教子川曲线连续刚构桥沥青混凝土桥面铺装受力特性分析及施工工艺研究

发布时间：2018-03-03 00:06

本文选题：连续刚构桥　切入点：桥面铺装　出处：《北京交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：摘要：连续刚构桥具有结构合理、施工方便等优点,在高速公路与城市道路中大量兴建。目前,国内连续刚构桥桥面铺装病害问题较为突出,降低了桥梁的舒适性与耐久性。本文主要从桥面铺装受力特性与施工工艺两个方面针对连续刚构桥的沥青混凝土桥面铺装展开研究。首先,以甘肃教子川曲线连续刚构桥为工程依托,建立全桥有限元模型,计算得到最不利梁段,由此建立局部有限元模型对桥面铺装进行分析。接着,考虑桥面铺装在温度作用、混凝土收缩徐变作用下的受力；之后,重点考虑在车辆超载、水平制动力、行车速度、桥面铺装层厚度与沥青混合料弹性模量的变化下桥面铺装应力的变化规律。结果表明,温度作用和车辆荷载的荷载组合对桥面铺装影响最大。在前述分析的基础上,对连续刚构桥沥青混凝土桥面铺装在桥面界面处理、粘结层施工、沥青混合料的温度控制等方面的施工工艺做出了细化规定与建议,为保证同类桥梁沥青混凝土桥面铺装的施工质量提供了有价值的参考。
[Abstract]:Abstract:. Continuous rigid frame bridge has the advantages of reasonable structure and convenient construction. It is widely built in expressway and city road. At present, the problem of pavement disease of continuous rigid frame bridge in China is more prominent. This paper mainly studies the asphalt concrete deck pavement of continuous rigid frame bridge from the two aspects of bridge deck pavement characteristics and construction technology. First of all, based on the continuous rigid frame bridge of Zizichuan Curve in Gansu Province, the finite element model of the whole bridge is established, and the most disadvantageous beam segment is calculated, and then the local finite element model is established to analyze the pavement of the bridge deck. Considering the stress of bridge deck pavement under the action of temperature, shrinkage and creep of concrete, and then focusing on vehicle overload, horizontal braking force, driving speed, Under the change of the thickness of deck pavement and the elastic modulus of asphalt mixture, the variation rule of pavement stress is obtained. The results show that the effect of temperature and load combination of vehicle load on deck pavement is the most important. On the basis of the above analysis, the construction technology of asphalt concrete deck pavement of continuous rigid frame bridge in the aspects of interface treatment, bond layer construction, temperature control of asphalt mixture and so on has been specified and suggested. It provides a valuable reference for ensuring the construction quality of asphalt concrete deck pavement of similar bridges.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.33

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