新型插盘式脚手架承载力影响因素分析  

Influence Factor Analysis on Bearing Capacity of New Disk-type Scaffold

作　　者：叶志燕[1] 张其林[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《施工技术》2009年第12期92-94,102,共4页Construction Technology

摘　　要：基于足尺试验得到的模型参数,建立新型插盘式脚手架的三维有限元模型。采用非线性分析方法研究几何形式和荷载类型对脚手架极限承载力的影响。分析表明:结构体系的第一阶屈曲模态为支撑屈曲;几何形式对新型插盘式脚手架体系的极限承载力有显著影响;三角形荷载作用下立杆的应力比大于矩形荷载和梯形荷载作用下的应力比;矩形荷载作用下的极限承载力大于梯形荷载和三角形荷载作用下的极限承载力。On the basis of parameters obtained from full-scale experiment,a 3D finite element model of new disk-type scaffold is set up.Nonlinear analysis is employed to determine the effects of geometrical shape and load patterns on ultimate bearing capacity of scaffold system.Computation and analysis show that the first buckling mode is support buckling,geometrical shape has obvious effect on the ultimate bearing capacity of new disk-type scaffold,the stress ratio under triangle load is larger than that under rectangle and trapezoid load,and the ultimate bearing capacity under rectangle load is larger than that under triangle and trapezoid load.

关 键 词：插盘式脚手架 三维有限元模型 几何形式 荷载类型 极限承载力 

分 类 号：TU731.2[建筑科学—建筑技术科学]