摘要
四川大学博物馆采用钢框架结构体系,并设置屈曲约束支撑改善结构的抗震性能。介绍了四川大学博物馆的结构设计参数及抗震性能目标。针对结构设计中的重难点,开展了屈曲约束支撑的工作机理分析、框架柱计算长度与穿层柱分析、东侧大悬挑空间的相关分析。利用反应谱分析及时程分析探究了屈曲约束支撑工作机理,分析结果表明,屈曲约束支撑能够有效改善钢结构产生塑性铰的状况,起到保护主体钢框架的作用。针对东侧大悬挑空间的功能要求,设计采用了屋顶桁架结合钢拉杆吊挂东侧大楼梯的结构形式,通过结构防连续倒塌分析、楼板应力分析、楼盖舒适度分析、关键节点有限元分析等确保该部位结构设计安全合理。对整体结构受力机理和薄弱部位进行了研究,提出了重点部位的设计原则和加强措施。
The Sichuan University Museum adopts a steel frame structure system and sets buckling⁃restrained brace(BRB)to improve the seismic performance of the structure.The structural design parameters and seismic performance objectives of Sichuan University Museum were introduced.Aiming at the key and difficult points in structural design,the working mechanism analysis of BRB,the analysis of the effective length of frame columns and the analysis of the cross⁃layer columns,and the correlation analysis of the large cantilever space on the east side were carried out.The working mechanism of BRB was explored by response spectrum analysis and time history analysis.The analysis results show that BRB can improve the plastic hinge of steel structure and play a role in protecting the main steel frame.According to the functional requirements of the large cantilever space on the east side,the design adopts the structural form of roof truss combined with steel tie rod hanging the east side stairs.Through the analysis of structural progressive collapse prevention,floor stress analysis,floor comfort analysis,key joint finite element analysis,etc.,the structural design of this part is safe and reasonable.The stress mechanism and weak parts of the whole structure were studied,and the design principles and strengthening measures of the key parts were put forward.
作者
张蜀泸
姚丽
张志军
朱思其
ZHANG Shulu;YAO Li;ZHANG Zhijun;ZHU Siqi(China Southwest Architectural Design and Research Institute Co.,Ltd.,Chengdu 610042,China)
出处
《建筑结构》
北大核心
2024年第11期100-106,共7页
Building Structure
关键词
四川大学博物馆
钢框架结构
屈曲约束支撑
性能化设计
空间悬挑
关键节点
Sichuan University Museum
steel frame structure
buckling⁃restrained brace
performance design
space cantilever
key joint
