楼梯钢支撑体系力学性能有限元分析

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【中图分类号】：TU392 【文献标志码】：A 【文章编号】：008-397（2025）02-59-03

【DOI编码】：0.3969/j.issn.008-397.2025.02.03

Finite Element Analysis of Mechanical Properties of Staircase Steel Supporting System

GUO Shichao1，WANGJin1，HUANGKeqi1，LINGHuyan2，LIU Xiaomin1，ZHANGQian1 （1.ChinaConstructionSixthEngineringDivisionCo.Ltd.，Tanjin3o71，China；2.ChinaStateSilkRoadConstructionInstet Group Co.Ltd.，Xi'an710075，China）

【Abstract】： Inorder to realizethegoalof low-carbonenvironmentalprotection and greenconstruction，thispaper proposes a kind of steel supporting system for staircases.Considering two different working conditions of normal use limit state and loadcapacity limit state，midas Gen finite element software was used to calculate the basic mechanical propertiesof the supporting system.The anti-fatigue performance of the structure and the influence of different initial defects on the fatigue lifeof the structure were analyzed byABAQUSandFRANC 3D.The results show that： 92.6% of the structural components have a stress ratio lower than O.2，and the structural safetymargin is sufficient.Themaximumstress amplitudeof the structure is42.1 MPa，there will be no fatigue damage under 2 million times ofcyclic loading.Thefatigue lifeof astructure decreases as the initial defects inthe weld increase，so the qualityof welds in hazardous areas should be inspected before construction.

【Key words】： staircase； steel supporting system；mechanical property；fatigue property

我国房建工程中普遍应用的模板脚手架支撑体系存在很多安全隐患，主要表现在材料、施工过程等方面l。（剩余3643字）