钢桁—砼组合连续刚构桥墩梁联结构造研究
发布时间：2018-11-22 07:47
【摘要】：本文根据周志祥教授承担的交通运输部建设科技项目“特大跨钢桁-砼组合连续刚构桥建设基础理论研究”，依托广州青歧涌大桥的设计工作，开展了钢桁-砼组合连续刚构桥墩梁联结部位受力特征及构造设计方法研究，主要工作及成果如下： ①针对依托工程建立了空间杆系有限元模型，对钢桁-砼组合连续刚构桥结构构造特点及受力性能展开分析，得到了成桥阶段不同正常使用荷载组合工况下墩梁联结部位的受力特点以及使得墩梁联结构造承受最大水平推力的荷载组合工况； ②根据墩梁联结受力特点，提出了槽钢锚固方案、嵌入式牛腿锚固方案和预埋件锚固方案三种墩梁联结构造设计方案，分别从构造特点、受力性能、施工技术等方面进行了对比分析，推荐采用预埋件锚固方案作为青歧涌大桥墩梁联结构造方案； ③针对推荐的墩梁联结构造方案，建立实体有限元模型，对墩梁联结构造各传力构件细部力学特征进行了精细化分析，得到了墩梁连接构造各部分的力学行为特征； ④根据预埋件锚固方案的受力特征，分析了联结构造破坏形态，针对性地探讨了联结构造中的竖向受力构件和水平向受力构件设计验算方法，，并对部分细部构造尺寸进行了力学优化设计。 本文的研究成果将为钢桁-砼组合连续刚构桥墩梁联结部位的构造设计提供一定参考，为钢桁-砼组合连续刚构桥进一步推广和运用创造有利条件。
[Abstract]:According to Professor Zhou Zhixiang's scientific and technological project of construction of Ministry of Communications and Transport, "basic theory research on the construction of steel truss-concrete composite continuous rigid frame bridge", this paper relies on the design work of Guangzhou Qingqiong Bridge. The stress characteristics and structural design method of piers and beams of steel truss concrete composite continuous rigid frame bridge are studied. The main work and results are as follows: 1 the finite element model of spatial bar system is established for supporting engineering. The structural characteristics and mechanical properties of steel truss concrete composite continuous rigid frame bridge are analyzed. The stress characteristics of pier and beam connection under different normal load combination conditions and the load combination conditions which make the pier and beam joint structure bear the maximum horizontal thrust in the bridge stage are obtained. 2 according to the stress characteristics of pier and beam connection, three kinds of structural design schemes of pier beam connection are put forward, which are channel steel anchoring scheme, embedded corbel anchoring scheme and embedded member anchoring scheme. The construction technology is compared and analyzed, and it is recommended that the anchoring scheme of embedded piece should be used as the connection scheme of Qingqiong bridge pier and beam. (3) in view of the recommended structure scheme of pier and beam connection, the solid finite element model is established, and the mechanical characteristics of each load transfer component of pier beam connection structure are analyzed in detail, and the mechanical behavior characteristics of each part of pier beam connection structure are obtained. (4) according to the stress characteristics of anchoring scheme of embedded parts, the failure form of connection structure is analyzed, and the design and calculation methods of vertical and horizontal bearing members in connection structure are discussed. The mechanical optimization design of some detail structural dimensions is also carried out. The research results in this paper will provide a certain reference for the structural design of pier-beam connection of steel truss concrete composite continuous rigid frame bridge and create favorable conditions for further popularization and application of steel truss concrete composite continuous rigid frame bridge.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443
本文编号：2348558
[Abstract]:According to Professor Zhou Zhixiang's scientific and technological project of construction of Ministry of Communications and Transport, "basic theory research on the construction of steel truss-concrete composite continuous rigid frame bridge", this paper relies on the design work of Guangzhou Qingqiong Bridge. The stress characteristics and structural design method of piers and beams of steel truss concrete composite continuous rigid frame bridge are studied. The main work and results are as follows: 1 the finite element model of spatial bar system is established for supporting engineering. The structural characteristics and mechanical properties of steel truss concrete composite continuous rigid frame bridge are analyzed. The stress characteristics of pier and beam connection under different normal load combination conditions and the load combination conditions which make the pier and beam joint structure bear the maximum horizontal thrust in the bridge stage are obtained. 2 according to the stress characteristics of pier and beam connection, three kinds of structural design schemes of pier beam connection are put forward, which are channel steel anchoring scheme, embedded corbel anchoring scheme and embedded member anchoring scheme. The construction technology is compared and analyzed, and it is recommended that the anchoring scheme of embedded piece should be used as the connection scheme of Qingqiong bridge pier and beam. (3) in view of the recommended structure scheme of pier and beam connection, the solid finite element model is established, and the mechanical characteristics of each load transfer component of pier beam connection structure are analyzed in detail, and the mechanical behavior characteristics of each part of pier beam connection structure are obtained. (4) according to the stress characteristics of anchoring scheme of embedded parts, the failure form of connection structure is analyzed, and the design and calculation methods of vertical and horizontal bearing members in connection structure are discussed. The mechanical optimization design of some detail structural dimensions is also carried out. The research results in this paper will provide a certain reference for the structural design of pier-beam connection of steel truss concrete composite continuous rigid frame bridge and create favorable conditions for further popularization and application of steel truss concrete composite continuous rigid frame bridge.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443
【参考文献】
中国期刊全文数据库 前1条
1 张永水;曹淑上;;连续刚构桥薄壁墩抗推刚度计算方法研究[J];中外公路;2006年03期
本文编号：2348558
本文链接：https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/2348558.html
