Earthquake resistance of reinforced concrete corner beam-column joints with different column axial loads under bi-directional lateral loading
The seismic performance of a corner beam-column joint in reinforced concrete frames was studied by testing two three-dimensional corner beam-column subassemblage specimens without slabs under constant column axial load and bi-directional lateral cyclic load reversals. The column-to-beam flexural strength ratio was varied from 1.4 to 2.3 by changing the magnitude of column axial load. Although a sufficient margin to prevent shear failure was provided to a corner beam-column joint in the test, the subassemblage specimens failed in joint hinging after beam and column longitudinal bars and joint hoops yielded. The ultimate joint hinging capacity of a corner joint under bi-directional lateral loading was enhanced by an increase in column compressive axial load, and can be estimated based on the new mechanism proposed by Kusuhara and Shiohara.
Shiohara H (2001). “New model for shear failure of RC interior beam-column connections”. Journal of Structural Engineering, 127(2): 152-160. DOI: https://doi.org/10.1061/(ASCE)0733-9445(2001)127:2(152)
Kusuhara F and Shiohara H (2013). “Ultimate moment of reinforced concrete exterior beam-column joint”. Journal of Structural and Construction Engineering, 78(693): 1949-1958. DOI: https://doi.org/10.3130/aijs.78.1949
Ishiki K et al. (2011). “Test for Failure Mechanism of R/C Interior Beam-Column Joint”. Summaries of Technical Papers of Annual Meeting of the Architectural Institute of Japan (AIJ), Japan, Structures IV: 497-498 (in Japanese).
Suzuki Y et al. (2014). “Effect of Lateral Reinforcement and Axial Force on Structural Performance of Exterior Beam-Column Joints in Reinforced Concrete Buildings Part 1, 2 and 3”. Summaries of Technical Papers of Annual Meeting of the Architectural Institute of Japan (AIJ), Japan, Structures IV: 361-366 (in Japanese).
Nishimura K, Muraoka S, Yagiura T and Onishi N (2014). “An experimental study on stress transfer in a reinforced concrete corner beam-column joint yielded in flexure at beam ends”. Journal of Structural and Construction Engineering, 79(699): 621-630. DOI: https://doi.org/10.3130/aijs.79.621
Architectural Institute of Japan (1999). “Design Guidelines for Earthquake Resistant Reinforced Concrete Buildings Based on Inelastic Displacement Concept”. Architectural Institute of Japan (AIJ), Japan.
Copyright (c) 2017 Kazuhiro Kitayama, Hiromu Katae
This work is licensed under a Creative Commons Attribution 4.0 International License.