近断层主余震P波斜入射下水电站厂房地震能量响应  

Nonlinear Response of Powerhouse of Hydropower Station Under Oblique P Wave Incidence of Main Aftershock Near Fault

作　　者：庞鑫宇 宋志强[1] 张存慧 王飞 PANG Xinyu;SONG Zhiqiang;ZHANG Cunhui;WANG Fei(State Key Laboratory of Eco-Hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China;Changjiang Institute of Survey Planning Design and Research,Wuhan 430010,China;School of Energy and Power Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [2]长江勘测规划设计研究有限责任公司,湖北武汉430010 [3]西华大学能源与动力工程学院,四川成都610039

出　　处：《人民黄河》2024年第12期155-160,共6页Yellow River

基　　金：国家自然科学基金重点项目(52039008);陕西省自然科学基础研究计划面上项目(2022JM-276);陕西省教育厅青年创新团队科研计划项目(22JP052)。

摘　　要：主震造成损伤破坏的水电站厂房若短时间内无法进行除险加固,则在余震作用下会加重损伤破坏。近断层主余震序列具有特殊的地震特性,对水电站厂房的破坏十分严重,研究其斜入射波动输入方法可以更真实地模拟实际情况,为厂房的抗震安全评价提供参考。通过选取近断层主余震序列,考虑P波不同角度斜入射,研究水电站厂房非线性地震能量响应规律。结果表明:主余震P波斜入射下厂房的总输入能和损伤耗散能随入射角的增大而增大,近断层主余震作用下厂房的材料非线性随入射角的增大而增大;余震峰值加速度大的脉冲型主余震作用下厂房总输入能和损伤耗散能增大最明显,其非线性强于其他类型。After the main shock damages the structure,aftershocks will occur if the reinforcement cannot be carried out in a short period of time,which will further deepen the damage and damage of the hydropower plant damaged by the main shock under the action of aftershocks.The near⁃fault main aftershock sequence has special seismic characteristics,and the damage to the powerhouse of the hydropower station is very serious.The study of its oblique input method can simulate the actual situation more realistically,and provide a reference for the seismic safety evaluation of the powerhouse.In this paper,by selecting the real near⁃fault main aftershock sequence and considering the oblique inci⁃dence of P waves at different angles,the law of the nonlinear seismic energy response of the powerhouse of the hydropower station was stud⁃ied.The results show that the total input energy and damage dissipation energy of the powerhouse under the main aftershock P wave oblique incidence increase the incident angle,the nonlinear mechanical phenomena of the powerhouse under the main aftershock near the fault in⁃crease with the increase of the incident angle.The total input energy and damage dissipation energy of the powerhouse increase most obviously under the action of pulse⁃type main aftershocks with high aftershock peak acceleration,and the nonlinear state of the powerhouse under the action is stronger than that of other types.

关 键 词：水电站厂房 近断层 主余震序列 P波斜入射 非线性响应 

分 类 号：TV312[水利工程—水工结构工程] TV731.1