带连廊的相邻建筑基础隔震改造碰撞危险性分析
Collision Risk Analysisof Base-isolation Retrofitted Adjacent Buildings Connected by a Corridor Bridge
作者：戴靠山(四川大学 建筑与环境学院, 四川 成都 610065)；罗翔(四川大学 建筑与环境学院, 四川 成都 610065)；吕洋(四川大学 建筑与环境学院, 四川 成都 610065)；张世明(同济大学 防灾减灾工程系, 上海 200092)
Author：DAI Kaoshan(College of Architecture and Environment, Sichuan Univ., Chengdu 610065, China)；LUO Xiang(College of Architecture and Environment, Sichuan Univ., Chengdu 610065, China)；LYU Yang(College of Architecture and Environment, Sichuan Univ., Chengdu 610065, China)；ZHANG Shiming(Dept. of Disaster Mitigation of Structures, Tongji Univ., Shanghai 200092, China)
收稿日期：2019-03-16 年卷（期）页码：2019,51(5):9-16
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：基础隔震;相邻建筑;碰撞;地震动入射角;阻尼器
Key words：base isolation;adjacent building;collision;seismic wave incidence angle;damper
基金项目：国家自然科学基金项目（U1710111；51878426）；四川省国际合作项目（18GJHZ0111）；中央高校基本科研业务费（20822041C4015）
中文摘要
对带有连廊的相邻建筑进行基础隔震改造。运用时程分析方法，考虑了不同地震波入射角度，计算水平双向地震动下建筑的地震响应。地震波根据《建筑抗震设计规范》（GB50011-2010）进行选取，考虑中震和大震2种不同工况。采用铅锌橡胶支座（LRB）与普通橡胶支座（LNR）组合的基础隔震系统。考虑到相邻建筑动力特性的差异，建立了带阻尼器的隔减震模型（BID）协调建筑运动，并与传统的隔震模型（BI）进行对比。研究结果表明：地震波入射角度对建筑碰撞危险性有影响，且在大震下更为显著；设置阻尼器能够有效地协调相邻建筑的非同步运动，降低其地震碰撞危险性。
英文摘要
Two adjacent buildings connected by a corridor bridge were retrofitted with the base isolation technology. Considering different seismic wave incidence angles, this paper calculated seismic responses of the buildings under bidirectional earthquakes using the time history analysis method. Earthquake inputs were selected following the GB50011-2010 code for seismic design of buildings, considering both design and rare intensity levels. The isolation layer consisted of lead-rubber bearings (LRB) and ordinary-rubber bearings (LNR). To solve the potential induced by the dynamic characteristic difference of the adjacent buildings, a base-isolation-with-damper (BID) model was adopted with supplemented viscous dampers, seismic responses of which were compared with the traditional base-isolation (BI) model. The research shows that, the seismic wave incidence angle can affect the building collision risk, especially under rare earthquakes. Supplemented dampers can effectively coordinate the asynchronous motion of adjacent buildings and reduce the risk of seismic collision.
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