大跨度多塔斜拉桥伸缩传力装置适用性研究
发布时间：2019-06-05 22:53
【摘要】：文中研究了一种新型伸缩传力转装置在大跨度多塔斜拉桥中应用性能,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。文中以琼州海峡大桥斜拉桥设计方案为依据,研究伸缩传力装置对不同结构形式多塔斜拉桥结构性能的影响,并确定伸缩装置的适用性。采用大型通用有限元分析软件ANSYS分别建立不同跨度、塔数以及桥塔下塔柱高度等多种全桥模型,利用这些模型对比分析主跨跨中设置与不设置伸缩传力装置对结构的影响。首先分析了几何非线性因素对结构设置伸缩传力装置后结构内力、位移改变量的影响；然后对各结构模型在恒载、车辆活载及温度荷载下的受力变形情况进行分析,得出伸缩传力装置对结构内力和变形的影响,并得出设置伸缩传力装置后结构内力改变量与跨度、桥塔下塔高和温度变化值三个参数之间的拟合公式。采用考虑地震行波效应的多点激励时程分析法,对多塔斜拉桥跨中设置伸缩传力装置前后的结构动力特性进行比较分析,研究伸缩传力装置对于结构抗震性能的影响,进而研究伸缩传力装置对于多塔斜拉桥结构在抗震方面的适用性。
[Abstract]:In this paper, the application performance of a new telescopic force transfer device in long-span multi-tower cable-stayed bridge is studied. This device can not only effectively release the longitudinal displacement of the main beam, but also bear a certain bending moment and ensure the ride comfort. Based on the design scheme of Qiongzhou Strait Bridge cable-stayed bridge, the influence of telescopic force transmission device on the structural performance of multi-tower cable-stayed bridge with different structural forms is studied in this paper, and the applicability of the telescopic device is determined. A variety of full bridge models, such as different span, tower number and tower column height under the bridge tower, are established by using the large-scale general finite element analysis software ANSYS. These models are used to compare and analyze the influence of the telescopic force transfer device in the middle of the main span on the structure. Firstly, the influence of geometric nonlinear factors on the internal force and displacement of the structure after the telescopic force transfer device is set up is analyzed. Then the stress and deformation of each structural model under dead load, vehicle live load and temperature load are analyzed, and the influence of telescopic force transfer device on the internal force and deformation of the structure is obtained, and the change amount and span of the internal force of the structure after the telescopic force transfer device is set up. The fitting formula between the three parameters of tower height and temperature variation under the bridge tower. The dynamic characteristics of the structure before and after the telescopic force transfer device in the span of multi-tower cable-stayed bridge are compared and analyzed by using the multi-point excitation time history analysis method considering the seismic traveling wave effect, and the influence of the telescopic force transfer device on the seismic performance of the structure is studied. Furthermore, the applicability of telescopic force transfer device to multi-tower cable-stayed bridge structure is studied.
【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：2493877
[Abstract]:In this paper, the application performance of a new telescopic force transfer device in long-span multi-tower cable-stayed bridge is studied. This device can not only effectively release the longitudinal displacement of the main beam, but also bear a certain bending moment and ensure the ride comfort. Based on the design scheme of Qiongzhou Strait Bridge cable-stayed bridge, the influence of telescopic force transmission device on the structural performance of multi-tower cable-stayed bridge with different structural forms is studied in this paper, and the applicability of the telescopic device is determined. A variety of full bridge models, such as different span, tower number and tower column height under the bridge tower, are established by using the large-scale general finite element analysis software ANSYS. These models are used to compare and analyze the influence of the telescopic force transfer device in the middle of the main span on the structure. Firstly, the influence of geometric nonlinear factors on the internal force and displacement of the structure after the telescopic force transfer device is set up is analyzed. Then the stress and deformation of each structural model under dead load, vehicle live load and temperature load are analyzed, and the influence of telescopic force transfer device on the internal force and deformation of the structure is obtained, and the change amount and span of the internal force of the structure after the telescopic force transfer device is set up. The fitting formula between the three parameters of tower height and temperature variation under the bridge tower. The dynamic characteristics of the structure before and after the telescopic force transfer device in the span of multi-tower cable-stayed bridge are compared and analyzed by using the multi-point excitation time history analysis method considering the seismic traveling wave effect, and the influence of the telescopic force transfer device on the seismic performance of the structure is studied. Furthermore, the applicability of telescopic force transfer device to multi-tower cable-stayed bridge structure is studied.
【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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