Techno Press

Steel and Composite Structures   Volume 16, Number 3, March 2014, pages 253-267
Experimental study on mechanical performances of lattice steel reinforced concrete inner frame with irregular section columns
Jianyang Xue, Liang Gao, Zuqiang Liu, Hongtie Zhao and Zongping Chen

Abstract     [Full Text]
    Based on the test on a 1/2.5-scaled model of a two-bay and three-story inner frame composed of reinforced concrete beams and lattice steel reinforced concrete (SRC) irregular section columns under low cyclic reversed loading, the failure process and the features of the frame were observed. The subsequence of plastic hinges of the structure, the load-displacement hysteresis loops and the skeleton curve, load bearing capacity, inter-story drift ratio, ductility, energy dissipation and stiffness degradation were analyzed. The results show that the lattice SRC inner frame is a typical strong column-weak beam structure. The hysteresis loops are spindle-shaped, and the stiffness degradation is insignificant. The elastic-plastic inter-story deformation capacity is high. Compared with the reinforced concrete frame with irregular section columns, the ductility and energy dissipation of the structure are better. The conclusions can be referred to for seismic design of this new kind of structure.
Key Words
    lattice steel; steel reinforced concrete (SRC); inner frame with irregular section columns; quasi-static test; mechanical performance
(1) Jianyang Xue, Liang Gao, Zuqiang Liu and Hongtie Zhao:
College of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an, P.R. China;
(2) Zongping Chen:
College of Civil and Architectural Engineering, Guangxi University, Nanning, P.R. China.

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