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DEVELOPMENT OF SEISMIC PERFORMANCE FOR REINFORCED CONCRETE MEMBERS WITH EARTHQUAKE-RESISTANT STEEL BAR

抗震钢筋混凝土构件抗震性能的研究

基本信息

批准号：
17360279
负责人：
MINAMI Koichi
金额：
$ 10.23万
依托单位：
Fukuyama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360279/
关键词：
Earthquake Resistant Steel Seismic Structure Reinforced Concrete Structure Steel Structure Energy Absorption Capacity Seismic Retrofit Low Yield High Ductility 鉄筋コンクリート造抵降伏

项目摘要

A group of faculty member of the department of Civil Engineering, Architecture and Mechanical Engineering is now studying on a common theme “Research Project on Improvements in Seismic Performance of Structures" from various aspect of research. In this project, the influence which a few coefficients determine a mechanical performance of main bars do to earthquake energy consumption in formation of the plastic hinge of RC members was considered. Then Earthquake-Resistant Steel have been developed in this group.(1) The development of more ductile materials for the seismic performance involves next steps : Set 0.2% proof stress to about 100-150MPa, tensile stress to 400MPa, and elongation to 30% or greater as target values for the material. Tensile tests were carried out on several tens of several alloys produced for this investigation. Fe-4Ni-14Cr-24Mn alloy was selected as a suitable candidate. A semi-production heat of this steel was made. Hot-rolled and annealed steel plate exhibited 0.2% proof stress of 118MPa, tensile strength of 448MPa and elongation of 28%.(2)Experimental results of steel columns fabricated using Earthquake-resistant steel plates are presented. The experiments have been conducted to investigate the effects of mold line of taper plates, tapering ratio, stiffeners rigidity, and tapered stiffeners. Further studies are needed for improved strength and ductility of shear-type seismic devices.(3) It is confirmed that the energy dissipation of RC members with Earthquake-resistant steel bars increased greatly as seismic devices. The seismic performance on a existing building, adopted the seismic retrofit using the present RC member, are preformed to show the applicability of it's reinforcement.

土木工程、建筑及机械工程学系的一群教员现正就一个共同的主题“改善结构抗震性能的研究计划”进行多方面的研究。本工程考虑了决定主筋力学性能的几个系数对钢筋混凝土构件塑性铰形成时地震耗能的影响。然后，在这个小组中开发了抗震钢。(1)为抗震性能开发更具延展性的材料涉及以下步骤：将0.2%的屈服应力设定为约100- 150 MPa，拉伸应力设定为400 MPa，伸长率设定为30%或更大作为材料的目标值。拉伸试验进行了几十个几种合金生产的这项调查。选择Fe-4 Ni-14 Cr-24 Mn合金作为合适的候选材料。生产了这种钢的半成品炉。热轧退火钢板的0.2%屈服强度为118 MPa，抗拉强度为448 MPa，伸长率为28%。（2）介绍了采用抗震钢板制作的钢柱的试验结果。通过试验研究了锥形板的型线、锥度比、加劲肋刚度和锥形加劲肋的影响。剪切型抗震装置的强度和延性有待进一步研究。(3)研究结果表明，在钢筋混凝土构件中设置抗震钢筋作为抗震装置，可以大大提高构件的耗能能力。通过对某既有建筑进行抗震加固后的抗震性能试验，验证了该加固方法的适用性。