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Development of compression-bending-shear test setup which can examine RC/SRC columns up to their complete collapse

开发压缩-弯曲-剪切测试装置，可以检查 RC/SRC 柱的完全倒塌

基本信息

批准号：
10555198
负责人：
TAKIGUCHI Katsuki
金额：
$ 6.53万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

1.Compression-bending-shear test setup was developed. It is for reinforced concrete and/or steel encased reinforced concrete columns, and it enables complete collapse test. Constant axial force is loaded to the column specimen by steel weight. Relative rotational displacement between top stub and bottom stub of the column specimen is not permitted. Mechanical and hydraulic parallel keeping systems were developed. The column specimen can be stably loaded even at the stage that the restoring force direction is negative in the test in which the deformation is controlled to increase monotonically.2.The effect of seismic strengthening method for shear failure type reinforced concrete column using ferrocement is clarified. Shear failure type column specimens and strengthened specimens with ferrocement were made and tested up to the extremely large deformation. The specimens failed in shear were repaired and strengthened with ferrocement, and then retested.3.The relationship between the mechanical behaviors of a reinforced concrete column and bond properties of longitudinal rebars is investigated experimentally. Bond properties of longitudinal rebars of specimens were changed and restoring force characteristic of the specimens were exmined. Failure modes of the specimens subjected to compression, bending and shear were also observed in detail. Deformed bars and round bars were used as longitudinal rebars of the specimens. The bars were partially covered with paraffin wax in order to change the bond properties.

1.研制了压弯剪试验装置。它适用于钢筋混凝土和/或钢包钢筋混凝土柱，它可以进行完整的倒塌试验。恒轴力由钢重施加到柱试件上。柱试件的顶桩和底桩之间不允许有相对旋转位移。开发了机械和液压并联保持系统。在控制变形单调增加的试验中，即使在恢复力方向为负的阶段，柱样也能稳定加载。阐明了剪力破坏型钢筋混凝土柱采用钢筋水泥抗震加固方法的效果。制作了剪切破坏型柱试件和铁浆加固试件，并进行了极大变形试验。2 .对剪切破坏的试件进行修复和水泥浆加固，然后重新进行试验。试验研究了钢筋混凝土柱的受力性能与纵筋粘结性能之间的关系。改变了试件纵筋的粘结性能，并对试件的恢复力特性进行了研究。并对试件在压缩、弯曲和剪切作用下的破坏模式进行了详细观察。纵筋采用变形筋和圆筋。为了改变粘结性能，在棒材上部分覆盖了石蜡。