混凝土浇筑顺序对高大模板支撑体系稳定性影响  

Study on Influence of Concrete Pouring Sequence on Stability of High-Formwork Support System

作　　者：刘莉[1] 王芳[1] 王博[1] 王聚超 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2014年第1期115-119,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(10902073);住房和城乡建设部科学计划项目(2010-1-172);沈阳市城乡建设委员会项目(sjw2012-03)

摘　　要：目的研究混凝土浇筑顺序对高大模板支撑体系稳定性影响,为《建筑施工模板安全技术规范》JGJ162-2008修订提供依据,为施工方案设计提供参考.方法笔者结合高大模板试验,利用ABAQUS有限元分析软件模拟其受力性能.探讨模板体系在施工过程中,混凝土浇筑顺序对架体整体稳定性的影响.结果数值模拟与试验结果吻合良好,验证了该计算模型的正确性.分析得到在非对称浇筑混凝土过程中,立杆内力发生突变,架体水平侧移达到14.647 mm,而在对称浇筑混凝土过程中,架体水平侧移只有0.992 mm.结论建立的有限元模型可以较好地模拟高大模板支撑体系受力性能.采用非对称方式浇筑混凝土将会使高支模架体产生较大侧移,立杆受力不均,不利于架体整体稳定性.混凝土浇筑顺序在高支模体系中不可忽略.建议采用对称方式浇筑混凝土,提高架体整体稳定性.The purpose of this paper is to study influence of concrete pouring sequence on stability of high- formwork support system and provide basis for Safety Technical Code for Building Construction Template JGJ162-2008 and provide reference for the design of construction scheme. Based on formwork model tests and finite element software ABAQUS, the high-formwork stress performance is simulated, and influence of concrete pouring sequence on stability of high-formwork support system in the construction process is dis- assed. The results demonstrated that the simulation and the test date match well, and then verify the correct- ness of the calculation model. It shows that during the process of pouring concrete, vertical rod internal force mutation, the lateral displacement of the body reached 14. 647 mm while the value is only 0. 992 mm during the symmetry in the pouring process. The finite element model can simulate the stress performance of high formwork support system well. The asymmetric mode of concrete pouring will make high formwork support body produce larger lateral, vertical rod uneven stress, it isn＇t conducive to the overall stability of the frame body. Pouring sequence of concrete can not be ignored in high formwork system. In order to improve the o- verall stability of the frame body.the symmetrical concrete nouring way is recommended.

关 键 词：高大模板 有限元分析 混凝土浇筑顺序 整体稳定性 

分 类 号：TU755.2[建筑科学—建筑技术科学]