主余震序列型地震动的增量损伤谱研究

发布时间：2018-05-23 09:56

本文选题：主余震序列 + 增量损伤谱　；参考：《工程力学》2017年03期

【摘要】：为定量评估余震对主震损伤结构所造成的二次损伤,该文对主余震序列型地震动的增量损伤谱进行了研究。挑选533条真实主余震序列作为输入,采用Park-Ang(1985)损伤指数定义地震损伤,通过计算结构在主震和主余震序列作用下的损伤差值,定量评价余震对结构所造成的增量损伤。研究结果表明:余震对主震损伤结构所造成的增量损伤的变异性较强。某些主余震序列会对结构造成非常显著的增量损伤,而某些主余震序列却不会对结构造成明显的增量损伤。相比于短周期结构,中长周期结构在主余震序列作用下的增量损伤更大。若主震卓越周期高于余震卓越周期,则该主余震序列可视为不利主余震序列,对结构可能造成较大增量损伤。
[Abstract]:In order to quantitatively evaluate the secondary damage caused by aftershocks to the damaged structure of the main shock, the incremental damage spectrum of the main aftershock sequence type ground motion is studied in this paper. 533 real aftershock sequences are selected as input, and the damage index of Park-Angn 1985) is used to define earthquake damage. By calculating the damage difference between the main shock and the main aftershock sequence, the incremental damage caused by aftershock is quantitatively evaluated. The results show that the variation of incremental damage caused by aftershocks on the damaged structure of the main shock is strong. Some major aftershock sequences will cause very significant incremental damage to the structure, but some major aftershock sequences will not cause obvious incremental damage to the structure. Compared with the short period structure, the incremental damage of the medium and long period structure under the action of the main aftershock sequence is greater than that of the short period structure. If the dominant period of the main shock is higher than that of the aftershock, the sequence of the main aftershock can be regarded as the unfavorable sequence of the main aftershock, which may cause large incremental damage to the structure.
【作者单位】：结构工程灾变与控制教育部重点实验室(哈尔滨工业大学);哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51378162,51408155) 国家科技支撑计划课题项目(2013BAJ08B01) 中国博士后科学基金面上项目(2014M551251) 黑龙江省博士后项目(LBH-Z14114)
【分类号】：P315.9

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