高大模板支架力学性能及连续倒塌机理研究

发布时间：2018-03-15 02:13

本文选题：高大模板　切入点：插卡式节点试验　出处：《北京交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着国家经济的发展,建筑师的设计逐步趋向高空间、大跨度结构,导致施工过程中会出现很多高大模板支撑系统,但由于缺乏对其性能的准确认识,施工过程中时有高大模板支撑系统破坏导致重大人员伤亡以及财产损失的案例发生。现有的监测设备主要为光学监测仪器,监控人员只能在支撑体系外监测,不能进入支撑架体内部,因此只能了解高支模外围情况而无法感知高支模内部的安全情况,导致发生危险时作业人员难以及时安全撤离危险区域。鉴于此,本文在对高大模板支撑系统的力学性能、连续倒塌的各项性能指标进行深入分析的基础上,使用高大模板支撑监测系统对其监测进行危险预警。本文的主要内容分为以下几个部分:(1)进行节点刚度试验,设计两种不同形式的试件对插卡型节点进行静力性能试验,拟合出其节点刚度的表达式,最后综合分析得到其完整节点的力学性能。(2)研究架体的力学性能,其中包括局部竖杆的压杆稳定研究与架体整体的承载能力研究,对不同位置、不同失稳形式的竖杆进行稳定性分析,结合架体整体的有限元模拟结果,提出竖杆承载力计算公式,基于此可以对架体的安全状态进行评估;并对架体构件重要性进行分析,确定影响构件重要性的主要因素,建立架体的连续倒塌机制,明确施工过程中应重点监测的对象。(3)将架体力学性能与连续倒塌分析的研究结果进行实际工程应用,测试研究结果应用于实际工程的可行性。
[Abstract]:With the development of national economy, the architect's design gradually tends to high space and large span structure, which leads to many large formwork support systems in the construction process, but due to the lack of an accurate understanding of its performance, During the construction process, there are some cases of heavy casualties and property losses caused by the destruction of large formwork support system. The existing monitoring equipment is mainly optical monitoring instruments, and the monitoring personnel can only monitor outside the support system. Cannot enter the body of the support frame, and therefore can only understand the outer condition of the high support mould and cannot perceive the safety situation inside the high support mould, which makes it difficult for the operator to evacuate the dangerous area safely in time in case of danger. In view of this, In this paper, the mechanical properties of the tall formwork bracing system and the various performance indexes of the continuous collapse are deeply analyzed. The main contents of this paper are divided into the following parts: 1) to carry out the joint stiffness test, and to design two different types of specimen to carry out static performance tests on the card type joints, and the main contents of this paper are as follows: (1) the main contents of this paper are divided into the following parts: 1) to carry out the joint stiffness test. Finally, the mechanical properties of the whole joint are obtained by synthetically analyzing the mechanical properties of the whole joint, including the study of the stability of the compression bar of the local vertical rod and the study of the bearing capacity of the whole frame. According to the finite element simulation results of the whole frame, a formula for calculating the bearing capacity of the vertical bar is put forward, based on which the safety state of the frame can be evaluated, and the importance of the member of the frame is analyzed. The main factors affecting the importance of the structure are determined, the continuous collapse mechanism of the frame is established, and the object that should be monitored in the construction process is determined. The research results of the mechanical properties of the frame and the analysis of the continuous collapse are applied in practical engineering. The test results are applied to the feasibility of practical engineering.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU755.2

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