Study on Seismic Design of Bridges Systems

桥梁系统抗震设计研究

基本信息

批准号：
11695057
负责人：
HASEGAWA Akira
金额：
$ 2.5万
依托单位：
Hachinohe 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：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11695057/
关键词：
CFT RCFT Seismic Design Bridges Composite Structure Photo Elastic 鉄筋コンクリート鋼管

项目摘要

In the Hyogo Nanbu earthquake 1995, A lot of Bridges were damaged greatly. To prevent the damage of bridges, a new structure which has excellent performances on the strength and the displacements should be developed.It is well known that Concrete Filled steel Tube (CFT) has excellent mechanical performances. If the uniting of the steel tube and concrete will be promoted, the performance increases leaping. In this study, Reinforced Concrete Filled operation Between the steel Tube (RCFT) that Reinforced Concrete (RC) is filled in the steel tube, was treated. By experiments, the composite operation between the steel tube and RC, and mechanical performances by the rib were researched. Besides, it IB researched how the ratio of radius of cylinder to wall thickness, strength of filled concrete influence to the performance of RCFT.In this study, compression tests and bending tests, related to CFT and RCFT, were carried out to investigate their mechanical properties. The findings obtained from the series of tests are as follows.in Compression test(1) Strength and ductility of CFT-RCFT specimens were more excellent than RC specimens.(2) High strength concrete is excellent in the maximum strength. But, it is inferior to the ductility.(3) The rib improves the strength and confined effect. And the ductility is excellent, too.(4) The local buckling stiffened effect was excellent in the case of thin steel tubes.in bending test(1) In the strength and ductility factor, high strength CFT-RCFT were equal approxmately to low strength CFT・RCFT.(2) The local buckling stiffened effect was excellent in the case of thin steel tubes.(3)The rib improves the strength and confined effect of RCFT. And the ductility is excellent, too.

1995年兵库县南部地震中，许多桥梁遭到严重损坏，为了防止桥梁损坏，需要开发一种在强度和位移方面都具有优异性能的新型结构。众所周知，钢管混凝土（CFT）。）具有优异的机械性能，如果促进钢管和混凝土的结合，则性能会飞跃性地提高，在本研究中，钢管之间的钢筋混凝土填充操作（RCFT）。在钢管内填充钢筋混凝土，通过试验研究了钢管与钢筋混凝土的复合作用以及肋的力学性能，并研究了圆柱体半径与钢筋混凝土的比值。壁厚、填充混凝土的强度对RCFT的性能有影响。在本研究中，进行了与CFT和RCFT相关的压缩试验和弯曲试验，以研究它们的力学性能，从一系列试验中获得的结果如下。。在压缩试验(1)CFT-RCFT试件的强度和延展性优于RC试件。(2)高强混凝土的最大强度优异，但延展性较差。(3)肋提高了强度。 (4)在薄壁钢管的情况下，局部屈曲加固效果优异。弯曲试验中(1)在强度和延展性方面，强度高。 CFT-RCFT与低强度CFT·RCFT大致相同。(2)对于薄钢管，局部屈曲加固效果优异。(3)肋提高了RCFT的强度和约束效果，延展性优异。，也。