基于修正IDA法的隧道地震易损性分析

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (17) : 106-115.

论文

基于修正IDA法的隧道地震易损性分析

董正方1,2，刘淦之1，曾繁凯3，康帅1

作者信息 +

Seismic vulnerability analysis of tunnel based on modified IDA method

DONG Zhengfang1,2, LIU Ganzhi1, ZENG Fankai3, KANG Shuai1

Author information +

文章历史 +

摘要

为了研究隧道的抗震能力，通过修正增量动力分析法得到概率地震需求模型，将工程需求参数限值与概率地震需求模型结合得到各个地震动强度下的结构失效概率，获得结构的地震易损性曲线来评价隧道的抗震性能。以典型地下管廊和盾构隧道为例，利用SAP2000软件建立有限元模型，设立12种工况探讨了不同场地类别、埋深、截面尺寸对不同结构型式隧道抗震能力的影响。研究结果表明：场地类别对隧道结构损伤程度的影响最大，其中Ⅳ类场地中的结构危险程度最大；隧道结构在进入弹塑性工作阶段具有较好的抗震能力；埋深大的隧道结构比埋深小的更为危险；大横截面的隧道结构相比小截面的更为危险。

Abstract

Here, to study seismic capacity of a tunnel, the probabilistic seismic demand model was obtained with the modified
incremental dynamic analysis (IDA) method.The structural failure probability under each seismic intensity was obtained by combining engineering demand parameters’ limit values with the probabilistic seismic demand model, and the seismic fragility curve of the structure was obtained to evaluate the seismic behavior of the tunnel.Taking a typical underground pipe gallery and a shield tunnel as examples, their finite element models were established using SAP2000 software, and 12 working conditions were set up to discuss effects of site type, buried depth and section size on seismic capacity of tunnels with different structure types.The results showed that site type has the largest influence on damage degree of tunnel structure, the structural danger degree of the site type IV is the largest; tunnel structure has better seismic capacity in its elastic-plastic working stage; tunnel structure with large buried depth is more dangerous than that with small buried depth; tunnel structure with large cross-section is more dangerous than that with small cross-section.

导出引用

董正方，刘淦之，曾繁凯，康帅. 基于修正IDA法的隧道地震易损性分析[J]. 振动与冲击, 2021, 40(17): 106-115

DONG Zhengfang, LIU Ganzhi, ZENG Fankai, KANG Shuai. Seismic vulnerability analysis of tunnel based on modified IDA method[J]. Journal of Vibration and Shock, 2021, 40(17): 106-115

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