建筑施工钢管脚手架非线性分析及现场实测验证  

NONLINEAR ANALYSIS AND FIELD TEST VERIFICATION OF STEEL TUBULAR SCAFFOLDS UNDER CONSTRUCTION

作　　者：李朝阳[1,4] 潘新忠 余波[1,2,3] LI Zhaoyang;PAN Xinzhong;YU Bo(School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Key Laboratory of Engineering Disaster Prevention and Structural Safety of Ministry of Education,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,Nanning 530004,China;Guangxi Polytechnic of Construction,Nanning 530007,China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]工程防灾与结构安全教育部重点实验室,南宁530004 [3]广西防灾减灾与工程安全重点实验室,南宁530004 [4]广西建设职业技术学院,南宁530007

出　　处：《工业建筑》2020年第9期112-117,共6页Industrial Construction

基　　金：国家自然科学基金项目(51668008,51738004);广西自然科学基金项目(2018GXNSFAA281344)。

摘　　要：为合理分析钢管脚手架的受力性能,建立了能够同时考虑二阶效应和节点非线性半刚性连接影响的钢管脚手架非线性分析模型,并结合现场实测试验对非线性分析模型进行了有效性验证,进而基于非线性分析模型分析了立杆间距、水平杆步距和水平荷载等关键因素对钢管脚手架内力和位移的影响规律。分析结果表明:所建立的钢管脚手架非线性分析模型的计算结果与试验数据吻合较好,说明该模型的计算精度较高;对于高宽比较小的普通扣件式和承插型键槽式钢管支撑脚手架,非线性半刚性连接和二阶效应的耦合影响不显著;对于高宽比较大的钢管脚手架,半刚性连接的非线性影响不显著。In order to investigate the mechanic properties of steel tubular scaffold(STC),a nonlinear numerical analysis model of the STC based on the beam-column method considering the second-order effect and the nonlinear semi-rigid connection was proposed.Meanwhile,the efficiency and applicability of the presented method was validated by comparing with the results of the field test for the STCs.Finally,the internal forces and the displacements of the STC varying with some parameters(e.g.span of the vertical poles,story height,horizontal load)was studied with the proposed model.The results showed that the proposed model was of high accuracy,since the results produced by the proposed model were well agreement with that of the field test.Furthermore,the mechanic properties of the STC with small ratio of height to width was not influenced by coupling of the second-order effect and the nonlinear semi-rigid connection,and the mechanic properties of the STC with large ratio of height to width was not affected by the nonlinear semi-rigid connection.

关 键 词：钢管脚手架 梁柱法 半刚性连接 二阶效应 现场试验 

分 类 号：TU731.2[建筑科学—建筑技术科学]