Shear Resistant Behavior of RC Columns Subjected to Axial Pulse-Like Ground Motions

Abstract:

The shear-resistant behavior of reinforced concrete (RC) columns subjected to axial velocity pulse-like ground motions was studied. Single RC columns with the constant vertical and horizontal fundamental period were used to investigate the influences of fault-distance of earthquake records, vertical to horizontal acceleration spectral ratio of earthquake records, initial axial load ratio and shear span ratio of RC column, on the shear-resistant behavior of RC columns. a suite of 18 strong ground motion records from Chi-chi earthquake divided into three fault-distance groups were taken as excitations to execute nonlinear dynamic time history analysis. The results demonstrated that axial velocity pulse-like earthquake action (fault-distance) had significant influences on the shear resistant-resistant of RC columns. Shear-resistant behavior (shear capacity/shear demand) increases with the increasing of fault-distance. Fault-distance and shear span ratio had a certain coupling influences on the shear-resistant behavior of RC columns.

• Periodical: Advanced Materials Research (Volumes 639-640)
• Pages: 832-835
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.639-640.832
• Online since: January 2013
• Authors: Wei Feng Zhao, Xiao Quan Hu, Qin Chen
• Keywords: Axial Velocity Pulse-Like Ground Motion, Fault-Distance, Reinforced Concrete Columns, Shear-Resistant Capacity, Shear-Resistant Demand

References

[1] Elwood K. J., Moehle J. P.. Dynamic shear and axial-load failure of reinforced concrete columns. Journal of Structural Engineering, Vol.134 (2008), pp.1189-1198.

DOI: 10.1061/(asce)0733-9445(2008)134:7(1189)

[2] Kunnath S., Erduran E., Chai Y. H., Yashinsky M.. Effect of near-fault vertical ground motions on seismic response of highway overcrossings. Journal of Bridge Engineering, Vol.13 (2008), pp.282-290.

DOI: 10.1061/(asce)1084-0702(2008)13:3(282)

[3] Sung J. K., Holub C. J., Elnashai A. S.. Analytical assessment of the effect of vertical earthquake motion on RC bridge piers. Journal of Structural Engineering, Vol.137 (2011), pp.252-260.

DOI: 10.1061/(asce)st.1943-541x.0000306

[4] Zhou J, Fang X D. Shear-resistant behavior of concrete frame columns subjected to velocity pulse-like excitations. Journal of Vibration and Shock, Vol.30 (2011), pp.109-115.

[5] Information on http:// http://peer.berkeley.edu/smcat/.

[6] SeismoStruct―A computer program for finite element analysis. Available from URL: http://www.seismosoft.com.