摘要
伸臂桁架是超高层结构中的关键构件,改善其耗能能力对提升结构的抗震性能具有重要意义。常见的伸臂桁架形式主要有普通支撑型伸臂桁架、屈曲约束支撑型(BRB)伸臂桁架和阻尼型伸臂桁架等。该文从框架-核心筒-伸臂桁架结构体系入手,对普通支撑型、屈曲约束支撑型和阻尼型伸臂桁架的受力性能和耗能性能进行了研究。结果表明,结构采用不同的伸臂桁架会对其在地震作用下的地震能量输入和耗能分布产生一定影响。和普通支撑桁架体系相比,屈曲约束支撑型和阻尼型伸臂桁架结构体系具有更好的耗能性能。此外,在对核心筒的损伤程度控制方面,阻尼型伸臂桁架的作用更加明显,而在整体结构的位移响应控制方面,BRB伸臂桁架的效果最好。
The outriggers are the key components of super-tall structures.Increasing the energy dissipation capacities of outriggers is of a great significance on improving the structural aseismic performance.The commonly used outriggers include regular outriggers,buckling restrained braces(BRB)outriggers,and outriggers with dampers.Based on a super-tall frame-core-outrigger structure,the energy dissipation and aseismic performance of regular outriggers,buckling restrained braces(BRB)outriggers,and outriggers with dampers are investigated and compared.The results indicate that different outriggers have some impacts on the seismic energy input and energy distribution of the structure.Compared with the ordinary outrigger system,the BRB and damped outrigger systems have better energy consumption performance.In addition,the damped outrigger has a more obvious effect on the damage control of the core cylinder,while the BRB outrigger has the best effect in the displacement response control for the overall structure of a super-tall building.
作者
甄伟
邱意坤
杨青顺
张万开
ZHEN Wei;QIU Yi-kun;YANG Qing-shun;ZHANG Wan-kai(Beijing Institute of Architectural Design,Beijing 100045,China;College of Civil Engineering,Qinghai University,Qinghai 810016,China)
出处
《工程力学》
EI
CSCD
北大核心
2021年第2期36-43,共8页
Engineering Mechanics
基金
青海省科技计划项目(2019-ZJ-975Q)
创新平台:青海省创新平台建设专项项目(2018-ZJ-T01)。
关键词
超高层结构
伸臂桁架
屈曲约束支撑
摩擦型阻尼
耗能性能
super-tall structure
outrigger
buckling-restrained brace
friction damper
energy dissipation
