弦支穹顶结构预应力施工模拟方法研究  

Research on Prestressing Construction Simulation for Suspendome Structures

作　　者：刘树堂[1] L IU Shutang(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《建筑钢结构进展》2016年第5期66-72,共7页Progress in Steel Building Structures

摘　　要：对于弦支穹顶结构预应力施工模拟分析,提出一种新的分析方法。基于结构施工态构形建立节点力非线性平衡方程,基于矩阵微分理论和牛顿切线法概念得到结构非线性平衡方程的线性逼近式,通过引入结构边界约束条件得到结构可动节点坐标迭代公式。给出的方法将施工张拉力或卸载压力视为外力直接施加于施工结构上,不需要将施工张力等效为初应变或初温差。使用该方法可有效考虑结构非线性特性、不同批次张拉施工的相互作用和临时支撑卸载施工。对一大型弦支穹顶结构算例进行了预应力施工模拟分析,验证了该方法的有效性。A new analysis method is proposed for the prestressing construction simulation of suspendome structures.A nonlinear equilibrium equation for the nodal force of structure is established based on the configuration of structural construction state.The linear expression for the nonlinear equilibrium equation of structure construction system is obtained based on the matrix differential theory and Newton＇s tangent concept.The iteration formula for movable node coordinate vector of the structure is obtained through introducing boundary conditions.In the proposed method,the loading tension or unloading compression in construction is applied as external force,rather than being equivalent to initial strain or initial temperature difference。Using this method,structural nonlinear properties,interactions of different batch tension construction and the unloading construction of temporary supports can be accounted.The prestressing construction simulation analysis is conducted for a large-scale suspendome structure,and the validity of proposed method is established.

关 键 词：弦支穹顶结构 预应力 施工模拟 

分 类 号：TU393.3[建筑科学—结构工程] TU745.2