内外双重张弦网壳结构预应力施工仿真分析  

Simulation analysis of prestressed construction of double inner and outer latticed shell string structure

作　　者：苏英强 俞福利 刘中华 贾尚瑞 江涛 

机构地区：[1]浙江精工钢结构集团有限公司,浙江绍兴312030

出　　处：《空间结构》2014年第4期59-66,共8页Spatial Structures

摘　　要：内外双重张弦网壳结构是一种新型的预应力结构体系,主要由单层曲面网格结构和空间索桁体系复合而成.为了对体系的形成过程进行安全控制,有必要对结构进行详细的施工模拟分析,确定出合理的张拉顺序和张拉力控制值.本文以乐清体育中心体育馆内外双重张弦网壳结构屋盖为例,详细介绍循环迭代降温法在该索系找力分析的应用.文中利用找力分析得到的一系列温度数组对分阶段多批次分级预应力施工过程进行仿真模拟分析.分析结果表明:循环迭代降温法可以得到每级张拉所需索力施工张拉控制值.与一次张拉成型相比,采用分阶段多批次分级预应力施工方案,可以大大降低成本且满足工程精度要求.The double inner and outer latticed shell string structure is a new prestressed structure system, composed of single-layer surface grid structure and space cable truss system. In order to safely control the formation of system, it is necessary to make a detailed construction simulation analysis on the structure and determine the reasonable order of tensioning and tension control values. Taking double inner and outer latticed shell string structure roof of Yueqing sports center stadium as example, the loop iteration cooling method for force finding analysis of cable system is detailed introduced. Simulation analysis on the multistage prestressed construction process is conducted using a series of temperature set obtained. The analysis results show that the loop iteration cooling method can get control values of per level tensioning cable force as needed. Compared with one-off tensioning molding, the multi-stage prestressed construction can greatly reduce the cost and satisfy the requirements of engineering precision.

关 键 词：内外双重张弦网壳结构 找力分析 施工过程 仿真分析 

分 类 号：TU394[建筑科学—结构工程]