| Dynamic Analysis of Structural Columns Subjected to Impulsive Loading |
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| 作者姓名： | GONG Shunfeng LU Yong GAO Feng JIN Weiliang |
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| 作者单位： | College of Civil and Architectural Engineering，Zhejiang University，Hangzhou 310027，China; School of Civil and Environmental Engineering，Nanyang Technological University，Singapore 639798 |
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| 摘 要： | For a building structure subjected to impulsive loading, particularly shock and impact loading , the response of the critical columns is crucial to the behaviour of the entire system during and after the blast loading phase. Therefore, an appropriate evaluation of the column response and damage under short-duration impulsive loading is important in a comprehensive assessment of the performance of a building system. This paper reports a dynamic analysis approach for the response of RC columns subjected to impulsive loading. Considering that the dynamic response of a column in a frame structure can also be affected by the floor movement which relates to the global vibration of the frame system, a generic column-mass model is used, in which a concentrated mass is attached to the column top to simulate the effect of a global vibration. To take into account the high shear effect under impulsive load, the model is formulated using Timoshenko beam theory, and three main nonlinear mechanisms are considered. Two typical scenarios, one under a direct air blast loading, and another under a blast-induced ground excitation, are analyzed and the primary response features are highlighted.
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Dynamic Analysis of Structural Columns Subjected to Impulsive Loading |
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| GONG Shunfeng,LU Yong,GAO Feng,JIN Weiliang.Dynamic Analysis of Structural Columns Subjected to Impulsive Loading[J].Transactions of Tianjin University,2006,12(Z1). |
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| Authors: | GONG Shunfeng LU Yong GAO Feng JIN Weiliang |
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| Abstract: | For a building structure subjected to impulsive loading, particularly shock and impact loading , the response of the critical columns is crucial to the behaviour of the entire system during and after the blast loading phase. Therefore, an appropriate evaluation of the column response and damage under short-duration impulsive loading is important in a comprehensive assessment of the performance of a building system. This paper reports a dynamic analysis approach for the response of RC columns subjected to impulsive loading. Considering that the dynamic response of a column in a frame structure can also be affected by the floor movement which relates to the global vibration of the frame system, a generic column-mass model is used, in which a concentrated mass is attached to the column top to simulate the effect of a global vibration. To take into account the high shear effect under impulsive load, the model is formulated using Timoshenko beam theory, and three main nonlinear mechanisms are considered. Two typical scenarios, one under a direct air blast loading, and another under a blast-induced ground excitation, are analyzed and the primary response features are highlighted. |
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| Keywords: | impulsive load RC column dynamic response Timoshenko beam nonlinear analysis |
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