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Method of Evaluating Performance of RC and SRC Beam-Columns Subjected to Repeated Horizontal Force

重复水平力作用下RC和SRC梁柱性能评价方法

基本信息

批准号：
07650666
负责人：
UCHIDA Yasuhiro
金额：
$ 1.41万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650666/
关键词：
Reinforced Concrete Beam-Columns Composite Steel and Reinforced Concrete Beam-Columns Cumulative Damage Axial Force Bending Failure Shear Failure Strength Deterioration Evaluation of Performance 繰返し水平力実験収束限界

项目摘要

Reinforced concrete beam-columns and composite steel and reinforced concrete beam-columns subjected to a seismic force often fail and the cumulative damage such as the strength deterioration and the accumulation of deformation occur. Magnitude of the cumulative damage depend on the axial force applied on the beam-column and the convergence-divergence behavior exists in the progress of cumulative damage.In this study, the characteristic curve of beam-columns under a repeated horizontal force and the method of evaluating the performance of beam-columns by using the curve is proposed. Next, RC and SRC beam-columns were tested to verify the validity of the curve. The characteristic curve is named as critical axial force-axial displacement curve.Six bending failure type and shear failure type RC specimens and two bending failure type SRC specimens were tested. Experiments compose of two parts ; tests for obtaining the critical axial force-axial displacement curve and that for proving the validity of the curve. The critical axial force-axial displacement curve expresses the relation between the critical axial force and the maximum axial displacement under which the accumulation of axial displacement converges. Analyzes in correspondence to tests were also carried out and it was found that analytical results agree with test ones very well. Obtained results are as follows ;Critical axial force-axial displacement curve takes a form of hysteresis. The progress of cumulative damage converges at the inside of the curve, but diverges at the outside. The cumulative damage of beam-column increases with the increase of the magnitude of axial force and the descending slope of the critical axial force-axial displacement curve.

钢筋混凝土梁柱和钢与钢筋混凝土组合梁柱在地震作用下经常发生破坏，并出现强度劣化和变形积累等累积损伤。累积损伤的大小取决于施加在梁柱上的轴力，累积损伤的过程中存在收敛-发散行为。本文提出了反复水平力作用下的梁柱特性曲线，并用该曲线评价梁柱性能的方法。接下来，对RC和SRC梁柱进行了测试，以验证曲线的有效性。该特性曲线称为临界轴向力-轴向位移曲线。试验了6个弯曲破坏型和剪切破坏型RC试件以及2个弯曲破坏型RC试件。实验由两部分组成；获得临界轴向力-轴向位移曲线的试验和验证曲线有效性的试验。临界轴向力-轴向位移曲线表达了临界轴向力与最大轴向位移之间的关系，在最大轴向位移下，轴向位移的累积趋于收敛。并进行了与试验的对应分析，分析结果与试验结果吻合较好。所得结果如下：临界轴向力-轴向位移曲线呈迟滞形式。累积损伤的进展在曲线内侧收敛，在曲线外侧发散。梁柱累积损伤随轴力大小和临界轴力-轴位移曲线斜率的减小而增大。