Seismic Behavior of Asymmetric RC Frame Building Systems with One Major Wall
Traditionally, the seismic torsional resistance of an asymmetric building is evaluated based on the assumption that the torsional resistance of each element can be neglected. However, for some particular asymmetric structural configurations which are usually found in regions of low seismicity, such assumption might not lead to a conservative design. In this paper, a simplified one-story single-wall-frame structural model was adopted to study the effects of the torsional stiffness/resistance of the wall on the overall seismic response of the model. It is found that the torsional resistance of the wall can be substantially mobilized due to the large rotational displacement under ground motions. Simultaneously, the shear resistance of the wall can also be utilized because of the dynamic effect due to the rotary inertia of the mass. As a result, the interaction of shear and torque of the wall should be considered. It is also shown that this special structural system may actually fail under the combined shear-torsion loadings, in which the system is considered to be safe when the torsion stiffness/resistance of the wall is neglected. Moreover, the exclusion of the torsional resistance of the wall does not always lead to a conservative estimation of its shear demand. In some cases, the consideration of the wall torsion stiffness/resistance considerably reduces the torsional twist of the structural system.
Seismic behavior asymmetric structure torsion of wall single-wall-frame system
X. N. Peng Y. L. Wong
PhD Candidate. Dept. of Civil & Structural Engineering, The Hong Kong Polytechnic University. Hong K Associate Professor, Dept. of Civil & Structural Engineering, The Hong Kong Polytechnic University.
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）