圆锥形中空钢管混凝土叠合短柱试验研究.pdfVIP

31 卷 12 期 Vol.31 No.12 工 程 力 学 20 14 年 12 月 Dec. 20 14 ENGINEERING MECHANICS 134 文章编号：1000-4750(20 14)12-0134-06 圆锥形中空钢管混凝土叠合短柱试验研究 1,2 1 1 任庆新 ，孙明海 ，贾连光 (1. 沈阳建筑大学土木工程学 ，沈阳 110168；2. 清华大学土木工程系，北京 100084) 摘 要：该文对 12 个圆锥形中空钢管混凝土叠合短柱进行了轴压试验，探讨了锥度、截面直径及是否内置钢管 对圆锥形中空钢管混凝土叠合短柱轴压力学性能的影响，建议了圆锥形中空钢管混凝土叠合短柱轴压承载力计算 式。结果表明：锥度、截面直径及是否内置钢管对圆锥形中空钢管混凝土叠合短柱轴压性能影响显著；建议的极 限承载力计算式计算结果与试验结果总体上吻合较好，可用来预测圆锥形中空钢管混凝土叠合短柱的截面抗压 强度。 关键词：圆形截面；中空钢管混凝土叠合柱；短柱；锥形柱；承载力计算式 中图分类号：TU375.3; TU398+.9 文献标志码：A doi: 10.6052/j.issn.1000-4750.2013.07.0634 TESTS ON CIRCULAR TAPERED HOLLOW STEEL TUBE REINFORCED CONCRETE STUB COLUMNS REN Qing-xin1,2 , SUN Ming-hai1 , JIA Lian-guang1 (1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110 168, China; 2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China) Abstract: A total of 12 circular tapered hollow sreel tube reinforced concrete stub columns subj ected to axial compression were tested. The main parameters were the tapered angle, the diameter of a crossing section and with or without embedding a hollow steel tube. The influences of different parameters on the compressive mechanical properties of these specimens are discussed. Based on this, a simplified formula is put forward to calculate stub column bearing capacity. The test results show that the influence of the three parameters on the compressive specimens are very obvious, and the calculated results show a good agreement with the experimental results, and the formula can reasonably evaluate the ultimate bearing capacity of circular tapered hollow steel tubes reinforced co