摘要
本文提出平面张弦结构的一种新形式,其下弦索上凹,上弦拱与下弦索之间用竖向拉杆连接,并命名为"拱形张弦拱"。建立索与拱的变形协调方程,导出索力增量与位移关系,用连续化方法给出拱形张弦拱的整体平衡微分方程,采用伽辽金法求得解析解,并与模型试验、非线性有限元分析进行分析比较,证明本文提出的理论公式计算方便、直观精确,可用于拱形张弦拱的分析与计算。对拱形张弦拱的静力性能进行了讨论,包括结构的线性性能、上弦拱的弯曲刚度贡献、挠度与支座水平位移、预应力对结构的影响等方面,对该结构的研究与工程应用有较好的指导意义。
A new type of plane string structures （PSS）--arched string structure with upward-curved cable （ASSUC） is proposed, which has concave-upward cable, the arch and the cable connect with vertical tension rods. The compatibility formula of deformation is established for the arched and the suspend cable, the relation of increment of cable force and displacement function is derived, and the equilibrium differential equation of structure is given with continuum method. The equation is solved by Galerkin method, and the analytical solutions are obtained. According to the comparison of the continuum method to the model test and nonlinear FEM, it is proved that the continuum method is convenient and intuitive with good precise, and can be applied for the analysis and design of practical ASSUC. The static behavior of ASSUC is discussed, it includes several aspects： the linearity behavior of ASSUC, the effect caused by the bending rigidity of arch, the deflection and the horizontal movement at the support end, the influence of the prestress process etc. The results are instructive for research and engineering fields of ASSUC.
出处
《建筑科学》
CSCD
北大核心
2015年第3期7-13,共7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)
关键词
拱形张弦拱
伽辽金法
结构分析
静力性能
arched string structure with upward-curved cable （ASSUC）
Galerkin method
structural analysis
static behavior
