榫卯式满堂支撑体系承载力试验及非线性后屈曲分析  

Experimental Study of the Ultimate Bearing Load of the Full-hall Formwork Support System with the Mortise and Tenon Frame Joints and its Nonlinear Post-buckling Analysis

作　　者：刘杰[1] 何小涌 刘群[2] 赵海瑞 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]中国建筑科学研究院,北京100013 [3]天津迅安嘉会建材技术有限公司,天津300457

出　　处：《结构工程师》2015年第4期147-156,共10页Structural Engineers

摘　　要：简要介绍了新型榫卯式满堂支撑体系,实施了11个高度超过8 m足尺原型试验。定量地分析了立杆间距、横杆步距在有无剪刀撑的情况下对支撑体系极限承载力影响规律及竖向剪刀撑对支撑体系的极限承载力的影响。基于试验结果建立了包括节点半刚性、节点刚性的两种相对精细化的有限元分析模型并进行了考虑初始缺陷的非线性后屈曲分析。与试验结果进行比较,得出半刚性模型的有效性及节点刚性模型相对于工程实践偏于不安全的结论。在有限元分析中发现节点半刚性和节点刚性模型的荷载随位移变化规律截然不同,得出此种变化规律能够更好地反映结构的刚度特性和失效模式的结论。This paper briefly introduced the full-hall formwork support system with the Mortise and Tenon Frame Joints and conducted 11 full-scale prototype test with the height of more than 8m.The pole spacing and bar-step’s influence on the new type support system’s ultimate bearing capacity with or without X-bracing were analyzed.The X-bracing’s effects on the new type support system’s ultimate bearing capacity were studied.Two FEM models with semi-rigid joints and rigid joints were developed based on the experimental displacement results to perform nonlinear post-buckling analyses. FEM results were compared with experimental data and the results verified that the semi-rigid joints model is feasible but the rigid joints analysis model was unsafe for engineering practice.It was found during FEM analyses that there is difference for the load-displacement curve between the semi-rigid and rigid joints model and such difference could reflect the analysis model’s stiffness characteristic and failure mode.

关 键 词：榫卯支撑体系 试验研究 节点半刚性 非线性后屈曲分析 

分 类 号：TU312[建筑科学—结构工程] TU731.2