波纹钢腹板PBL剪力键构造性能研究

发布时间：2018-06-17 11:57

本文选题：波纹钢腹板 + PBL剪力键　；参考：《中南林业科技大学》2014年硕士论文

【摘要】：做为一种新型的钢-混组合结构梁桥,波纹钢腹板结构受力合理,美观经济等诸多优点使得该类桥有着广阔的发展前景,但是目前我国对于该类桥的研究尚处于初级阶段,虽然也取得了一些成绩,但还有很多问题值得进一步探讨。尤其是对于该类桥剪力键的研究更是少之又少,目前对于波纹钢腹板顶底板与波形钢腹板的连接键计算,国内没有统一规范,基本参考河南省地方标准《公路波形钢腹板预应力混凝土箱梁桥设计规范》和国外规范。因此了解该类结构剪力键的受力特点,建立一套针对我国波纹钢腹板桥梁的设计规范和方法是非常有必要的。 PBL剪力键是一种新型剪力键,和传统的剪力键比较,该新型剪力键具有承载力大、延性好、加工制造简单、抗疲劳性能好等优点。而中国目前对于该新型剪力键的设计还没有统一的规范,基本借鉴日本规范,因此有待对比研究两国规范优缺点并探讨其构造性能以验证我国规范的合理性并对我国大跨径波纹钢腹板桥的PBL剪力键设计提供参考意见。本文以目前世界上跨径最大的波纹钢腹板桥梁——东宝新安大桥新建工程(88m+156m+88m波形钢腹板PC连续箱梁)为工程背景,结合日本规范针对PBL剪力连接件进行了一些研究,具体内容如下： 1)系统介绍了波纹钢腹板结构的特点,钢材与混凝土之间的连接方式和种类并概括了国内外研究现状。 2)结合两种日本方法按照明确的剪力连接键设计流程对东宝新安大桥PBL剪力连接件进行了验算,验算过程可与我国验算方法进行相互验证,为我国大跨波纹钢腹板结构的PBL剪力键设计提供对比和参考。 3)利用ANSYS构造并分析了PBL剪力键的有限元计算模型并进行参数分析,初步了解参数变化对该类剪力键受力影响。 4)将有限元参数分析结果和试验结果、各公式结果进行了对比,明确了PBL剪力键各参数对PBL剪力键受力性能的影响以及采用有限元软件对PBL剪力键进行分析的准确性。
[Abstract]:As a new type of steel-concrete composite beam bridge, the corrugated steel web structure has many advantages, such as reasonable force, beautiful economy and so on. However, the research of this kind of bridge is still in the primary stage in our country. Although some achievements have been made, but there are still many issues worth further discussion. Especially for this kind of bridge shear bond research is very rare. At present, there is no uniform specification for the calculation of the connection key between corrugated steel web top and bottom plate and corrugated steel web plate. The design code of prestressed concrete box girder bridge with corrugated steel web plate of highway is referred to the local standard of Henan Province and the foreign code. Therefore, it is necessary to understand the mechanical characteristics of this kind of structural shear keys and to establish a set of design specifications and methods for corrugated steel web bridges in China. The PBL shear bond is a new type of shear bond, which is compared with the traditional shear key. The new shear bond has the advantages of large bearing capacity, good ductility, simple processing and good fatigue resistance. At present, China does not have a unified code for the design of the new shear bond. It basically draws lessons from the Japanese code. Therefore, the merits and demerits of the codes of the two countries need to be compared and discussed to verify the rationality of the codes in China and to provide reference for the PBL shear bond design of the long-span corrugated steel web plate bridges in China. In this paper, the PC continuous box girder with corrugated steel webs, which is the largest corrugated steel web bridge with the largest span in the world at present, is the newly built project of Dongbao Xinan Bridge. The PC continuous box girder with corrugated steel webs (88m 156m 88m) is used as the engineering background, and some researches on PBL shear connectors are carried out in combination with the Japanese Code. The main contents are as follows: 1) the characteristics of corrugated steel web structure are introduced systematically. The connection modes and types between steel and concrete and the current research situation at home and abroad are summarized. 2) the PBL shear connections of Dongbao Xinan Bridge are checked and calculated in combination with two Japanese methods according to the clear design process of shear connection keys. The process of checking calculation can be mutually verified with the method of checking calculation in our country. This paper provides a comparison and reference for PBL shear bond design of large span corrugated steel web structure in China. 3) the finite element calculation model of PBL shear bond is constructed and analyzed by ANSYS and its parameters are analyzed. The effect of parameter change on the stress of this kind of shear bond is preliminarily understood. 4) the results of finite element analysis and test are compared with the results of each formula. The influence of the parameters of PBL shear bond on the mechanical properties of PBL shear bond and the accuracy of the analysis of PBL shear bond with finite element software are clarified.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.216;U441

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