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Evaluation method and improvement of energy absorption of RC and PC structure member by using DFST

DFST评价RC、PC结构构件能量吸收的方法及改进

基本信息

批准号：
09650520
负责人：
MAEGAWA Koji
金额：
$ 2.18万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650520/
关键词：
Concrete-filled Steel Tube Energy Absorption Concrete Dowel Composite Beam Bond Strength

项目摘要

The RC and PC structures subjected to the impact-load such as earthquake and rock-fall are destroyed in brittleness. It is proposed that such a load having a low occurrence probability and huge energy should be absorbed by the plasticity deformation of structure. The development of structure members with excellent energy absorption and the establishment of its evaluation method are indispensable for that. This study has developed a new composite structure member by using concrete-filled steel pipe (CEST) instead of the compression steel-bars of RC and PC members and applied it to the structure which needs the high energy absorption. This report is arranged about the following items.1. Push-out tests concerning bond strength of concrete-filled steel pipe (CFST) and the concrete block(1)The concrete dowels, which are formed by using the bored steel-tube, are effective for the bond strength between the steel-tube and concrete block.(2)The adhesion of steel-tube and concrete has been increased by the sand blasting processing of the steel-tube surface and/or by spreading adhesive agent on it.2. Static bending test and impact load test on the composite beam reinforced with CFST were done. It was confirmed that toughness (deformability) was improved by using CFST for compression reinforcements.3. Static bending load and axial force were applied on steel-tube and concrete composite column. The hole of the bored steel-tube becomes a defect, when the column is subjected to cyclic load.4. Static load tests were done on a half-size model to simulate the real structure, i.e. rockshed.

钢筋混凝土和预应力混凝土结构在地震、落石等冲击荷载作用下脆性破坏。提出这种发生概率低、能量大的荷载应由结构的塑性变形吸收。开发吸能性能优良的结构构件，建立吸能性能评价方法，是实现吸能性能优良的必要条件。本研究采用钢管混凝土（CEST）代替钢筋混凝土和预应力混凝土的压缩钢筋，开发了一种新型的组合结构构件，并将其应用于需要高吸能的结构中。这份报告是关于以下几个项目安排的。钢管混凝土与混凝土砌块粘结强度的推出试验(1)采用钻孔钢管形成的混凝土销钉对钢管与混凝土砌块的粘结强度是有效的。(2)通过对钢管表面进行喷砂处理和/或在钢管表面涂布胶粘剂，提高钢管与混凝土的附着力。对钢管混凝土加固组合梁进行了静力弯曲试验和冲击载荷试验。结果表明，采用钢管混凝土进行压缩加固，可以提高混凝土的韧性（变形能力）。对钢管-混凝土组合柱施加静弯荷载和静轴力。3 .柱在循环荷载作用下，钻孔钢管孔形成缺陷。在半尺寸模型上进行静载试验，模拟实际结构，即岩棚。