Seismic behavior and design method of seawater sea-sand concrete reinforced with GFRP and five interlocking spirals

Xiong, Zhe; Zheng, Jinhu; Huang, Yubiao; Wang, Zhimin; Chen, Junyu; Lin, Lianghao; Li, Lijuan; Qiao, Sihua; Liu, Feng

doi:10.1016/j.engstruct.2023.116410

Cited by 2 publications

(2 citation statements)

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“…The five-spiral stirrup has the potential to enhance the seismic performance of the precast beam-column joint owing to its features of desirable continuity, high confining effect, and convenience in fabrication [19,20]. The five-spiral stirrup consists of four small stirrups, in column corners, to offer high confinement on the concrete in corners and a large stirrup to laterally reinforce the whole section and fix the longitudinal rebars [21].…”

Section: Introductionmentioning

confidence: 99%

“…Fang et al [23] investigated the axial compression behavior of seawater sea-sand concrete columns reinforced with fiber reinforced polymer (FRP) five-spiral stirrups, and this stirrup type could enhance the deformability of columns. Xiong et al [19] experimentally investigated the seismic behavior of seawater sea-sand concrete columns with various types of FRP stirrups and found that the five-spiral configuration of stirrups could significantly enhance the seismic performance of columns compared to the rectangular stirrups.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on the Seismic Behavior of Precast Concrete Beam-Column Joints with Five-Spiral Stirrups

Zheng,

Pan,

Zhen

et al. 2023

Buildings

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Precast concrete structure is a low-carbon building system that has been attracting extensive attention in recent decades. Beam–column joints are the weak links in precast concrete structures. Past studies showed that the five-spiral stirrups had excellent confinement effects and had the potential to enhance the seismic performance of concrete structures. This study proposed the reinforcement of precast concrete beam–column joints by using five-spiral stirrups and investigated their seismic performance. Considering the influences of the joint failure mode, joint type, construction method, and stirrup type, low-cycle loading tests were conducted on six full-scale precast concrete beam–column joint specimens. Various seismic behavior indicators, such as failure modes, hysteresis curves, skeleton curves, ductility, and energy dissipation, were obtained. The results indicated that the deformation capacity of the precast joints with five-spiral stirrups was comparable to that of cast-in-place joints. Under different failure design criteria, the seismic performance of the precast joints was superior to that of cast-in-place joints. Furthermore, the experimental capacities of the precast joints, using five-spiral stirrups, were higher than the calculated values according to the design code, demonstrating an adequate safety margin. This research contributes to the development of low-carbon and sustainable construction practices in the field of precast concrete structures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%