(1 四川省建筑设计研究院有限公司, 成都 610095;2 四川省建筑设计研究院有限公司复杂结构设计研究中心, 成都 610095)

摘要: 白鹭湾湿地段 L5 林盘建筑采用带弧形悬挑空腹桁架的钢框架-支撑结构. 通过弧形空腹桁架受力特点及三种桁架体系的对比分析,确定了内、外环弧形空腹桁架间设置竖向人字形支撑的悬挑桁架结构形式. 多遇地震下的弹性时程分析得到的楼层位移、最大层间位移角及楼层剪力均与反应谱分析的结果较吻合,验证了采用反应谱法能够满足施工图设计要求. 通过罕遇地震下的弹塑性时程分析,对基底剪力、弹塑性层间位移角、构件承载力进行了复核,结果表明,整体结构在罕遇地震下表现出较好的抗震性能,能够满足预设性能目标. 针对大跨度悬挑区域,进行了楼板舒适度分析,结果表明,结构设计满足舒适度要求.

关键词: 钢结构设计; 悬挑结构; 弧形空腹桁架; 屈曲约束支撑; 时程分析; 舒适度分析

中图分类号:TU318+. 2 文献标志码:A 文章编号:1002-848X(2023)07-0071-07

DOI:10. 19701 / j. jzjg. SADI2326

Design of steel frame-supporting structure with arc vierendeel truss

YANG Shuheng1,2, ZHAO Shixing1,2, LIU Yupeng1,2, HE Jie1,2, DONG Junlong1,2, FAN Qinchuan1,2

(1 Sichuan Provincial Architectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China;2 Complex Structure Design and Research Center, Sichuan Provincial Architectural Design andResearch Institute Co. , Ltd. , Chengdu 610095, China)

Abstract: The L5 forest buildings in Bailuwan wetland adopts steel frame-supporting structure with arc cantilever vierendeeltruss. Based on the mechanical characteristics of the arc vierendeel truss and the comparative analysis of three truss systems,the cantilever truss structure form with vertical herringbone shape bracing between the inner and outer arc vierendeel trusseswas determined. The floor displacement, the maximum inter story displacement angle and the floor shear force obtained fromthe elastic time history analysis under frequent earthquakes were consistent with the results of the response spectrum analysis,which verifies that the response spectrum method can meet the requirements of the construction drawing design. Through theelastic-plastic time history analysis under the rare earthquake, the base shear force, elastic-plastic interlayer displacementangle and member bearing capacity were reviewed. The results show that the overall structure shows good seismic performanceunder the rare earthquake and can meet the preset performance goals. The floor comfort analysis was carried out for large-spancantilever area. The results show that the structural design meets the comfort requirements.

Keywords: steel structure design; cantilever structure; arc vierendeel truss; bucking restrained brace; time-historyanalysis;comfort analysis

∗四川华西集团有限公司科研项目(KY202106).

第一作者:杨姝姮,硕士,工程师,主要从事钢结构、复杂结构的设计与研究,Email:yangshuheng_92@ 163. com.

[引用本文] 杨姝姮,赵仕兴,刘宇鹏,等. 带弧形空腹桁架的钢框架-支撑结构设计[ J]. 建筑结构,2023,53(7):71-77,40. YANG Shuheng, ZHAO Shixing, LIU Yupeng, et al. Design of steel frame-supporting structure with arcvierendeel truss[J]. Building Structure,2023,53(7):71-77,40.