（上海浦东建筑设计研究院有限公司， 上海 201204）

［摘要］鸡泽县“多馆合一”由会展中心、博物馆、多功能厅、图书馆和青少年活动中心组成，采用钢-混凝土混合结构体系。屋面考虑了多种最不利风荷载参与的组合工况，结构阻尼比根据钢和混凝土材料区分，运用YJK和MIDAS/Gen软件进行整体分析计算，并采用了ABAQUS软件对斜向Y形或伞状格构式异形钢柱进行了线性屈曲和带初始缺陷非线性屈曲极限承载力分析，钢结构与混凝土结构之间的连接根据受力情况采取了一系列有效加强措施。分析结果表明，通过加强屋面钢结构薄弱部位能够保证结构的安全性，异形钢柱设计满足承载要求，钢和混凝土两种材料结构之间的连接是安全可靠的。

［关键词］钢-混凝土混合结构； 异形钢柱； 线性屈曲分析； 非线性屈曲分析； 承载力分析

中图分类号：TU398-9文献标识码：A文章编号：1002-848X(2020)23-0008-05

Structural design and analysis of "multi-venues-in-one" in Jize County

HUANG Binhui

（Shanghai Pudong Architectural Design & Research Institute Co., Ltd., Shanghai 201204, China）

Abstract:The  "multi-venues-in-one" in Jize County is composed of exhibition center, museum, multi-function hall, library and youth activity center, adopting steel-concrete mixed structural system. The roof considered a variety of combined working conditions involving the most unfavorable wind loads. The structural damping ratio was distinguished according to steel and concrete materials. The YJK and MIDAS/Gen software were used for overall analysis and calculation, and the ABAQUS software was used to analyze the ultimate bearing capacity of linear buckling and nonlinear buckling with initial imperfections of oblique Y-shaped or umbrella-shaped lattice special-shaped steel columns. The connection between the steel structure and the concrete structure adopted a series of effective strengthening measures according to the force situation. The analysis results show that the safety of the structure can be ensured by strengthening the weak parts of the roof steel structure, the special-shaped steel column design meets the bearing capacity requirements, and the connection between the steel and concrete structures is safe and reliable.

Keywords:steel-concrete mixed structure; special-shaped steel column; linear buckling analysis; nonlinear buckling analysis; bearing capacity analysis

作者简介：黄彬辉，在职博士研究生，高级工程师，一级注册结构工程师，Email：keyhbh@163.com。