液体橡胶基混凝土的桥梁伸缩装置研究与开发
发布时间：2018-09-13 09:13
【摘要】：桥梁伸缩装置是桥梁结构的重要组成部分，也是薄弱环节之一，它直接承受车辆荷载和环境等因素的反复作用，其性能好坏直接影响桥梁结构的健康和行车效果。液体橡胶基混凝土（Liquid Rubber Based Concrete，LRBC）是一种潜在的桥梁伸缩装置接缝材料，这种材料具有一定的优越性。本文主要围绕液体橡胶基混凝土材料的力学性能以及桥梁伸缩装置的结构形式展开研究，具体工作如下： （1）研究设计了适用于桥梁伸缩装置的LRBC优化配合比。通过准静态抗折与压缩试验，得到了满足桥梁伸缩装置接缝材料力学性能要求的优化配合比，在此基础上对择优化配合比的LRBC进行了不同温度下准静态压缩试验，分析了LRBC压缩强度受温度影响的规律。 （2）通过拉伸试验对不同温度环境的液体橡胶（Liquid Rubber，LR）与混凝土界面粘结性能进行了测试，得到了不同温度下界面粘结应力-应变曲线，研究了界面粘结性能受温度影响的规律； （3）研究了无缝式桥梁伸缩装置的工作原理，，主要是依靠弹塑体的变形适应桥梁所产生的位移，同时达到对车轮承载的目的；着重分析了伸缩装置接缝材料安装宽度和伸缩量之间的关系，并对桥梁伸缩装置的结构尺寸进行了初步设计。通过对桥梁伸缩装置的数值模拟，分析了LRBC用于不同结构形式伸缩装置的应力分布，优化了伸缩装置结构形式。数值计算结果表明，LRBC的力学性能和优化的伸缩缝结构形式能满足工程要求。 （4）对伸缩装置施工工艺进行研究与说明，提出了改进措施。
[Abstract]:Bridge telescopic device is an important part of bridge structure and one of the weak links. It directly bears the repeated action of vehicle load and environment, and its performance directly affects the health and driving effect of bridge structure. Liquid rubber based concrete (Liquid Rubber Based Concrete,LRBC) is a potential joint material for bridge expansion and expansion devices, which has some advantages. This paper mainly focuses on the mechanical properties of liquid rubber based concrete material and the structural form of bridge expansion device. The main work is as follows: (1) the LRBC optimum mix ratio suitable for bridge expansion and expansion device is studied and designed. Based on the quasi static bending and compression tests, the optimized mix ratio is obtained to meet the requirements of the mechanical properties of the joints of bridge telescopic devices. On this basis, quasi-static compression tests at different temperatures are carried out to select the optimal mix ratio of LRBC. The effect of temperature on the compressive strength of LRBC was analyzed. (2) the interfacial bond properties of liquid rubber (Liquid Rubber,LR) and concrete at different temperatures were tested by tensile test. The stress-strain curves of interfacial bonding at different temperatures are obtained, and the influence of temperature on interfacial bond properties is studied. (3) the working principle of seamless bridge expansion device is studied. It mainly depends on the deformation of elastic-plastic body to adapt to the displacement produced by the bridge, and at the same time to achieve the purpose of bearing the wheel, the relationship between the installation width and the expansion quantity of the joint material of the telescopic device is analyzed emphatically. At the same time, the structure size of the bridge telescopic device is preliminarily designed. Through the numerical simulation of the bridge telescopic device, the stress distribution of the telescopic device used in different structure forms by LRBC is analyzed, and the structure form of the telescopic device is optimized. The numerical results show that the mechanical properties of LRBC and the optimized expansion joint structure can meet the engineering requirements. (4) the construction technology of the telescopic device is studied and explained, and the improvement measures are put forward.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.31
本文编号：2240719
[Abstract]:Bridge telescopic device is an important part of bridge structure and one of the weak links. It directly bears the repeated action of vehicle load and environment, and its performance directly affects the health and driving effect of bridge structure. Liquid rubber based concrete (Liquid Rubber Based Concrete,LRBC) is a potential joint material for bridge expansion and expansion devices, which has some advantages. This paper mainly focuses on the mechanical properties of liquid rubber based concrete material and the structural form of bridge expansion device. The main work is as follows: (1) the LRBC optimum mix ratio suitable for bridge expansion and expansion device is studied and designed. Based on the quasi static bending and compression tests, the optimized mix ratio is obtained to meet the requirements of the mechanical properties of the joints of bridge telescopic devices. On this basis, quasi-static compression tests at different temperatures are carried out to select the optimal mix ratio of LRBC. The effect of temperature on the compressive strength of LRBC was analyzed. (2) the interfacial bond properties of liquid rubber (Liquid Rubber,LR) and concrete at different temperatures were tested by tensile test. The stress-strain curves of interfacial bonding at different temperatures are obtained, and the influence of temperature on interfacial bond properties is studied. (3) the working principle of seamless bridge expansion device is studied. It mainly depends on the deformation of elastic-plastic body to adapt to the displacement produced by the bridge, and at the same time to achieve the purpose of bearing the wheel, the relationship between the installation width and the expansion quantity of the joint material of the telescopic device is analyzed emphatically. At the same time, the structure size of the bridge telescopic device is preliminarily designed. Through the numerical simulation of the bridge telescopic device, the stress distribution of the telescopic device used in different structure forms by LRBC is analyzed, and the structure form of the telescopic device is optimized. The numerical results show that the mechanical properties of LRBC and the optimized expansion joint structure can meet the engineering requirements. (4) the construction technology of the telescopic device is studied and explained, and the improvement measures are put forward.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.31
【参考文献】
相关期刊论文 前2条
1 郭银涛;陈希为;林琳;;桥涵伸缩缝弹塑体的性能研究[J];山东理工大学学报(自然科学版);2008年04期
2 翟卫武;王榴斌;;桥梁梳齿型(SFP型)伸缩缝损坏原因分析及整修措施[J];上海铁道科技;2010年02期
本文编号：2240719
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