NEW METHOD FOR THE DESIGN OF LOW ASPECT RATIO WALLS AGAINST SEISMIC ACTIONS
In the present work, the measurements that resulted from the tests of eleven wall specimens with aspect ratio of 1.0 and 1.5 are used, in order to set up analytical models for the calculation of the displacements due to the deformation of each considered strength resisting mechanism. For this reason the flexural, web shear and sliding shear mechanisms are distinguished. The novel subjects of the present study are the calculation methodologies of the sliding shear strength and of the top displacement due to the deformation of the sliding shear mechanism. The quantity and arrangement of the specimen reinforcement were chosen so as to ensure a flexural type of failure. It was found that web shear deformation increased, until maximum strength was achieved. After the point of maximum strength, web shear deformations decreased, while sliding shear deformations along the base main flexural crack increased. Relationships proposed to describe these phenomena are derived from appropriately modified existing models along with new, semi-empirical, ones. The analytical calculated quantities are compared with the experimental measurements and a good match is noted. It is concluded that in shear walls with low aspect ratio, sliding shear deformations appeared at the base plastic hinge, even in the case that flexural response initially dominates. Neglecting such shear deformations results in underestimating shear forces at the base of other vertical structural elements. According to this methodology, strength and deformation quantities are calculated permitting thus the use of the proposed methodology in both cases of force and displacement based design methods.
Shear walls Experimentation Nonlinear response Plastic hinges Ductility Lateral displacement Shear deformation Flexural strength Shear strength.
T.N. Salonikios T.K. Makarios
Inst. of Engineering Seismology and Earthquake Engineering, Thessaloniki, Greece
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）