张弦梁结构的分析与力学性能研究  

Structural Analysis and Mechanical Behavior Research of Beam String Structures

作　　者：赵基达[1] 梁存之[1] 

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《建筑科学》2015年第1期1-6,共6页Building Science

基　　金："十二五"国家科技支撑计划课题"建筑结构绿色建造专项技术研究"(课题编号:2012BAJ03B06)

摘　　要：张弦梁结构由上弦梁与下弦索通过竖向撑杆组成,其力学性能优异、结构效率高,在屋盖结构尤其是楼盖结构中有较好的应用前景。本文对张弦梁结构的分析方法与力学性能进行了系统的研究,根据张弦梁结构的自平衡特点,对索与梁建立变形协调方程,给出了张弦梁结构的平衡微分方程,设定位移函数,用伽辽金法进行求解。分别求得张弦梁结构在均布与反对称荷载下内力与位移的解析解。为证实这一连续化理论计算方法的准确性,特与非线性有限元计算结果进行了分析比较,证明本理论方法计算方便、直观精确,可用于张弦梁结构的分析与计算。根据理论公式,对张弦梁结构的静力性能进行了讨论,包括结构的线性性能、结构刚度、反对称荷载下的变形、预应力的控制作用与支座水平位移等方面,对张弦梁结构的研究与工程应用有较好的指导意义。Beam string structures （BSS） consist of upper chord beam and lower chord connected by vertical bars and have a broad scope in future as roofs especially as floors for its excellent mechanical properties and high structure efficiency. In this paper, analysis methods and mechanical properties of BSS are researched in detail. Deformation compatibility equation is established firstly, then differential equations of equilibrium are deduced and analytical solutions about inner force and deformation under uniform and anti-symmetric load are obtained by Galerkin method according to the assumed displacement function. The correctness of the analytical solutions is proved by the result obtained by using FEM, and at the same time, the theory of this paper is proved to be precision convenience and brevity, which can be used to analyze BSS. Static behaviors such as of linear performance, structure stiffness, deformation under anti-symmetrical load, controlling effects of prestress, support horizontal displacement and so on are discussed according the theoretical formulas presented. The results can provide references for research and enzineerinz fields.

关 键 词：张弦梁 楼盖 结构分析 力学性能 伽辽金法 

分 类 号：TU311[建筑科学—结构工程] TU393.3