(1 北京建工集团有限责任公司, 北京 100055; 2 河北省土木工程灾变控制与灾害应急重点实验室, 廊坊 065201; 3 华北科技学院建筑工程学院, 廊坊 065201; 4 江苏沪宁钢机股份有限公司,无锡 214231)

摘要: 北京工人体育场改造工程中屋盖采用大跨度开口单层拱壳钢结构,安装高度很高,需要设置临时支撑. 结构安装完成后需对下部布置的压力环桁架安装支撑结构进行整体卸载. 为确保整个结构卸载后,平稳地从支撑状态向结构自身承受荷载的状态过渡,采取分区分级对称卸载方法,制定了临时支撑的卸载方案,通过 MIDAS Gen 软件对卸载过程中钢屋盖结构和支撑等的变形和受力情况进行了计算,并对卸载过程中内环梁上的变形进行了监测. 结果表明:临时支撑卸载方案可行,结构、支撑等在卸载过程中的变形和受力都满足规范要求. 实际监测数据与数值模拟结果差距较小,说明结构整体施工质量控制较好,也证明了施工模拟分析的准确性.

关键词: 北京工人体育场; 大跨度开口屋盖; 临时支撑卸载; 施工模拟

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2023)06-0026-05

DOI:10. 19701 / j. jzjg. ZJ220104

Research on unloading technology of large-span open single-layer arch shell steel roof of Beijing Workers Stadium

HUANG Zhongying1, WANG Meng1, CAO Wei2,3, YAN Qinlong4

(1 Beijing Construction Engineering Group Co. , Ltd. , Beijing 100055, China; 2 Hebei Key Laboratory of CivilEngineering Catastrophe Control and Disaster Emergency Response, Langfang 065201, China; 3 Architectural EngineeringCollege, North China Institute of Science and Technology, Langfang 065201, China; 4 Jiangsu Huning Steel Structure &Machinery Co. , Ltd. , Wuxi 214231, China)

Abstract: In the reconstruction project of Beijing Workers Stadium, a large-span open single-layer arch shell steel structureis adopted for the roof. The installation height is very high, and temporary support is required. After the installation of thestructure, the installation support structure of the pressure ring truss arranged below shall be unloaded as a whole. In orderto ensure that the whole structure can smoothly transition from the supporting state to the state that the structure bears theload after unloading,the method of zonal and hierarchical symmetrical unloading was adopted, and the unloading scheme ofthe temporary support was develops. The deformation and force of the steel roof structure and the support during theunloading process were calculated through MIDAS Gen software, and the deformation of the ring beam during the unloadingprocess was monitored. The results show that the unloading scheme of the temporary support proposed is feasible, and thedeformation and force of the structure and support during the unloading process meet the specification requirements. Thegap between the actual monitoring data and the numerical simulation results is small, which indicates that the overallconstruction quality control of the structure is good, and also proves the accuracy of the construction simulation analysis.

Keywords:Beijing Workers Stadium; large-span open roof; unloading of temporary support; construction simulation

∗河北省省级科技计划资助(22375410D).

第一作者:黄中营,学士,高级工程师,主要从事土建施工技术等方面研究,Email:157266903@ qq. com.

[引用本文] 黄中营,王猛,曹伟,等. 北京工人体育场大跨度开口单层拱壳钢屋盖卸载技术研究[ J]. 建筑结构,2023,53(6):26-30. HUANG Zhongying,WANG Meng,CAO Wei,et al. Research on unloading technology of large-spanopen single-layer arch shell steel roof of Beijing Workers Stadium[J]. Building Structure,2023,53(6):26-30.