限制水泥的压力紧张曲线基于马镫在轴的负担下面限制的七十字形的柱的测试被获得。实验结果证明限制水泥的力量和变丑能被马镫为十字形的列有效地提高。与非限制的水泥相比,当马镫特征价值在 0.0460.230 的范围时,限制具体压缩力量有 8%43% ,和相应于限制水泥的山峰应力的紧张的增加有 25%195% 的增加。根据测试结果,限制水泥的压缩力量和紧张上的马镫特征和马镫间距的效果被分析。限制水泥的压缩力量与马镫特征价值和马镫的产品有一种线性关系,这被显示出有效抑制系数,和相应于限制水泥的山峰压力的紧张与马镫特征价值和马镫的产品有一种非线性的关系有效抑制系数。限制水泥的压力紧张曲线方程为十字形的柱被建议,并且计算曲线在对试验性的曲线的好同意。
The stress-strain curves of confined concrete were obtained based on tests of seven cross-shaped columns confined by stirrups under axial load. The experiment results showed that the strength and deformation of confined concrete can be enhanced effectively by stirrups for cross-shaped columns. Compared with the non-confined concrete, when the stirrup characteristic value is in the range of 0.046--0.230, the confined concrete compressive strengths has an increase of 8%--43%, and the strain corresponding to the peak stress of confined concrete has an increase of 25%-- 195%. According to the test results, the effects of stirrup characteristic and stirrup spacing on the compressive strength and strain of confined concrete were analysed. It is shown that the compressive strength of confined concrete has a linear relationship with the product of stirrup characteristic value and stirrup effective restraint coefficient, and the strain corresponding to the peak stress of confined concrete has a nonlinear relationship with the product of stirrup characteristic value and stirrup effective restraint coefficient. The stress-strain curve equation of confined concrete was proposed for cross-shaped columns, and the calculated curves are in good agreement with the experimental curves.