摘要
国内外大跨空间结构大多为采用索和膜的结构体系,而索膜结构作为一种新型柔性建筑结构,结构有了预应力的施加,才能形成具有一定刚度的初始形态,并能承受外部荷载,因此找形分析是这类柔性建筑结构的整个设计过程中的关键步骤之一。因此,本文对国内外索膜结构的找形方法总结整理,介绍各种方法的起源、应用以及发展创新情况,发现力密度法、动力松弛法和非线性有限元法是目前广泛用于索膜结构的找形方法。这三种方法都有优缺点,针对传统找形方法的缺点,不少学者进行了改进优化及创新。有的学者将几种方法进行结合,以弥补彼此的缺点;有的学者将在传统找形方法的基础上引入算法,得到更为精确地找形结果。
Most of the large-span spatial structures at home and abroad are structural systems using cables and membranes.As a new type of flexible building structure,the cable-membrane structure has the application of prestress to form an initial shape with certain stiffness and can withstand external loads.Therefore,form-finding analysis is one of the key steps in the entire design process of such flexible building structures.Therefore,this paper summarizes the form-finding methods of cable-membrane structures at home and abroad,introduces the origin,application,development and innovation of various methods,and finds that force density method,dynamic relaxation method and nonlinear finite element method are widely used in form-finding methods of cable-membrane structures.These three methods have advantages and disadvantages.In view of the shortcomings of traditional form-finding methods,many scholars have improved,optimized and innovated.Some scholars combine several methods to make up for each other's shortcomings;some scholars have introduced algorithms on the basis of traditional form-finding methods to obtain more accurate form-finding results.
作者
喀则·吾鲁格
薛素铎
李雄彦
WULUGE Kaze;XUE Suduo;LI Xiongyan(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《建筑结构》
北大核心
2023年第S01期488-492,共5页
Building Structure
关键词
索膜结构
找形分析
非线性有限元法
动力松弛法
力密度法
cable-membrane structure
form-finding analysis
nonlinear finite element method
dynamic relaxation method
force density method
