| 考虑主余震序列作用的砌体结构易损性分析 |
| |
| 引用本文： | (周 强,夏 贇,赵文洋,郭倩勤.考虑主余震序列作用的砌体结构易损性分析[J].世界地震工程,2023,39(2):052-61. |
| |
| 作者姓名： | (周 强 夏 贇 赵文洋 郭倩勤 |
| |
| 作者单位： | 南昌大学 工程建设学院,江西 南昌 330031 |
| |
| 摘 要： | 鉴于我国砌体结构抗震面临的严峻形势,以及主余震序列作用下砌体结构易损性研究存在的不足,以汶川地震中1栋典型砌体房屋为依托,开展考虑主余震序列作用的砌体结构易损性研究。首先,建立了结构的三维有限元模型,并从结构动力特性与损伤等方面验证了模型的合理性; 其次,选取整体损伤耗能作为结构性能参数,并给出了对应不同破坏等级的结构整体损伤耗能界限值; 最后,基于IDA方法对结构进行了不同主余震序列作用下的易损性分析。结果表明:相对于层间位移角,整体损伤耗能更适用于描述余震对结构的累积损伤效应; 随着结构主震损伤程度的加深,余震对结构造成的影响越明显,且主余震序列作用下结构呈现出比主震单独作用下高一个破坏等级的趋势; 当ΔPGA小于0.6时,结构的极限状态超越概率最大增幅不超过10%,此时余震的影响较小; 当ΔPGA大于0.6时,结构的极限状态超越概率最大增幅可达到33.1%,此时余震的影响较大。
|
| 关 键 词： | 主余震序列 砌体结构 IDA分析 整体损伤耗能 易损性分析 |
Vulnerability analysis of masonry structure considering sequence of mainshock-aftershock |
| |
| (ZHOU Qiang,XIA Yun,ZHAO Wenyang,GUO Qianqin.Vulnerability analysis of masonry structure considering sequence of mainshock-aftershock[J].World Information On Earthquake Engineering,2023,39(2):052-61. |
| |
| Authors: | (ZHOU Qiang XIA Yun ZHAO Wenyang GUO Qianqin |
| |
| Affiliation: | School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China |
| |
| Abstract: | In view of the severe situation faced by masonry structures in China in terms of earthquake resistance, and the shortcomings in the research on vulnerability of masonry structures under the action of mainshock-aftershock, based on a typical masonry house in the Wenchuan earthquake, a study on the vulnerability of masonry structures considering the action of the sequence of mainshock-aftershock was carried out. Firstly, a three-dimensional finite element model of the structure is established, and the rationality of the model is verified from the aspects of structural dynamic characteristics and damage; secondly, the overall damage energy dissipation is selected as the structural performance parameter, and the overall structure corresponding to different damage levels is given. The overall damage energy dissipation limit value; finally, the vulnerability analysis of the structure under the action of different sequence of mainshock-aftershocks is carried out based on the IDA method. The results show that the overall damage energy dissipation is more suitable for describing the cumulative damage effect of aftershocks on the structure than the interstory displacement angle. The lower structure shows a trend of a higher damage level than that under the action of the main shock alone; when ΔPGA is less than 0.6, the maximum increase in the limit state exceeding probability of the structure does not exceed 10%, and the impact of aftershocks is small at this time; when ΔPGA is greater than 0.6, the maximum increase in the probability of exceeding the limit state of the structure can reach 33.1%, and the impact of aftershocks is greater at this time. |
| |
| Keywords: | sequence of mainshock-aftershock masonry structure IDA analysis overall damage energy dissipation vulnerability analysis |
|
| 点击此处可从《世界地震工程》浏览原始摘要信息 |
|
点击此处可从《世界地震工程》下载全文 |
|
