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  张佳,王毅红,权登州,井彦林,叶丹.黄土地区地铁地下车站地震变形特性研究[J].震灾防御技术,2016,11(2):272-282, DOI:10.11899/zzfy20160210.

黄土地区地铁地下车站地震变形特性研究
摘要:    在黄土场地与地铁地下结构动力相互作用的振动台试验中,测得地铁车站结构的应变反应。基于实测数据分析地铁车站的应变反应特征,对比不同观测面内应变反应,分析地铁车站应变反应的空间效应,对地铁车站地震破坏特点进行描述。结果表明:随输入峰值加速度增加结构应变增大;西安人工波作用下结构应变大于松潘波和Taft波作用下的应变。结构内应变表现为中柱较大,侧墙居中,顶、底板较小。地震动较小时,中柱应变表现为上层柱顶大于柱底,下层柱底大于柱顶,且上层柱顶大于下层柱底;侧墙顶、底部应变较大,中部较小;板构件两端应变较大,中部较小。受结构端部效应及土结相互作用中倾斜与扭转的影响,地铁车站应变反应具有显著的空间效应,在低频成分较发育的西安人工波作用下应变反应的空间效应更显著。研究结论可为黄土地区地铁地下结构的抗震设计及相关理论研究提供重要参考。
作者单位
张佳 长安大学公路学院西安 710064西安市地下铁道有限责任公司西安 710018 
王毅红 长安大学建筑工程学院西安 710061 
权登州 长安大学建筑工程学院西安 710061 
井彦林 长安大学建筑工程学院西安 710061 
叶丹 长安大学建筑工程学院西安 710061 
关  键  词:黄土地区  地铁车站  振动台试验  应变反应  空间效应
DOI:10.11899/zzfy20160210
基金项目:国家自然科学基金资助项目(41472267);西安市地下铁道有限责任公司科研基金资助项目(D4-YJ-042014048)
收稿日期:2016-01-20
作者简介:张佳,女,生于1983年。博士生。主要从事城市轨道交通规划、抗震研究。E-mail: 375539874@qq.com
通讯作者:权登州,男,生于1983年。博士生。主要从事结构抗震研究。E-mail: qdz0809@163.com
A Study on the Strain Response of Underground Subway Station in Loess Region
Abstract:      The shaking table test of dynamic interacture between subway station and loess region structure was performed, and the strain responses of subway station were measured in the test. The characteristics of strain response of station were analyzed, and the spatial effect of strain response were revealed by comparison the data of different observation sections. Meanwhile, the earthquake damages of station were summarized through observation after the test. The results show that the strain responses of station are increased with the increase of PGA, and the strain responses are more intensive under Xi’an artificial wave than that under Songpan wave and Taft wave. The peak strains are larger in center pillars than those in side walls, while the peak strains of floor slabs are the smallest. Under lower PGA ground motion, the peak strains of center pillars are higher at the top and lower at the bottom in upper layer, and higher at the bottom and lower at the top in sub layer, and the maximum strain are larger in upper layer than that in sub layer. The peak strains of side walls show high at the top and bottom and low at the middle, and the peak strains of floor slabs show high at the ends and low at center. In addition, the spatial effect of strain responses is obvious because of end effect and torsion of station. The results could provide references for aseismic design and theoretical research of underground structures in loess area.
Keywords:  Loess area  Subway station  Shaking table test  Strain response  Spatial effect
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