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Elasto-Plastic Behavior of Hybrid Member with Joint connected Steel Member with Reinforced Concrete in Series

钢筋混凝土串联钢构件混合构件的弹塑性行为

基本信息

批准号：
16560515
负责人：
NISHIMURA Yasushi
金额：
$ 1.92万
依托单位：
Osaka Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

Recently, various innovative types of composite construction have been developed in Japan. To establish a rational design method of these structures, it is necessary to clarify not only stress transferring mechanism of joint but also deformability of the member with the joint. From this point of view, this study was to clarify deformability of the member with the joint connected the steel member with the reinforced concrete member in series.In 2004, analytical model capable of estimating deformability of the member with the joint connected the steel member with the reinforced concrete member in series was proposed. The effect of local displacement of the joint was included in this model. In this model, the steel member was connected with the reinforced concrete member using elastic-plastic springs. To clarify properties of elastic-plastic spring, model tests imitating the joint were conducted. From these test results, properties of spring combined compressive properties of concrete strut and tensile properties of transverse reinforcing bar were developed.In 2005, loading tests of hybrid member with the joint connected the steel member with the reinforced concrete member in series were conducted. The effects of the thickness of the flange and friction between the steel members and concrete were investigated on hysteretic characteristics. From these test results, it was shown that a hysteretic characteristic was influenced by friction between the steel members and concrete. To verify analytical model proposed in 2004, a numerical analysis was conducted. It was shown that initial stiffness was good agreement with the test results.These results could be applied to the problems of the joints connected the steel reinforced concrete with the steel member in series and steel column bases consolidated by reinforced concrete.

最近，日本开发了各种创新类型的复合结构。为了建立合理的结构设计方法，不仅需要明确节点的应力传递机理，还需要明确节点构件的变形能力。从这个角度来看，本研究是为了明确钢构件与钢筋混凝土构件串联连接节点的构件的变形能力。2004年，提出了能够估计钢构件与钢筋混凝土构件串联连接的构件变形能力的分析模型。该模型考虑了关节局部位移的影响。在该模型中，钢构件与钢筋混凝土构件采用弹塑性弹簧连接。为了阐明弹塑性弹簧的特性，进行了模拟关节的模型试验。根据这些试验结果，推导了混凝土支撑的弹簧组合抗压性能和横向钢筋的拉伸性能。2005年，进行了钢构件与钢筋混凝土构件串联连接的混合动力构件的荷载试验。研究了翼缘厚度和钢构件与混凝土之间的摩擦力对结构滞回特性的影响。这些试验结果表明，钢构件与混凝土之间的摩擦影响了钢构件的滞回特性。为了验证2004年提出的分析模型，进行了数值分析。计算结果表明，初始刚度与试验结果吻合较好。这些结果可应用于钢筋混凝土与钢构件串联连接的节点和钢筋混凝土加固的钢柱基础问题。