复杂地基条件下土-结构动力相互作用分析  

Dynamic soil-structure interaction under complex soil environment

作　　者：林皋[1,2] 李志远[1,2] 李建波[1,2] LIN Gao;LI Zhi-yuan;LI Jian-bo(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Institute of Earthquake Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]海岸与近海工程国家重点实验室(大连理工大学),辽宁大连116024 [2]工程抗震研究所建设工程学部水利工程学院(大连理工大学),辽宁大连116024

出　　处：《岩土工程学报》2021年第9期1573-1580,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家重点研发计划项目(NMSRP 2016YFB0201001);中央高校基本科研业务费项目(DUT20TD209).

摘　　要：结构和地基动力相互作用(SSI)分析对大坝、桥梁、核电、地下结构的抗震安全评价具有重要意义。本文对SSI分析的发展现状和工程设计实践进行了扼要评述。值得指出,2011年日本福岛核电事故后,国际上普遍提高了对核电结构抗震安全性的需求。因此,对重要结构的安全评价发展更为完善的先进SSI计算模型势在必行。为此目的,对处于复杂地基条件下的SSI分析提出一种新的计算模型,可以方便地考虑结构近场各种非均质因素的影响而不增加计算工作量,其中包括地基分层、基础埋深、建基面水平、存在相邻建筑物、附近出现软弱地质体等因素。这使SSI的计算更为准确和高效。论文的数值算例论证了所建议方法的有效性。The dynamic soil-structure interaction(SSI)analysis is of great significance to the earthquake safety evaluation of infrastructures,such as dams,bridges,nuclear power structures,etc.The state of the art and the current design practice of SSI analysis are briefly reviewed.It is worth to mention that after the 2011 accident of Fukushima Nuclear Power Plant in Japan,the international demand for the earthquake safety of nuclear power structures has been raised.Hence,it is imperative to develop more advanced appropriate computational models for the safety evaluation of the important structures.For this purpose,a novel SSI analysis model under complex soil environment is proposed so that the influences of the inhomogeneities appearing in the near field of the structure including the layering of the half-space,the embedment of the foundation,the layout level of the foundation base,the existence of adjacent structures,the nearly soft geologic inclusions,the irregular interfaces between the layers can be easily and conveniently taken into consideration without additional effort.As a result,the computation can be more accurate and efficient.Numerical examples are provided to validate the effectiveness of the proposed approach.

关 键 词：土-结构相互作用 复杂地基环境 基础结构 抗震安全评价 

分 类 号：TU435[建筑科学—岩土工程]