(广东省建筑设计研究院有限公司深圳分公司, 深圳 518063)

摘要: 某学校学院楼项目结构高度为 23.5m,下部采用混凝土框架结构,上部有一大跨度钢桁架结构横跨在两端教学区结构上. 研究了铅芯橡胶支座、铅芯橡胶支座+黏滞阻尼器、摩擦摆支座三种隔震方案,对各方案均进行了相关的隔震支座设计,确定了各方案的支座及阻尼器的力学参数,通过选择合适的摩擦系数,可使摩擦摆支座在保证良好减震效果的同时也能更好地控制罕遇地震下变形,且耐久性较好. 分析结果表明:摩擦摆支座方案可以达到铅芯橡胶支座+黏滞阻尼器方案的隔震效果,并且能使结构变形不至于过大.

关键词: 隔震方案; 减震系数; 黏滞阻尼器; 罕遇地震变形; 摩擦系数; 温度应力

中图分类号:TU318.2 文献标志码:A 文章编号:1002-848X(2022)21-0139-05

DOI:10.19701 / j.jzjg.GDAD2209

Comparison and design of seismic isolation schemes for a college building

QU Tao, WEI Wen, GU Jingxin

(Shenzhen Branch of Guangdong Architectural Design & Research Institute Co. , Ltd., Shenzhen 518063, China)

Abstract:The structural height of a college building is 23.5m. The lower part of the building adopts concrete framestructure, and the upper part has a large-span steel truss spanning the teaching area structure at both ends. Three vibrationisolation schemes of lead rubber bearing, lead rubber bearing with viscous damper and friction pendulum bearing werestudied. The seismic isolation bearing design was carried out for all three schemes, and the mechanical parameters of thebearing and damper were determined. By selecting an appropriate friction coefficient, the friction pendulum bearing canbetter control the deformation under rare earthquakes while ensuring good shock absorption effect, and it has gooddurability. The analysis results show that the friction pendulum bearing scheme can achieve the isolation effect of leadrubber bearing + viscous damper scheme, and the deformation of the structure is not too large.

Keywords:seismic isolation scheme; damping coefficient; viscous damper; deformation under rare earthquake; frictioncoefficient; temperature stress

第一作者:屈涛,硕士,高级工程师,一级注册结构工程师,主要从事结构设计工作,Email: 30300277@ qq. com.

[引用本文] 屈涛,卫文,古静欣. 某学院楼减隔震方案比选与设计[J]. 建筑结构,2022,52(21):139-143. QU Tao,WEI Wen,GU Jingxin. Comparison and design of seismic isolation schemes for a college building[J]. Building Structure,2022,52(21):139-143.