摘要
以锡林浩特第三小学风雨操场为例,建立了单独管桁架屋盖有限元模型,以及两种不同边界约束条件的整体结构模型,通过分析结构的动力特性,比较三种模型屋盖的杆件内力、应力和最大位移的差异,得到支座约束条件的不同对屋盖自振特性和挠度产生影响,单独计算屋盖模型不能完全模拟下部混凝土框架对上部大跨管桁架屋盖的约束作用,为保证结构的设计安全,必要时应对结构进行边界约束条件分析,也为以后的设计工作提供参考。
Taking the wind and rain field of third primary school in Xilinhot as an example,a finite element model of a single tube truss roof and a whole structure model with two different boundary constraints were established. By analyzing the dynamic characteristics of the structure,the differences between the internal forces,the stress and the maximum displacement of the three model roofs were compared,and the bearing constraint bars were obtained. The different parts have influence on the self-vibration characteristics and deflection of the roof. The separate calculation of the roof model cannot completely simulate the restraining effect of the lower concrete frame on the upper span pipe truss roof. In order to ensure the safety of the structure design,the boundary constraint conditions of the structure should be analyzed,and the future design work is also provided.
作者
李路川
武守相
赵彧洋
于敬海
李敬明
Li Luchuan;Wu Shouxiang;Zhao Yuyang;Yu Jinghai;Li Jingming(Architectural Design and Research Institute of Tianjin University,Tianjin 300073,China;Central and Southern China Municipal Engineering Design & Research institute Co.,Ltd.,Wuhan 430010,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China)
出处
《建筑结构》
CSCD
北大核心
2018年第S2期498-501,共4页
Building Structure
关键词
管桁架结构
协同工作
整体分析
边界条件
tube truss structure
collaborative work
overall analysis
boundary conditions
