预应力混凝土连续梁桥施工控制及力学分析

发布时间：2018-01-09 03:04

本文关键词：预应力混凝土连续梁桥施工控制及力学分析　出处：《兰州交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：预应力混凝土连续梁桥受力合理,最大限度的利用了混凝土的抗压性能和预应力钢筋的抗拉性能,节省材料,行车舒适,因此在百米左右跨径的桥梁选型中,是一种很有竞争力的方案。本文以实际工程建设为依托,对施工控制的计算及实施各个环节进行了详细研究。首先阐述了预应力混凝土连续梁桥的发展及施工方法,在此基础上简述了施工控制技术的意义,然后对施工控制的目的和原则、基本原理、计算分析方法进行了分析。施工控制的目的是使成桥线形和内力状态尽可能的达到设计要求,要达到这一目标,必须考虑控制过程中的各种影响因素,包括结构参数、施工工艺及监控误差、模型计算误差、施工管理和温度、混凝土收缩徐变等。在此基础上,建立MIDAS有限元模型,进行施工过程计算分析,求出各阶段应力和变形数据,为施工控制做准备。然后详述了桥梁施工过程中变形、内力等要素的监测方案,最后在成桥之后将得到的结果与设计值进行比较,结果证明经过施工控制,主梁内力和结构变形均得到了较好的控制,大桥施工全过程属于受控状态,结构各项成桥指标表现良好,证明了控制方法的正确性。本文所用原则和方法,可以为后续类似工程提供参考。
[Abstract]:Prestressed concrete continuous girder bridge, reasonable stress, to maximize the use of the tensile properties, concrete compressive strength and prestressing steel material saving, comfortable driving, so the bridge span in the selection of one hundred meters, is a competitive scheme. Based on the actual engineering construction based on the calculation of construction control and the implementation of each link is studied. Firstly, this paper expounds the development and construction method of prestressed concrete continuous girder bridge, based on the construction control technology and then the significance, purpose and principle of the construction control of the basic principle and calculation method are analyzed. The construction of the control objective is to make the bridge alignment and the internal force state as far as possible to meet the design requirements, to achieve this goal, we must consider the various factors in the control process, including structure parameters, construction technology and monitoring error, The model calculation error, construction management and temperature, shrinkage and creep of concrete. On this basis, MIDAS finite element model is established to calculate and analysis the construction process, for each stage of the stress and deformation data, preparing for the construction control. Then described the deformation in the process of bridge construction, the internal force monitoring scheme and other factors, at last in the bridge after the results and design values are compared, results show that after the construction control, the internal force and deformation of girder structure has obtained good control, bridge construction process belongs to the controlled state, the bridge structure index is good, to prove the correctness of the control method. The principle and method of this paper can be used. Provide a reference for future similar projects.

【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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