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Study on strength of shear connector in steel concrete hybrid structures under alternating load condition

交变荷载作用下钢混凝土混合结构剪力连接件强度研究

基本信息

批准号：
12650470
负责人：
NAKAJIMA Akinori
金额：
$ 2.18万
依托单位：
Utsunomiya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650470/
关键词：
stud shear connector alternating load pulsating load shear force-slip relation static strength fatigue strength experiment numerical analysis 鋼・コンクリート複合構造ずれ止め両振り試験片振り試験

项目摘要

In steel-concrete hybrid structures, it is required to connect firmly a steel member and a concrete member with some types of shear connectors. Shear connectors of headed studs are often employed in steel-concrete hybrid structures. In order to evaluate strength characteristics of stud shear connectors, a conventional push-out test method specified in the Japanese Standard is employed. However, in this push-out test, the alternating load can not be applied to the stud. From this point of view, we devised new specimen to which the alternating load can be applied easily and carried out a series of static and fatigue tests under pulsating and alternating load conditions.The main conclusions of this research may be summarized as follows :1. We devised a new specimen to which the alternating shear force as well as the pulsating one can be applied easily by using a general fatigue testing machine, in order to investigate the static strength and the fatigue strength of studs.2. The static strength of studs under the alternating load condition is smaller than the one under the pulsating load condition.3. It can be seen that there is not any difference between fatigue strength characteristics under both load conditions.4. The experimental shear force-slip behavior of the stud under the pulsating and alternating load conditions was simulated by the numerical analysis employed here.

在钢-混凝土混合结构中，要求用某些类型的剪力连接件将钢构件和混凝土构件牢固地连接起来。在钢-混凝土混合结构中，常采用栓钉剪力连接件。为了评估栓钉剪力连接件的强度特性，采用日本标准中规定的常规推出试验方法。然而，在本试验中，由于螺柱不能承受交变载荷，因此，我们设计了一种易于承受交变载荷的试件，并进行了一系列脉动和交变载荷条件下的静力和疲劳试验，主要结论如下：1.为了研究螺栓的静强度和疲劳强度，我们设计了一种新的试件，该试件可以在普通疲劳试验机上容易地施加交变剪切力和脉动剪切力.在交变荷载作用下，螺柱的静强度小于脉动荷载作用下的静强度.可以看出，两种载荷条件下的疲劳强度特性没有任何差异.通过数值分析，模拟了栓钉在脉动和交变荷载作用下的试验剪力-滑移行为。