Eccentric compressive behavior of high strength concrete filled double-tube short columns
Jiaru QIAN1(),Yang ZHANG1,Weijing ZHANG2
1. Key Laboratory of Civil Engineering Safety and Durability of the Ministry of Education, Department of Civil Engineering,Tsinghua University, Beijing 100084, China 2. College of Architecture and Civil Engineering,Beijing University of Technology, Beijing 100124, China
Static tests were conducted on 16 high strength concrete filled double-tube (CFDT) short column specimens with eccentricity ratios 0.2-0.6. The tests studied the eccentric compressive behavior of the CFDT short columns. All the specimens had identical section dimensions of 180 mm×180 mm and heights of 600 mm. The test results indicate that all the specimens failed in bending of the column and local buckling of the steel plates of the external square tube. The residual compressive force is larger than 75% of the maximum compressive force. Increasing the steel ratio of the square steel tube or the eccentricity ratio of the compressive load increases the eccentric compressive capacity of the CFDT short columns. The eccentric compressive capacity of the specimens calculated by the superposition method agrees well with the test results.
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2015, Vol. 55 
),张扬1,张微敬2
