首页|Experimental study on high-strength steel earthquake resilient beam-column joints with double damage elements
Experimental study on high-strength steel earthquake resilient beam-column joints with double damage elements
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NETL
NSTL
Elsevier
Aiming to address the existing issues of earthquake resilient beam-column joints, this paper proposes a high-strength steel earthquake resilient beam-column joint with double damage elements. The relationship between the load-carrying capacity and energy dissipation ratio of the double damage elements is investigated, and the post-seismic recoverable performance of the joint is verified through damage element replacement experiment. The results indicate that the flange cover plate supports 66 %-78 % of the joint load, while the damper supports 22 %-34 %. Through the experimental analysis, it is found that the energy consumption of double damage elements accounts for more than 95 % of the total energy consumption of the joint. Combined with the finite element ALLPD, it is found that the energy consumption of the flange cover plate accounts for 85 % of the total energy consumption of the double damage elements, and the damper accounts for 15 %, which fully explains that the double damage elements can synergistically bear load-dissipate the energy. A comparison of the joint hysteresis curves before and after the replacement of the damaged element shows that the two curves overlap almost completely. Additionally, the residual deformations for the three types of joints fall within the DS2 range specified by FEMA P-58. This indicates that the joints discussed in this paper exhibit excellent post-earthquake recovery performance. The proposed cross-section stress ratio beta can accurately reflect the phenomenon of sequential yielding between double damage elements. Based on the parameter beta, a simplified calculation method of joint yielding capacity is proposed. By comparing the theoretically calculated values with the experimental and finite element results, it is found that the maximum error is not more than 10 %, which proves the effectiveness of the joint yielding load capacity calculation method.
NETL
NSTL
Elsevier
