat shear wall has been found in many low-rise buildings. On the other hand,squat shear walls may also be provided with openings due to the functionalrequirement such as placement of doors/windows in the building. The size andlocation of the opening play a significant role in the response of the shearwall. Even though it is intuitively known that the size of opening hassignificant effects on the behavior of a shear wall, it is desirable to know thelimiting size of opening in the shear wall, beyond which the shear walls mayfail or become unserviceable, especially when subjected to severe earthquakeground motions. In this study, the materially nonlinear dynamic response of theshear wall, with and without openings for different damping ratios, subjected toEL Centro earthquake has been captured. For dynamic analysis, constantacceleration Newmark β method of direct time integration has been used.From the study, it was observed that the presence of opening results in severedisplacements and stresses on the shear wall and also results in stressconcentration near the opening tip. Hence, the presence of damping has beenconsidered to be vital for large opening under severe dynamic loadingconditions.