Seismic Behavior of Circular SRC Mega Column with Different Profiled Steel
(2.College of Civil Engineering, Tongji University, Shanghai, China 200092)
(3.East China Architectural Design and Research Institute Co., Ltd., Shanghai, China 200011)
(4.School of Mechnics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, China 100083)
【Abstract】In order to investigate the seismic behavior of the steel reinforced concrete (SRC) mega column of the mega frame structure in a high rise building, this paper utilizes the 40 000 kN loading device to conduct low cyclic loading test on 2 circular mega column specimens, where H-shaped profiled steel and cross-shaped profiled steel are encased. The cross-sectional geometric dimension, steel ratio, reinforcement ratio, and concrete strength of the two specimens are the same. The main difference lies in the profiled steel type. The failure feature, hysteretic curve, bearing capacity, deformability, stiffness degradation, and energy dissipating ability are analyzed and compared. The influence of profiled steel type on seismic behavior is obtained. Moreover, the bearing capacity is calculated by the fiber method. Results show that for both specimens major bending failure is observed. The hysteretic curves are full and the bearing capacity declines smoothly. In addition, the ultimate drift ratio exceeds 5%. The deformability and energy dissipating ability of the two specimens exhibit very well. The seismic behavior along the two engineering axis of the mega column encased cross-shaped profiled steel is the same, but the seismic behavior along strong axis of the mega column encased H-shaped profiled steel is relatively better. The calculated bearing capacity matches the test results well.
【Keywords】 SRC; profiled steel type; circular mega column; seismic behavior; experimental research;
(Translated by LIU T)
 YANG Guang, CAO Wanlin, DONG Hongying, et al. Compressive strain test analysis of special-shaped multi-cell mega-bifurcated concrete filled steel tubular columns [J]. Journal of Natural Disasters, 2016, 25(6): 138–149 (in Chinese).
 HAN Yi, MAO Wenjing, WANG Wenda. Fire behavior of concrete-filled square steel tubular column with encased profiled steel subjected to non-uniform fires [J]. Journal of Natural Disasters, 2016, 25(5): 149–157 (in Chinese).
 CAO Wanlin, HUI Cun, DONG Hongying, et al. Experimental study on seismic behavior of I-shaped steel reinforced concrete columns with concealed double steel plates [J]. Journal of Natural Disasters, 2014, 23(2): 85–93 (in Chinese).
 WANG Tiecheng, ZHANG Yaohua, WANG Yuliang. Intelligent analysis of shear performance of shape-rolled concrete columns under low-cycle loading [J]. Journal of Natural Disasters, 2007, 16(4): 126–131 (in Chinese).
 Lacki P, Derlatka A, Kasza P. Comparison of steel-concrete composite column and steel column [J]. Composite Structures, 2018, 202: 82–88.
 LIU Zuqiang, DU Zhenyu, XUE Jianyang, et al. Experimental study and finite element analysis on seismic behavior of solid-web steel reinforced concrete cross-shaped and L-shaped columns [J]. Journal of Building Structures, 2019, 40(4): 104–115 (in Chinese).
 YING Wudang, CHEN Zongping. Interface bond force transfer mechanisms and its influence analysis between shape steel and high-strength concrete [J]. China Civil Engineering Journal, 2016, 49(9): 53–63 (in Chinese).
 HUANG Yayi. Experimental study on proper steel content of steel reinforced high-strength concrete columns with studs [D]. Chongqing: Chongqing University, 2009 (in Chinese).
 HUANG Bin, CHENG Quanping, GE Yong. Seismic performance of HSRC frame columns with welded-studs on flange [J]. Building Science, 2014, 30(11): 55–60 (in Chinese).
 Naito H, Akiyama M. Ductility evaluation of concrete-encased steel bridge piers subjected to lateral cyclic loading [J]. Journal of Bridge Engineering, 2011, 16(1): 72–81.
 CHEN Zongping, KE Xiaojun, CHEN Yuliang. Experimental study on seismic behavior of steel reinforced high-strength concrete columns confined by square spiral stirrups [J]. China Civil Engineering Journal, 2015, 48(7): 41–49 (in Chinese).
 ZHU Weiqing, JIA Jinqing. Experimental study on seismic behavior of steel reinforced high strength concrete columns [J]. Journal of Building Structures, 2015, 36(4): 57–67 (in Chinese).
 JGJ 138–2016 Code for Design of Composite Structures [S]. Beijing: China Architecture & Building Press, 2016 (in Chinese).
 GUO Zhenhai. Strength and Constitutional Relationship of Concrete-Theory and Application [M]. Beijing: China Architecture & Building Press, 2004 (in Chinese).
 Park R. Evaluation of ductility of structures and structural assemblages from laboratory testing [J]. Bulletin of the New Zealand National Society for Earthquake Engineering, 1989, 22(3): 155–166.
 GB 50010-2010 Code for Design of Concrete Structures [S]. Beijing: China Architecture & Building Press, 2010 (in Chinese).