Key Technologies for Construction and Monitoring of Large Span Steel Structures in a University Gymnasium
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维普
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为控制大跨度复杂钢结构应力和变形,提高施工精度,以辽宁省抚顺市某高校体育馆为研究对象,在分析大跨度钢结构的施工关键技术基础上,采用内环梁分段安装、主拱肋采用整根吊装的施工方案.起重设备为1 250 t履带吊,引入施工无线监测系统对结构内力和变形进行监测.系统主要由无线传感器子系统、实时数据采集子系统、无线网络传输子系统和移动终端数据处理及预警子系统组成.结果表明,引入的施工无线监测可实现施工阶段关键构件结构内力、变形和温度的实时远程监测;主拱肋应力随着时间呈现剧烈的变动,整体规律为先增加后降低再趋于稳定,主拱肋的位移呈现先增加后趋于稳定的变化趋势,最大应力为4.9 MPa,最大位移值为9.2 mm.
In order to control the stress and deformation of large-span complex steel structures and improve con-struction accuracy,a university gymnasium in Fushun City,Liaoning Province was taken as the research object.Based on the analysis of key construction technologies of large-span steel structures,a construction plan was adopted,which included segmented installation of inner ring beams and whole lifting of main arch ribs.The lifting equipment was a 1 250 t crawler crane,and a construction wireless monitoring system was introduced to monitor the internal force and deformation of the structure.The system mainly consists of a wireless sensor subsystem,a real-time data acquisition subsystem,a wireless network transmission subsystem,and a mobile terminal data processing and warning subsystem.The results indicate that the introduction of wireless monitoring in construction can achieve real-time remote monito-ring of the internal forces,deformations,and temperatures of key component structures during the construction phase.The stress of the main arch rib shows a drastic change over time,with an overall pattern of first increasing,then decrea-sing,and then stabilizing.The displacement of the main arch rib shows a trend of first increasing and then stabilizing,with a maximum stress of 4.9 MPa and a maximum displacement value of 9.2 mm.
large spansteel structureuniversity gymnasiumconstruction monitoringsegmented liftinginternal forcedeformation
维普
万方数据
