不同规范中地下结构地震反应分析的反应位移法对比研究

发布时间：2018-03-24 13:39

本文选题：地下结构　切入点：地震反应　出处：《土木工程学报》2017年02期

【摘要】：反应位移法是一种实用的地下结构抗震反应分析方法,该方法计算步骤相对简便,具有较好的分析精度,在地下结构抗震设计计算中得到广泛使用,已被包括《城市轨道交通结构抗震设计规范》(GB 50909—2014)和《建筑抗震设计规范》(GB 50011—2010)等多部规范所采用。但是由于该方法在理论推导上的不同,以及不同研究者理解上的不一致,导致现行不同规范的计算模型和荷载输入存在差别。文中给出反应位移法的推导过程,分析反应位移法中各项荷载的合理形式和意义,对现行不同规范中反应位移法的计算模型作出明确判断,通过与动力时程计算结果的对比分析表明:反应位移法中地震作用的输入通过结构周边自由场应力实现,忽略部分周边自由场应力的计算模型是不合理的。
[Abstract]:The response displacement method is a practical method for seismic response analysis of underground structures. The calculation procedure of the method is relatively simple and has good analytical accuracy. It is widely used in the seismic design and calculation of underground structures. It has been adopted by many codes including the Code for Seismic Design of Urban Rail Transit structures (GB50909-2014) and the Code for aseismic Design of buildings (GB50011-2010). However, due to the difference in theoretical derivation of this method and the different understanding of different researchers, This paper presents the derivation process of the reactive displacement method, and analyzes the reasonable form and significance of the various loads in the reactive displacement method. The calculation model of response displacement method in different codes is clearly judged. The comparison and analysis with the results of dynamic time history calculation show that the input of seismic action in the response displacement method is realized by the free field stress around the structure. It is unreasonable to ignore the calculation model of partial peripheral free field stress.
【作者单位】：清华大学;
【基金】：国家自然科学基金(51478247);国家自然科学基金重大研究计划集成项目(91215301) 国家973项目(2011CB013602)
【分类号】：TU311.3;TU93

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