RC柱双向单调加载试验与分析

完成了截面尺寸、配筋、混凝土强度基本相同的 8个正方形钢筋混凝土 (RC)柱的单向和双向水平单调加载试验。结果表明 ,单调加载的RC柱的破坏现象比较轻 ;受力次方向的水平力降低了受力主方向的极限承载力 ,轴压比大 ,降低幅度也大 ;正方形对称配筋的RC柱 ,截面的极限承载力、破坏时的极限变形能力 ,与两个方向施加的位移比例无关。用负刚度模型、承载力离散化空间相关性和复合结构法进行了理论分析 ,所得水平力 -位移关系曲线与试验结果吻合较好。

TEST AND ANALYSIS ON REINFORCED CONCRETE COLUMNS UNDER BI-DIRECTIONAL MONOTONIC LOADING

Eight rectangular reinforced concrete (RC) columns with the same dimensions,reinforcements and concrete strength were tested under uni\|and bi\|dirction monotonically increased lateral loading.Test results show that damage of RC columns under monotonically increased loading is lighter,the ultimate load\|carrying capacity in the main loading direction is reduced by the lateral load in the secondly lading direction,the displacement ratio of two loading directions does not influence the ultimate load carrying\|capacity of the section and the ultimate deformation capacity of the rectangular RC columns with symmetrical reinforcements.Theoretical analysis with negative stiffness model and discrete spatial capacity interaction sphere and composite structure method was performed.The obtained lateral force\|displacement curves have good agreement with the test results.