Affiliation:
1. Tongji University
2. Shanghai Institute of Architectural Design and Research
Abstract
In order to research seismic behavior of flat columns under bilateral cyclic loading with different angles, pseudo-static tests are conducted, which includes three 1:2 scaled flat columns. The height-width ratio of the column section is 5. And the loading directions are 00, 250 and 450 respectively. By observation of the test phenomenon and analysis of the data, the seismic performance of the columns including stiffness, skeleton curves, hysteresis curves, ductility and energy dissipation are obtained. Moreover, finite element program ANSYS is employed to simulate the bearing capacity of specimens. The research shows that with the loading angles increasing from 0 to 45, the strength of the flat column decreased gradually, while the ductility and energy dissipation capacity increase, and the failure mode changed from compression-shear to compression-bending. P-Δ effect becomes evident at lager values of loading angle. The compression-shearing curve of flat column complies with a heart-shape curve.
Publisher
Trans Tech Publications, Ltd.
Reference12 articles.
1. Razvi, S., and Saatcioglu, M. (1999). Confinement model for highstrength concrete. J. Struct. Eng., 125(3), 281–289.
2. Huang Xuanming, Cao Wanlin, Lu Xilin. Experimental study on seismic behavior of short pier RC shear walls with different forms of concealed bracings [J]. Earthquake Engineering and Engineering Vibration, 2005, 25(3): 60-66.
3. Watanabe Fumio, Muguruma Hiroshi. STRENGTH EVALUATION OF R/C COLUMN FAILING IN SHEAR[J]. Transactions of the Japan Concrete Institute, 38(7): 285-292, (1985).
4. Kyle A Woodward, James O Jirsa. Influence of reinforcement on RC short columns lateral resistance[J]. Journal of Structural Engineering-ASCE, ll0(1): 90-104, (1984).
5. Kyuichi Maruyama, Ramirez Horatio, and Jirsa. James O. SHORT RC COLUMNS UNDER BILATERAL LOAD HISTORIES[J]. Journal of Structural Engineering, 1 10(1): 120-137, (1984).