强震区隧洞工程服役期抗震性能研究

doi:10.13722/j.cnki.jrme.2017.1246

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摘要

为了研究我国西部强震区重大岩石地下工程服役期的抗震性能，基于时变可靠度理论，提出一种地下工程衬砌服役期抗震性能的基于Matlab-Abaqus平台的BP联合计算方法。该方法基于拉丁超立方抽样技术和神经网络，因此具有精度高、计算量小等优点。以滇中引水香炉山隧洞为例，计算结果表明，结构抗力和荷载响应的均值在服役期内均呈现缓慢下降趋势，但结构抗力的标准差增长的更快，表现为结构抗力的样本离散程度更大，导致服役后期结构可靠度指标的迅速下降。该方法能快速有效地给出衬砌结构在整个服役期内的抗震性能及结构可靠度的变化趋势，为合理选择结构加固时间提供了理论依据，该方法为强震区地下工程服役期抗震性能研究提供参考和借鉴。

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	宋万鹏1
	2
	陈卫忠1
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	赵武胜1
	2
	杨典森1
	2
	赵坤1
	2

关键词 ：地下工程, 服役期, 抗震性能, 时变可靠度

Abstract：

In order to study the seismic performance of rock underground engineering during whole life in western China，a calculation method with Matlab-Abaqus-BP based on the time-dependent reliability theory is proposed for researching the seismic performance of underground structures in strong earthquake areas. The method has the advantages of high precision and small computational amount based on Latin hypercube sampling and neural network. Taking the Xianglushan Tunnel of Water diversion project in central Yunnan as an example，the calculated results show that both the mean values of structural resistance and load response show a slowly decreasing trend during the service period. However，the standard deviation of structural resistance increases more rapidly，indicating the samples of structural resistance are more discrete，which lead to the rapid decline of the reliability index in the late stage of service. The method can quickly and effectively study the seismic performance of the lining structure during the whole service period，and provide a theoretical basis for the reasonable selection of the structural reinforcement time. The method can be used to provide reference for the seismic performance of underground engineering to analyze the seismic performance of the tunnel during whole life.

Key words： underground engineering service period seismic performance time-dependent reliability

引用本文:

宋万鹏1，2，陈卫忠1，3，赵武胜1，2，杨典森1，2，赵坤1，2. 强震区隧洞工程服役期抗震性能研究[J]. 岩石力学与工程学报, 2018, 37(S1): 3533-3541.
SONG Wanpeng1，2，CHEN Weizhong1，3，ZHAO Wusheng1，2，YANG Diansen1，2，ZHAO Kun1，2. Study on seismic behavior of tunnel project during whole life for strong earthquakes. , 2018, 37(S1): 3533-3541.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2017.1246 或 https://rockmech.whrsm.ac.cn/CN/Y2018/V37/IS1/3533

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