高对称预应力索杆体系的新型力密度分析法  

New Force Density Analysis Method for Highly Symmetric Prestressed Cable System

作　　者：孙逸夫 宫鹏飞 杨瑞臻 孙悦 倪越 Sun Yi-fu;Gong Peng-fei;Yang Rui-zhen;Sun Yue;Ni Yue

机构地区：[1]东南大学土木工程学院

出　　处：《建筑技术开发》2019年第15期21-23,共3页Building Technology Development

摘　　要：索杆张拉整体结构是一种自平衡的结构,在设计的过程中,最重要的是确定结构的几何拓扑形状和初始内力状态,即找形分析。在传统力密度找形方法的基础上,对高对称索杆结构找形进行简化,使其能充分利用结构的高对称性。通过算例表明,对高对称索杆结构,简化后的找形方法运用力密度法建立围绕基准点x,y,z方向的力平衡方程,找出其余节点相对于基准点的转换关系,对维度较小的力密度矩阵进行分析,可以直接求得结构各杆件的力密度关系及节点坐标,使计算更加简洁、高效。The overall structure of the cable-stayed tension is a self-balancing structure.In the design process,the most important thing is to determine the geometric topological shape and initial internal force state of the structure,that is,the shape-finding analysis.Based on the traditional force density finding method,this paper simplifies the shape finding of high symmetry rope bar structure,so that it can make full use of the high symmetry of the structure.The example shows that for the high symmetry cable-rod structure,the simplified shape-finding method uses the force density method to establish the force balance equation around the reference point in the x,y,and z directions,and find out the conversion relationship of the remaining nodes with respect to the reference point.The analysis of the force density matrix with smaller dimensions can directly obtain the force density relationship and the node coordinates of each member of the structure,which makes the calculation more concise and efficient.

关 键 词：高对称 索杆体系 找形方法 

分 类 号：TU974[建筑科学—建筑技术科学]