交错桁架结构设计理论方法与装配式集成技术应用研究  

Design Theory Method of Staggered Truss Structure and Research on Assembled Integration Technology Application

作　　者：李瑞锋 刘新华 徐国军 Ruifeng Li;Xinhua Liu;Guojun Xu(Zhejiang Green Building Integration Technologies Co.,Ltd.,Shaoxing 312000,China)

机构地区：[1]浙江绿筑集成科技有限公司,浙江绍兴312000

出　　处：《钢结构（中英文）》2020年第11期55-64,共10页Steel Construction（Chinese & English）

摘　　要：交错桁架结构具有大跨度、大空间、刚度大、经济性好等特点,是一种新型的装配式钢结构体系。但是装配式交错桁架结构体系由于其独特的结构构造,其计算方法完全不同于传统钢框架结构,尤其交错桁架结构体系的整体计算分析楼面的假定对整体计算指标影响较大;以及装配式交错桁架结构在设计阶段计算分析时如何考虑施工对平面桁架的影响也是控制指标。通过对交错桁架结构关键的技术进行分析,并结合杭州萧山国际机场5、6号公寓楼项目,着重分析交错桁架结构在设计、施工过程中的桁架布置、楼板计算,以及对工程项目进行了弹性反应谱法分析及静力弹塑性分析,探究了交错桁架结构塑性发展机制。研究表明,简化的楼面计算模型解决了交错桁架设计阶段的计算问题,是一种可以直接应用的建模计算方法;并通过ETBAS和盈建科两款有限元分析软件的对比分析可知,钢结构装配式交错桁架结构具有良好的耗能机制及抗震性能,是一种值得推广应用的装配式结构体系。Staggered truss structure is a new type of fabricated steel structure system with the characteristics of large span,large space,large stiffness and good economy.However,due to its unique structure,the calculation method of the fabricated staggered truss structure system is completely different from the traditional steel frame structure,especially the assumption of the floor has a great influence on the overall calculation of the staggered truss structure system;and how to consider the influence of the construction on the plane truss in the calculation and analysis of the fabricated staggered truss structure in the design stage is also the control index.Based on the analysis of the key technology of staggered truss structure,and combined with Hangzhou Xiaoshan International Airport No.5 and No.6 apartment building project as an example,this paper focuses on the truss layout and floor calculation of staggered truss structure in the process of design and construction,as well as the elastic response spectrum method analysis and static elastic-plastic analysis of the project,and explores the plastic development mechanism of staggered truss structure.The research shows that the simplified floor calculation model solves the calculation problems in the design stage of staggered truss,and it is a kind of modeling calculation method that can be directly applied;and through the comparative analysis of two finite element analysis software of etbas and YJK,the fabricated staggered truss structure of steel structure has good energy dissipation mechanism and seismic performance,which is worthy of popularization and application Structure system.

关 键 词：装配式 交错桁架 钢结构 预应力空心叠合楼板(SPD) 静力弹塑性 

分 类 号：TU318[建筑科学—结构工程]