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中文摘要：
为了研究约束混凝土轴压力学性能的尺寸效应,进行了7个高强箍筋约束普通混凝土试件的轴心受压试验。试验变量主要包括试件尺寸和箍筋形式。试验结果表明：①试件尺寸增大对约束混凝土强度有负面影响;②复合箍筋可明显提高试件延性;且其约束优势主要体现在试件承载力下降段;③随着试件尺寸增大、箍筋形式复杂,高强箍筋屈服时试件全截面应力与峰值应力的比值越大。
英文摘要：
In order to study the effect size of mechanical properties of confined concrete under axial compressive loading,axial compression experiments of seven concrete columns confined by high-strength stirrups of three groups were carried out.The main test variables were specimen size,stirrups configuration.The test result showed that： ① the enlargement of specimens decreased reinforced concrete strength;②composite stirrups could improve the ductility of columns and the constraint advantages were mainly embodied at the bearing capacity descending stage;③as the specimen size increased,the stirrup configurations became complex,the ratio of the whole section stress when the high-strength stirrups yield to the peak stress increased.
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