Seismic retrofit of exterior RC beam-column joint using diagonal haunch

被引:44
作者
Zabihi, Alireza [1 ]
Tsang, Hing-Ho [1 ]
Gad, Emad F. [1 ]
Wilson, John L. [1 ]
机构
[1] Swinburne Univ Technol, Ctr Sustainable Infrastruct, Melbourne, Vic, Australia
关键词
Limited-ductile; RC frame; Exterior beam-column joint; Seismic retrofit; Single diagonal haunch; REINFORCED-CONCRETE BUILDINGS; PERFORMANCE; DESIGN; EARTHQUAKE; TESTS;
D O I
10.1016/j.engstruct.2018.07.100
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Exterior beam-column joint is typically the weakest link in a limited-ductile RC frame structure. The use of diagonal haunch element has been considered as a desirable seismic retrofit option for reducing the seismic demand at the joint. Previous research globally has focused on implementing double haunches, whilst the performance of using single haunch element as a less-invasive and more architecturally favourable retrofit option has not been investigated. In this study, the feasibility of using a single haunch system for retrofitting RC exterior beam-column joint is explored. This paper presents the derivation of the key formulations for the implementation of a single diagonal haunch as well as the generalization of the formulations for all three systems: the non-retrofitted subassembly, the double haunch retrofitting system, and the single haunch retrofitting system. The formulations have then been validated by available experimental data for non-retrofitted subassembly and double haunch retrofitting system. Finally, the effectiveness of the single haunch retrofitting system is compared with that of the double haunch retrofitting system through a parametric study.
引用
收藏
页码:753 / 767
页数:15
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