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Fatigue Check Method in the Performance Based Design for Slab Decks of the Steel Bridge

钢桥板桥面性能化设计中的疲劳校核方法

基本信息

批准号：
11450176
负责人：
HAMADA Sumio
金额：
$ 7.1万
依托单位：
YAMAGUCHI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

Since slabs are subjected direct moving loads, fatigue performance is the most significant in the performance based design method. In the present study fatigue performance of the concrete slab is surveyed. The loading of the slab is repeated and moving. Not only a located load fatigue strength but also the moving load fatigue strength are related to the static located load strength of the slab under punching shear. The fatigue strength under a moving load is presumably related to the repeated number. In order to study the fatigue strength under a moving load, the static strength and the relationship between strength and repeated number are evaluated. Tests were conducted by the loading test machine and moving test machine. Since the static strength is scattered naturally, the statistic properties are also required.Several slabs were tested under moving repeated load as well as reinforced concrete slabs. These slabs include a prestressed concrete slab and a steel concrete composite slab. From these tests a performance based design method for slabs is proposed by the committee in the Japan Society of Civil Engineering. The committee is chaired by Hamada, who is an executor of the project. The performance based design method is also proposed by a committee in the Japan Steel Structure Institute. These performance based design methods includes performances related to the fatigue strength under moving load.

由于楼板承受直接移动荷载，在基于性能的设计方法中，疲劳性能是最重要的。本文对混凝土板的疲劳性能进行了研究。板坯的加载是重复的和移动的。板在冲剪作用下的静荷载强度不仅与定位荷载疲劳强度有关，还与移动荷载疲劳强度有关。移动荷载作用下的疲劳强度可能与重复次数有关。为了研究在移动载荷作用下的疲劳强度，计算了静强度以及强度与重复次数的关系。试验采用加载试验机和移动试验机进行。由于静强度是自然分散的，因此也需要统计特性。对若干板和钢筋混凝土板进行了反复移动荷载下的试验。这些板包括预应力混凝土板和钢混凝土组合板。根据这些试验，日本土木工程学会的委员会提出了一种基于性能的楼板设计方法。委员会主席是滨田，他是该项目的执行者之一。日本钢结构学会的一个委员会也提出了基于性能的设计方法。这些基于性能的设计方法包括与移动载荷下的疲劳强度有关的性能。