Mechanical Behavior of Shear Connector

剪力连接器的机械性能

基本信息

批准号：
07650521
负责人：
UEDA Tamon
金额：
$ 1.41万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

Shear connector should be placed to assure the composite action between core concrete and skin steel plates in sandwich structures. The code for design of steel-concrete sandwich structures proposed by JSCE specifies how to arrange shear connectors considering its capacity for transferring shear force. However, the effects of existence and deformation characteristics of shear connector on member capacity, especially shear capacity, have not been clarified yet. In this study, having constitutive laws for finite element analysis of sandwich members in our mind, it was aimed to develop a mechanical model for prediction of deformation and capacity of shear connectors. The type of shear connector is shaped steel shear connector. The followings are the conclusions.(1) A series of test for steel plates without shear connector indicated that there was a linear relation between capacity of shear force transfer and confining force and that the capacity of shear force transfer was reduced by 20 to 30% putting lubrication oil on the plate.(2) Finite element analysis in which the part with shear connectors and the part between shear connectors were modeled differently as link elements expressing relationship between transferred shear force and slip could predict the deformation and ultimate capacity of open sandwich beams.From a series of test in which height of shear connector was a parameter the shear connector was modeled as a cantilever together with surrounding concrete. The stiffness of the cantilever was found to be dependent on the height of shear connector, the transferred shear force and the confining force in the surrounding concrete. The transferred shear force at a sudden reduction of the stiffness could be modeled as well.

应设置剪力连接件，以保证夹层结构中核心混凝土与蒙皮钢板的复合作用。 JSCE提出的钢-混凝土夹层结构设计规范规定了如何布置剪力连接件，考虑其传递剪力的能力。但剪力连接件的存在及其变形特性对构件承载力尤其是抗剪承载力的影响尚未明确。在本研究中，我们考虑了夹层构件有限元分析的本构定律，旨在开发一个用于预测剪力连接件变形和承载力的力学模型。剪力连接件的类型为型钢剪力连接件。主要结论如下：(1)对无剪力连接件的钢板进行一系列试验表明，剪力传递能力与围护力之间存在线性关系，剪力传递能力降低了20%~30%。（2）有限元分析，其中带有剪力连接件的部分和剪力连接件之间的部分被不同地建模为表达传递剪力和滑移之间关系的链接单元，可以预测开放夹层的变形和极限承载力梁.来自一系列的测试其中剪力连接器的高度是一个参数，剪力连接器与周围的混凝土一起被建模为悬臂梁。研究发现悬臂梁的刚度取决于剪力连接件的高度、传递的剪力和周围混凝土的限制力。刚度突然减小时传递的剪切力也可以进行建模。