碗扣式高大模板支撑体系稳定性分析

发布时间：2018-01-22 22:22

本文关键词： 碗扣式高支撑体系半刚性节点构造措施稳定承载力　出处：《辽宁工程技术大学》2014年硕士论文　论文类型：学位论文

【摘要】：碗扣式高支撑体系与扣件式高支撑体系相比不仅施工方便,而且承载力高、受力性能更加良好,因此在施工中得到广泛应用。本文以碗扣式高支撑体系为研究对象,从理论分析到有限元软件模拟,再到结合工程实际,对碗扣式高大模板支撑体系的稳定性进行系统研究,为实际施工提供依据。主要研究工作如下：(1)运用MATLAB应用程序对上碗扣拧紧力矩与碗扣节点初始刚度之间进行二阶及三阶拟合,并得到拟合曲线。(2)运用ANSYS有限元软件建立与实际支撑体系相对应的四种模型,分析模型中节点刚度变化时承载力的变化情况,并与实际支撑体系的承载力进行对比,得到了更能反映工程实际的碗扣式高支撑体系节点半刚性连接的分析模型。(3)计算分析碗扣式高支撑体系的构造条件,如横杆步距、立杆间距、剪刀撑的设置以及天杆和扫地杆高度等因素对高支撑体系稳定承载力的影响,供实际施工状态下高支撑体系的搭设参考。(4)运用有限元软件ANSYS建立4跨×4跨×6步碗扣式模板支撑体系在不同剪刀撑布置情况下的四种模型,通过对模拟结果进行分析,总结模型中立杆、横杆以及剪刀撑杆件的应力变化规律,以及模型中节点Z向和X向位移变化情况。(5)依托阜新市规划博物馆具体工程,对工程中800mm X 2000mm大型预应力梁下碗扣式高大模板支撑体系进行有限元建模,通过对模型分次加载模拟实际高支撑体系在施工中的受力变形情况。分析模型中节点的位移值及杆件应力值,确保实际高支撑体系稳定、可靠,保证施工安全。
[Abstract]:Compared with the fastener high support system, the bowl high support system is not only convenient for construction, but also has high bearing capacity and better mechanical performance. Therefore, it is widely used in construction. This paper takes the bowl-button high support system as the research object, from theoretical analysis to finite element software simulation, and then to the combination of engineering practice. The stability of the support system of bowl fastener high formwork was studied systematically. The main research work is as follows: 1) the second order and third order fitting between the tightening torque of the upper bowl and the initial stiffness of the joint is carried out by using the MATLAB application program. Four models corresponding to the actual bracing system are established by using the ANSYS finite element software, and the change of bearing capacity when the node stiffness changes in the model is analyzed. And compared with the actual bearing capacity of the bracing system. The analysis model of semi-rigid connection of bowl-button-type high support system is obtained, which can reflect engineering practice more.) the structural conditions of bowl button-type high support system are calculated and analyzed, such as walking distance of horizontal bar and spacing of vertical rod. The influence of the setting of scissors brace and the height of sky pole and sweeping pole on the stability bearing capacity of high bracing system. This paper provides a reference for the erection of high support system in actual construction. Using finite element software ANSYS, four kinds of models of four-span 脳 4-span 脳 6-step bowl button-type support system under different conditions of shear-brace arrangement are established. Through the analysis of the simulation results, the stress changes of the vertical rod, the horizontal bar and the scissors brace in the model are summarized. And the model of Z-direction and X-direction displacement changes. 5) based on the Fuxin City planning museum specific projects. In this paper, the finite element model of the supporting system of large bowl-button-type formwork under 800mm X 2000mm large prestressed beam in the project is established by finite element method. The stress and deformation of the actual high bracing system are simulated by model loading, and the displacement of the node and the stress of the member in the model are analyzed to ensure the stability, reliability and construction safety of the actual high bracing system.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU755.2

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