摘要
直接分析法作为基于二阶非线性分析的高等分析方法,可以真实的反映出结构的初始缺陷、节点半刚性、结构和材料的非线性行为,反映出更准确的结构内力.扣件式钢管模板支架作为细长临时支撑结构,针对其杆件和连接非线性行为显著、明显的二阶效应、初始缺陷较大等特点,采用直接分析法对扣件式钢管模板支架设计,可获取更准确的整架体系非线性行为和失效模式,在设计过程中即可考虑失效后果.通过对结构整体缺陷、构件缺陷和节点半刚性的定量化讨论,并利用SAP2000软件对在构件初始缺陷、节点半刚性和二阶效应耦合作用下的扣件式钢管模板支架进行直接分析法分析,其分析结果与试验结果对比分析表明:采用直接分析理论得到的结果与试验数据相吻合,说明了直接分析法在扣件式钢管模板支架内力计算的准确可靠,在扣件式钢管模架体系稳定设计中具备适用性,为制定相关规范提供新思路.
As an advanced analysis method based on second-order nonlinear analysis,the direct analysis method can truly reflect the initial defects of the structure,the semi-rigidity of the joint,the nonlinear behavior of the structure and the material,and reflect the more accurate internal forces of the structure.As a slender temporary support structure,coupler-style steel tubular formwork support has the characteristics of significant nonlinear behavior of bars and connections,obvious second-order effect and large initial defects.So,the direct analysis method can be used to design coupler-style steel tubular formwork support to obtain more accurate nonlinear behavior and failure modes of the entire frame system,and the failure consequences can be considered in the design process.Based on the quantitative discussion of the overall defects of the structure,the defects of the component and the semi-rigidity of the joint,the direct analysis method is used to analyze coupler-style steel tubular formwork support under the coupling action of initial defects of the component,the semi-rigidity of the joint and second-order effect by means of SAP2000 software,and then the analysis results are compared with the test results.The results show that the results obtained by using the direct analysis theory are consistent with the test data,which indicates that the direct analysis method is accurate and reliable in the calculation of the internal forces of the coupler-style steel tubular formwork support,and has applicability in the stable design of coupler-style steel tubular formwork supports system,and provides a new idea for the formulation of relevant codes.
作者
曾凡奎
张君策
王金鑫
范玉川
胡长明
ZENG Fankui;ZHANG Junce;WANG Jinxin;FAN Yuchuan;HU Changming(School of Civil&Architecture Engineering,Xi′an Technological University,Xi′an 710021,China;School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China)
出处
《西安建筑科技大学学报（自然科学版）》
北大核心
2021年第4期472-478,共7页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家重点研发计划(2021YFF0306301)。
关键词
扣件联接钢结构
直接分析法
稳定性分析
初始缺陷
二阶效应
coupler-style steel tubular formwork supports
direct analysis
stability analysis
initial defects
second order effect
