基于蒙特卡洛法的单层轮辐式索网结构制作安装误差影响分析  

Analysis on influence of manufacture and construction error on single-layer spoke cable net structure based on Monte Carlo method

作　　者：吴金志[1] 张祥 邵玉荣 孙国军[1] WU Jinzhi;ZHANG Xiang;SHAO Yurong;SUN Guojun(School of Civil Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《建筑结构》2025年第1期8-14,65,共8页Building Structure

基　　金：国家自然科学基金面上项目(51278009)。

摘　　要：单层轮辐式索网结构自重轻盈、造型优美,应用前景广泛,但发展时期不长,其结构设计理论体系仍有待完善。为了提高对单层轮辐式索网结构误差影响的认识,分析了制作安装误差因素对索网性能的影响。首先介绍了单层轮辐式索网的结构形式和采用拉丁超立方抽样的蒙特卡洛法。然后选取苏州工业园区体育场单层轮辐式索网屋盖,通过数值模拟的方法分析拉索长度、截面刚度和耳板坐标三种制作安装误差对该结构拉索索力、环索控制节点坐标和环梁应力等性能指标的影响程度,分析性能指标关于不同制作安装误差的敏感性。最后研究了制作安装误差在不同预应力水平下对索网结构预应力态性能指标的影响。研究结果表明,施工控制过程中需要重点监控环向索索力,对环向索长度误差的控制应比径向索更严格,最外侧下部的环索的弹性模量误差对结构性能指标影响也较为明显,适当提高结构的预应力水平可降低制作安装误差影响。The single-layer spoke cable net structure has the advantage of light-weight,elegant appearance and has wide application prospects,but the development period is not long,and its structural design theoretical system still needs to be improved.In order to improve the understanding of the single-layer spoke cable net structure,the influence of the manufacture and construction error factors on the performance of the cable net was analyzed.Firstly,the single-layer spoke cable net structure and the Monte Carlo method using Latin hypercube sampling were introduced.Secondly,the single-layer spoke cable net roof of Suzhou Industrial Park Stadium was selected to study.Numerical simulation was used to analyze the influence of three kinds of manufacture and construction errors,such as cable length,section stiffness and installation coordinates of ring beam,on the performance indicators such as cable force,node coordinates of loop cable and ring beam stress.The sensitivity of the performance indicators to the manufacture and construction errors was also analyzed.Finally,the influence of errors above on the performance index of cable structure under different prestress levels was studied.The research results show that in the process of construction control,it is necessary to monitor the loop cable force,and the control of the length error of the loop cable should be stricter than that of the radial cable.The elastic modulus error of the loop cable at the lower part of the outer side also has obvious influence on the performance index of the results.Properly increasing the prestress level of the structure can reduce the effect of manufacture and construction errors.

关 键 词：轮辐式索网结构 制作误差 安装误差 误差影响 灵敏度分析 蒙特卡罗法 

分 类 号：TU394[建筑科学—结构工程]