某既有网架支座弹性刚度取值研究  

Analysis onbearing elastic stiffness of an existing grid frame

作　　者：郑景昌 ZHENG Jingchang

机构地区：[1]福建建工集团有限责任公司,福建福州350001

出　　处：《福建建设科技》2023年第6期33-36,共4页Fujian Construction Science & Technology

摘　　要：为解决网架计算分析中支座约束状态的设置问题,以一既有网架为例,通过YJK-GAMA和3D3S进行了快速建模,考虑恒荷载、风荷载和温度荷载,研究5种不同的支座约束条件对网架变形、支座反力和杆件内力的影响。研究结果表明:网架支座约束状态对于网架结构变形、受力有很大的影响;分部建模与整体建模的计算结果相比有一定偏差,建议采用整体建模进行计算分析;当采用分部建模计算时,单独采用模型2或者模型3的杆件内力结果进行设计都会导致部分杆件承载力不足,应取内力包络值来进行设计。To simulate the constraint state of supports in the analysis of grid structures,an existing grid structure as an example was modeled and analyzed using YJK-GAMA and 3D3S.The dead load,wind load,and temperature load were applied to the grid structure,and the deformation,support reaction,and internal force were studied under five different support constraint conditions.The results of the study show that the constraint state of the grid support has a significant impact on the deformation and internal force of the grid structure.When using a step-by-step calculation,using the internal force results of model 2 or model 3 alone for design will lead to insufficient bearing capacity for some members,so the internal force envelope value should be used for design.

关 键 词：网架 支座刚度 YJK-GAMA 橡胶支座 

分 类 号：TU356[建筑科学—结构工程]