Experimental study on seismic performance of RC frames with Energy-Dissipative Rocking Column system. (1st September 2019)

• Record Type: Journal Article
• Authors: Li, Yan-Wen; Li, Guo-Qiang; Jiang, Jian; Wang, Yan-Bo
• Is Part Of: Engineering structures. Volume 194(2019)
• Page Start: 406
• Page End: 419
• Publication Date: 2019-09-01
• Subjects: Reinforced concrete moment resisting frame -- Energy-Dissipative Rocking Column -- Soft story failure -- Pseudo-dynamic test -- Inter-story drift; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2019.05.052
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A novel system of steel Energy-Dissipative Rocking Column (EDRC) is proposed to mitigate seismic responses of reinforced concrete Moment Resisting Frames (MRFs). Pseudo-dynamic tests are conducted on two-storey two-bay reinforced concrete frames, with and without EDRC, respectively. Post-earthquake behavior of these two systems is also compared through quasi-static cyclic tests. The experimental results show that the presence of EDRC can effectively mitigate the maximum, residual and inhomogeneous of inter-storey drifts, and thus prevent the soft storey failure of MRFs. Abstract: The conventional reinforced concrete Moment Resisting Frames (MRFs) have suffered from soft story failure during major earthquake events. A novel system of steel Energy-Dissipative Rocking Column (EDRC) is proposed to mitigate seismic responses of MRFs. Pseudo-dynamic tests are conducted on large-scale two-story and two-bay reinforced concrete frames, with and without EDRC, respectively. The post-earthquake behavior of these two systems is also compared through quasi-static cyclic tests. The experimental results show that the presence of EDRC can effectively mitigate the maximum value, residual value and inhomogeneous distribution of inter-story drifts, and thus prevent the soft story failure of MRFs. It is found that the maximum and residual inter-story drift of combined MRF and EDRC systems is reduced by 26.0% and 82.0%, respectively, compared to pure MRFs. The inhomogeneous degree of inter-story drifts can be reduced by 25.0% and 11.0%, respectively, in the pseudo-dynamic and quasi-static tests.