曲线斜拉桥模型设计及试验研究
发布时间：2018-10-14 20:32
【摘要】：模型试验是研究复杂桥梁结构的一种常用手段,但利用全桥模型试验来研究复杂桥梁结构施工阶段的文献非常稀少。以位于刚果的一座小半径混凝土曲线斜拉桥为工程背景,进行了全桥模型的静力设计及试验研究。主要研究内容包括以下几个方面:(1)总结了曲线斜拉桥的发展状况及特点,介绍了桥梁模型试验的研究现状及相似原理,包括全几何相似设计中的相似关系及多相材质的相似关系。(2)针对模型试验的目的及现有的实际条件,提出了曲线斜拉桥模型试验的模型设计总体思路。结合实验室实际条件,确定了 1:20的缩尺模型比例,并推导了模型桥试验的静力相似关系。(3)基于刚度相似原理对模型桥进行了设计,为验证该设计方法及静力相似关系的正确性,建立了模型桥理想模型。通过该理想模型的有限元数值计算结果与调整后的原型桥监控模型结果的对比分析,结果表明基于"刚度相似原理"设计的模型桥,其设计合理,主梁内力与原桥满足相似关系,模型桥静力相似关系推导正确。(4)结合试验场地及实验室实际条件,对模型试验中试验桥进行了构件设计、配重设计及边界条件设计。针对试验桥的特点,采用双梁+板模拟复杂受力П型主梁的方式对试验桥进行了有限元分析。(5)根据试验目的确定了试验工况、测点布置及试验流程。根据试验场地条件,介绍了试验中采用的调索装置及调索方法,即测试斜拉桥各拉索索力调整变化曲线,利用该曲线及Matlab程序实现对斜拉桥模型的调索。(6)通过模型桥实际测试结果与理论模型分析结果比较分析,表明试验各工况中结构的实际受力状态与理论模型的受力状态基本一致,从而验证了本文采用的数值计算方法在用于空间复杂受力的Ⅱ型截面曲线斜拉桥的受力分析是可靠的。
[Abstract]:Model test is a common method to study complex bridge structure, but the literature on the construction stage of complex bridge structure by full-bridge model test is very rare. Taking a small radius concrete curved cable-stayed bridge in Congo as the engineering background, the static design and experimental study of the whole bridge model are carried out. The main research contents are as follows: (1) the development and characteristics of curved cable-stayed bridge are summarized, and the research status and similarity principle of bridge model test are introduced. It includes the similarity relation in the whole geometric similarity design and the similarity relation of the multiphase material. (2) according to the purpose of the model test and the existing practical conditions, the general idea of the model design of the curved cable-stayed bridge model test is put forward. Combined with the actual conditions of the laboratory, the scale of the scale model of 1:20 is determined, and the static similarity relation of the model bridge test is deduced. (3) based on the principle of stiffness similarity, the model bridge is designed. In order to verify the correctness of the design method and the static similarity relationship, the ideal model of the model bridge is established. The finite element numerical results of the ideal model are compared with the results of the adjusted prototype bridge monitoring model. The results show that the design of the model bridge based on the "stiffness similarity principle" is reasonable. The internal force of the main beam is similar to the original bridge, and the static similarity relation of the model bridge is derived correctly. (4) combined with the actual conditions of the test site and laboratory, the design of component, counterweight and boundary conditions are carried out for the test bridge in the model test. According to the characteristics of the test bridge, the finite element analysis of the test bridge is carried out by means of the double beam plate simulating the complex force of the main beam. (5) according to the test purpose, the test conditions, the layout of the measuring points and the test flow are determined. According to the conditions of the test site, this paper introduces the cable adjusting device and the cable adjusting method used in the test, that is, testing the changing curve of the cable force of each cable in the cable-stayed bridge. Using the curve and Matlab program, the cable adjustment of the cable-stayed bridge model is realized. (6) the actual test results of the model bridge are compared with the theoretical model analysis results. The experimental results show that the actual stress state of the structure is basically consistent with that of the theoretical model, which verifies that the numerical calculation method used in this paper is reliable in the analysis of the stress of the curved cable-stayed bridge of type 鈪，
本文编号：2271568
[Abstract]:Model test is a common method to study complex bridge structure, but the literature on the construction stage of complex bridge structure by full-bridge model test is very rare. Taking a small radius concrete curved cable-stayed bridge in Congo as the engineering background, the static design and experimental study of the whole bridge model are carried out. The main research contents are as follows: (1) the development and characteristics of curved cable-stayed bridge are summarized, and the research status and similarity principle of bridge model test are introduced. It includes the similarity relation in the whole geometric similarity design and the similarity relation of the multiphase material. (2) according to the purpose of the model test and the existing practical conditions, the general idea of the model design of the curved cable-stayed bridge model test is put forward. Combined with the actual conditions of the laboratory, the scale of the scale model of 1:20 is determined, and the static similarity relation of the model bridge test is deduced. (3) based on the principle of stiffness similarity, the model bridge is designed. In order to verify the correctness of the design method and the static similarity relationship, the ideal model of the model bridge is established. The finite element numerical results of the ideal model are compared with the results of the adjusted prototype bridge monitoring model. The results show that the design of the model bridge based on the "stiffness similarity principle" is reasonable. The internal force of the main beam is similar to the original bridge, and the static similarity relation of the model bridge is derived correctly. (4) combined with the actual conditions of the test site and laboratory, the design of component, counterweight and boundary conditions are carried out for the test bridge in the model test. According to the characteristics of the test bridge, the finite element analysis of the test bridge is carried out by means of the double beam plate simulating the complex force of the main beam. (5) according to the test purpose, the test conditions, the layout of the measuring points and the test flow are determined. According to the conditions of the test site, this paper introduces the cable adjusting device and the cable adjusting method used in the test, that is, testing the changing curve of the cable force of each cable in the cable-stayed bridge. Using the curve and Matlab program, the cable adjustment of the cable-stayed bridge model is realized. (6) the actual test results of the model bridge are compared with the theoretical model analysis results. The experimental results show that the actual stress state of the structure is basically consistent with that of the theoretical model, which verifies that the numerical calculation method used in this paper is reliable in the analysis of the stress of the curved cable-stayed bridge of type 鈪，
本文编号：2271568
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