有限设备下索网幕墙张拉批次自动确定方法  

Automatic Determination Method for Tension Sequence of Cable Net Curtain Wall by Limited Equipment

作　　者：孟宇翔 洪重诺 庞存均 吴杰[2] MENG Yuxiang;HONG Zhongnuo;PANG Cunjun;WU Jie(CCCC Construction Group Co.,Ltd.,Beijing 100022,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]中交建筑集团有限公司,北京100022 [2]同济大学土木工程学院,上海200092

出　　处：《结构工程师》2025年第1期139-148,共10页Structural Engineers

基　　金：上海期智研究院科技合作项目(SQZ202310)。

摘　　要：针对索网幕墙施工时张拉设备数量和设备最大容许拉力均受限的情况,考虑柔性边界变形对拉索索力的影响,提出了一种索网结构张拉批次和张拉力自动确定方法。该方法通过温度改变索单元长度,进而模拟索网张拉过程,在设备数量及最大拉力均限定的条件下,通过优化迭代自动确定索网张拉批次和张拉力。以中交建筑集团上海总部大楼的拉索幕墙为工程案例,采用该方法进行了索网结构快速找力分析,确定了索网张拉批次和张拉力,并将计算结果与常规张拉方案进行了比较分析。结果表明:主体结构变形显著降低了拉索的索力值,找力和张拉过程分析必须考虑主体结构与索网的协同变形;与普通张拉方案相比,提出的张拉批次确定方法可充分利用现有设备,有效减少张拉批次,并确保张拉过程中索力不超过设备的最大容许拉力。Aiming at the situation that the number of tension equipment and the maximum allowable tension force of equipment are limited during the construction of cable net curtain wall,and considering the influence of flexible boundary deformation on the tension forces,an automatic determination method of tension sequences and tension forces for cable net structures is proposed.This method changes the length of cable elements by adjusting the cable temperature to simulate the tension process of cables.Under the specified condition of limited number of equipment and maximum tension force,the tension sequences and tension forces were determined automatically through optimization iterations.Taking the cable net curtain wall of the Shanghai headquarters building of CCCC Group as an engineering case,the method was employed to carry out force-finding analysis of cable net structure.The tension sequences and tension forces of the cable net were determined,and the calculation results were compared with the conventional tension scheme.The analytical results show that the deformation of the main structure significantly reduces the value of cable forces,and the analysis of the shape-finding and tensioning process must consider the synergistic deformation of the main structure and the cable net.Compared with the conventional tensioning scheme,the proposed method can fully utilize the existing equipment,and effectively reduce the tension groups,ensuring that the cable forces do not exceed the maximum allowable tension force during the tensioning process.

关 键 词：索网幕墙 找力分析 张拉顺序 温度 有限元分析 

分 类 号：TU712.1[建筑科学—建筑技术科学]