（1 天津大学建筑工程学院， 天津 300072；  2 天津大学滨海土木工程结构与安全教育部重点实验室， 天津 300072； 3 天津市城市规划设计研究院， 天津 300201）

［摘要］滨海文化中心图书馆为大跨度连体结构，采用组合钢框架-支撑结构体系。结构5,6层采用贯通两层的54m跨度的钢桁架相连，该桁架跨度大、受荷重，为结构的关键部位。大跨度桁架与单柱连接的隔板贯通节点、大跨度桁架与组合柱连接的隔板贯通节点、两层桁架连接节点构造复杂,焊缝较多且板厚较大，为结构的关键节点。根据MIDAS Gen软件计算结果提取节点相连杆件中震下杆端内力，采用ABAQUS有限元软件对三处关键节点进行非线性分析。结果表明，三处节点局部存在应力集中现象，总体可以满足中震弹性的抗震设防目标。

［关键词］滨海文化中心图书馆； 关键节点； 非线性分析

中图分类号：TU391文献标识码：A文章编号：1002-848X(2018)14-0071-04

Research and analysis on key connections of Library in Binhai Cultural Center

Jiang Yuting1, Chen Zhihua1,2, Han Ning3, Sun Kezhang3

(1 School of Civil Engineering， Tianjin University， Tianjin 300072， China; 2 Key Laboratory of Coast Civil Structure Safety of Ministry of Education， Tianjin University， Tianjin 300072， China; 3 Tianjin Urban Planning ＆ Design Institute， Tianjin 300201， China)

Abstract:Library in Binhai Cultural Center is a large-span connected structure with composite steel frame-brace structural system. The 54m-span steel truss through the fifth and sixth layer is used to connect the two layers, and the truss has large span and bears heavy loads, which is the key part of the structure. The diaphragm-through connections between large-span truss and single column, the diaphragm-through connections between truss and composite column and the connections of the two-layer truss are the key connections of the structure and they are complex structures with many welding joints and thick steel plates. The internal force of rod end was extracted under fortification earthquake by using MIDAS Gen software, and the finite element software ABAQUS was used to analyze the three key connections considering nonlinearity. The results show that the three connections have local stress concentration phenomenon, and they can fulfill seismic fortification goal of elastic under fortification earthquake.

Keywords:Library in Binhai Cultural Center; key connection; nonlinear analysis

*国家自然科学基金(61272264)。

作者简介：姜玉挺，硕士，工程师，Email: asdfsad1234@163.com。