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Study on the design technique of reinforced concrete deck at intermediate supports of continuous steel-concrete composite girders

连续钢-混凝土组合梁中间支撑钢筋混凝土桥面设计技术研究

基本信息

批准号：
11650489
负责人：
MATSUDA Hiroshi
金额：
$ 1.98万
依托单位：
Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

This study focused on the design technique of reinforced concrete deck at middle supports of continuous steel-concrete composite girders.(a) Finite element for the steel concrete composite girder with partial interaction was formulated. Computer program for stress and deformation by creep and shrinkage was developed by Maple and MATLAB, and then parametrical computation were performed. Furthemore, two dimensional FE analysis(MARC) for creep and shrinkage analysis was carried out, and cpmpared with the results by partial interaction composite girder theory.(b) The ultimate behavior and crack analysis of reinforced concrete beam with polymer impregnatged concrete(PIC) were carried out, and the effect of ductility by PIC and crack control design at service limit level were studied. Furthermore, tied arch type composite slab composed of PIC, cast-in-place concrete and tie bar was investigated, it was found that tied arch type composite slab was favorable structures compared with the normal reinforced concrete slab.(c) For the reason of demand to reduce constructional costs, it is valuable to design the continuous composite girder supported by 2 main girders. In this study, data on table about the design criteria of continuous composite girder, the problems in actual design and the results of comparative calculation were offered. Furthemore, concrete stiffness of cracking zone at intermediate supports of continuous composite girder wes ealuated in considered to Eurocode.

研究了钢-混凝土连续组合梁中支座钢筋混凝土桥面板的设计技术。(a)建立了考虑部分相互作用的钢-混凝土组合梁有限元模型。利用Maple和MATLAB开发了徐变和收缩应力和变形的计算机程序，并进行了参数化计算。此外，还进行了二维有限元分析（MARC）的徐变和收缩分析，并与部分相关组合梁理论的结果进行了比较。(b)对聚合物增强混凝土（PIC）加固钢筋混凝土梁进行了极限承载力和裂缝分析，研究了PIC对延性的影响以及使用极限水平下的裂缝控制设计。此外，还对由PIC、现浇混凝土和系杆组成的系杆拱型组合板进行了研究，发现系杆拱型组合板是一种较好的组合板结构。(c)出于降低工程造价的需要，采用两主梁支承的连续组合梁设计具有一定的实用价值。本文对连续组合梁的设计准则、实际设计中存在的问题及对比计算结果提供了表格数据。结合欧洲规范对连续组合梁中间支座开裂区混凝土刚度进行了计算。