集簇式栓钉连接钢混组合梁桥横向分布系数研究

论文总字数：23580字

摘 要

经济性好。通过剪力连接件的连接作用，钢梁和桥面板形成组合截面，共同承担荷载。栓钉连接件是目前使用最广泛的连接件，但是与常规的分布式群钉连接方式相比，集簇式栓钉连接组合梁呈现出新的力学特征。

关键词：钢-混组合梁桥 荷载横向分布 有限元 梁格法

Abstract

In recent years, with the rapid development of highway network and gradually improve he urban bridge, bridge construction technology, and theoretical studies obtained widely improve. Steel-concrete composite girder bridges have been widely used in various countries of the world because of their excellent mechanical properties and economical efficiency. The peg connector is currently the most widely used connector, but compared to the conventional distributed group nail connection, the cluster peg connection composite beam exhibits new mechanical characteristics.

This paper focuses on the mechanical characteristics of steel-concrete composite girder bridges. The Midas/Civil2017 finite element analysis software is used to perform finite element analysis on the load lateral distribution coefficient of steel-concrete composite girder bridges. By changing the structural design parameters, it analyzes the load transverse direction. The effect of distribution. This article has achieved the following results:

1. By reviewing the related literature, the development, characteristics and research status of steel-concrete composite girder bridges are reviewed. Combined with the theory of lateral load distribution of bridges, the calculation method and applicability of transverse load distribution factors of steel-concrete composite girder bridges are summarized.
2. Taking the four-beam steel-concrete composite girder bridge as an example, the finite element numerical model was established using Midas/Civil, and the lateral distribution coefficient of each girder was obtained under the most unfavorable load, which was compared with the eccentric pressure method and the beam grid method. This paper compares the results of load lateral distribution calculated by the grid method, and then discusses a reasonable method for calculating the lateral load distribution factor of steel-concrete composite girder bridges and verifies the correctness of the numerical model.
3. Based on the finite element numerical model, parametric analysis of the relevant factors affecting the lateral distribution of loads was performed. From the angle of shear pin spacing, the number of beams, the number of main beams, etc., their influence on the lateral distribution coefficient of load was discussed, and the related changes were summed up.

KEY WORDS: Steel-concrete composite beam bridge, load lateral distribution, finite element, beam grid method

目 录

第1章 绪论 1

1.1. 引言 1

1.2. 钢-混组合桥梁的发展及研究 1

1.2.1. 钢-混组合桥梁的特点及分类 1

1.2.2. 钢-混组合桥梁的发展概况 5

1.3. 剪力连接件 6

1.3.1. 剪力连接件的分类及特点 6

1.3.2. 集簇式栓钉连接件 7

1.4. 本文研究内容和方法 9

1.4.1. 研究对象 9

1.4.2. 研究内容和方法 9

第2章 荷载横向分布理论 10

2.1. 横向分布系数概述 10

2.1.1. 杠杆原理法 12

2.1.2. 刚性横梁法 12

2.1.3. 铰接板(梁)法与刚接板(梁)法 14

2.1.4. 比拟正交异性板法 15

2.2. 荷载横向分布理论的研究现状 15

2.3. 钢-混组合梁桥横向分布系数研究现状 17

2.4. 本章小结 18

第3章 钢-混组合梁桥数值模拟及方法选择 19

3.1. 工程概况 19

3.2. 钢-混组合梁桥数值模拟 19

3.3. 荷载横向分布系数的理论计算 29

3.3.1. 偏心压力法 29

3.3.2. 梁格法 30

3.3.3. 改进梁格法 32

3.3.4. 对比分析 34

3.3.5. 本章小结 34

第4章 钢-混组合梁桥的横向分布的影响分析 36

4.1. 剪力钉间距的影响 36

4.2. 横隔梁间距对横向分布系数的影响 37

4.3. 主梁数量对横向分布系数的影响 39

4.4. 本章小结 43

第5章 结论与展望 44

5.1. 主要结论 44

5.2. 需要进一步解决的问题 44

参考文献 46

附录1 48

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