斜拉桥伸缩装置模型试验与有限元分析
发布时间：2019-03-21 10:40
【摘要】：论文研究一种新型的大跨度斜拉桥伸缩传力转装置,其整体结构与机械结构中的活塞类似。这种装置不仅能有效释放主梁的纵向位移,还能承担一定的弯矩并保证行车的平顺性。针对这种新型装置开展的试验研究还比较少,导致在设计模型及开展相关试验时缺乏参考。以琼州海峡大桥作为工程依托,本文围绕这种新型装置的有限元分析和模型试验开展了以下研究：1、根据伸缩传力装置实桥结构模型有限元分析结果,设计出可实现的试验加载方案。对伸缩传力装置的实桥结构模型,运用有限元软件分别对试验荷载和实际荷载作用工况进行分析并进行结果比较,证明伸缩传力装置的试验加载方案可以模拟其实际受力情况。2、对伸缩传力装置实桥结构模型进行简化得到其试验结构模型,并对其进行有限元分析。对比两种模型在试验加载方案下的有限元分析结果,证明了试验结构模型基本能够反映实桥结构模型的受力特性。3、在实验室开展模型试验,得到伸缩传力装置的应力及位移响应,同时验证了伸缩传力装置的工作性能及支座的耐磨性。4、将试验测量结果与试验结构模型有限元分析结果进行比较,验证了计算结果的准确性。对其中出现的差异进行分析,提出了可能导致差异出现的原因,为同类型试验提供了借鉴经验。
[Abstract]:In this paper, a new type of telescopic force transfer device for long-span cable-stayed bridge is studied. Its whole structure is similar to that of piston in mechanical structure. This device not only can effectively release the longitudinal displacement of the main beam, but also can bear a certain bending moment and ensure the ride comfort. The experimental research on this new device is relatively few, which leads to lack of reference in the design of the model and the related tests. Based on the project of Qiongzhou Strait Bridge, this paper focuses on the finite element analysis and model test of this new device: 1, according to the results of finite element analysis of the real bridge model of the telescopic force transfer device, A feasible experimental loading scheme is designed. The finite element software is used to analyze the actual bridge structure model of the telescopic force transfer device and compare the results between the experimental load and the actual load. It is proved that the experimental loading scheme of the telescopic force transfer device can simulate the actual stress. 2. The experimental structure model is obtained by simplifying the real bridge structure model of the telescopic force transfer device, and the finite element analysis of the model is carried out. Comparing the finite element analysis results of the two models under the experimental loading scheme, it is proved that the experimental structural model can basically reflect the mechanical characteristics of the real bridge structural model. 3, the model test is carried out in the laboratory. The stress and displacement responses of the telescopic force transfer device are obtained, and the working performance of the telescopic force transfer device and the wear resistance of the support are verified. 4. The test results are compared with the results of the finite element analysis of the test structure model. The accuracy of the calculated results is verified. Based on the analysis of the differences, the possible causes of the differences are put forward, which can be used for reference in the same type of experiments.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27
本文编号：2444861
[Abstract]:In this paper, a new type of telescopic force transfer device for long-span cable-stayed bridge is studied. Its whole structure is similar to that of piston in mechanical structure. This device not only can effectively release the longitudinal displacement of the main beam, but also can bear a certain bending moment and ensure the ride comfort. The experimental research on this new device is relatively few, which leads to lack of reference in the design of the model and the related tests. Based on the project of Qiongzhou Strait Bridge, this paper focuses on the finite element analysis and model test of this new device: 1, according to the results of finite element analysis of the real bridge model of the telescopic force transfer device, A feasible experimental loading scheme is designed. The finite element software is used to analyze the actual bridge structure model of the telescopic force transfer device and compare the results between the experimental load and the actual load. It is proved that the experimental loading scheme of the telescopic force transfer device can simulate the actual stress. 2. The experimental structure model is obtained by simplifying the real bridge structure model of the telescopic force transfer device, and the finite element analysis of the model is carried out. Comparing the finite element analysis results of the two models under the experimental loading scheme, it is proved that the experimental structural model can basically reflect the mechanical characteristics of the real bridge structural model. 3, the model test is carried out in the laboratory. The stress and displacement responses of the telescopic force transfer device are obtained, and the working performance of the telescopic force transfer device and the wear resistance of the support are verified. 4. The test results are compared with the results of the finite element analysis of the test structure model. The accuracy of the calculated results is verified. Based on the analysis of the differences, the possible causes of the differences are put forward, which can be used for reference in the same type of experiments.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27
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