地裂缝对西安火车站改扩建东配楼结构性能的影响  

INFLUENCE OF GROUND FISSURE ON THE STRUCTURE PERFORMANCE OF EAST ANNEXE OF XI’AN STATION RECONSTRUCTION PROJECT

作　　者：李慧[1] LI Hui(China Railway the First Survey and Design Institute Group Co.,Ltd.,Xi’an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司

出　　处：《工业建筑》2019年第5期67-74,共8页Industrial Construction

基　　金：国家自然科学基金项目(51308454);国家重点实验室科学研究计划项目(2017ZZKT-8);陕西省教育厅重点实验室科学研究计划项目(2018ZZKT-8);西安理工大学科技新星项目;中铁一院科研项目(院科16-59)

摘　　要：西安火车站改扩建中新建东配楼跨越了西安f 3地裂缝。为了对地裂缝进行合理避让,整体结构被分割成三个形状不规则的单体,各单体之间通过大跨度桁架和连廊连接。为了解地裂缝活动对结构性能的影响,深入分析大跨桁架的支座选型、结构关键杆件内力和层间位移角等性能指标。结果表明:桁架支座采用左端铰接、右端滑动布置时,地裂缝荷载对滑动支座水平位移和竖向反力影响相对较小;地裂缝荷载作用会引起结构局部梁、柱内力发生较大变化,而对桁架杆件影响较小;在30年地裂缝荷载作用下,大区和大三角区的二层纵向层间位移超出GB 50011—2010《建筑抗震设计规范》限值,应适当加强该区域结构的纵向刚度。The east annexe of Xi’an station reconstruction project will be built across the Xi’an f 3 ground fissure. In order to reasonably keep away from the ground fissure, the whole structure will be divided into three irregularly shaped parts, and each part is connected to other by a long-span truss and a connecting corridor. In order to study the effect of ground fissure action on structure performance, the support type selection of the long-span truss, the internal force and the story drift angle of the structure key members were studied in detail. The results showed that when the support type of the long-span truss was hinged at the left and slipping at the right, the horizontal displacement and vertical reaction force of slipping supports were relatively smaller under the influence of the ground fissure load. The internal force of local beams and columns would be greatly changed by the action of the ground fissure load, but the members of the long-span truss were less affected. The second layer longitudinal story drift angles of large area and large triangle area exceed the specification limit value of Code for Seismic Design of Buildings (GB 50011-2010) under the 30-year ground fissure load. Therefore, the longitudinal stiffness of the structure of these areas should be appropriately strengthened.

关 键 词：地裂缝 跨缝建筑 大跨叠层桁架 支座选型 内力分析 

分 类 号：TU31[建筑科学—结构工程]