Seismic Behavior of Circular SRC Mega Column with Different Profiled Steel

CAO Wanlin1 GUO Huazhen1 LV Xilin2 ZHOU Jianlong3 WU Haipeng1,4

(1.College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, China 100124)
(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;

【DOI】

【Funds】 Youth Program of National Natural Science Foundation of China (51808014)

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(Translated by LIU T)

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This Article

ISSN:1004-4574

CN: 23-1324/X

Vol 28, No. 06, Pages 1-9

December 2019

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Article Outline

Abstract

  • 1 General situation of test
  • 2 Test results and analysis
  • 3 Calculation of bearing capacity
  • 4 Numerical simulation
  • 5 Conclusions
  • References