WANG Zhenyu,LIU Hongtao,DU Xiuli.Study on Seismic Performance of Dry‑connected Precast Shear Walls with Vertical Seams[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(03):571-583.
WANG Zhenyu,LIU Hongtao,DU Xiuli.Study on Seismic Performance of Dry‑connected Precast Shear Walls with Vertical Seams[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(03):571-583. DOI: 10.13409/j.cnki.jdpme.20240105001.
Study on Seismic Performance of Dry‑connected Precast Shear Walls with Vertical Seams
Vertical joints between adjacent precast wall panels are dry-connected using high-strength bolts and embedded steel plates. This method features simple construction
convenient operation
and direct force transfer. To study the seismic performance of dry-connected precast shear walls with vertical joints
one cast-in-place wall and four dry-connected precast walls were subjected to low-cycle reversed loading tests. The failure mode
hysteretic characteristics
stiffness degradation
energy dissipation capacity
and connection characteristics of different types of vertical joints were studied. The results indicated that the dry-connected vertical joints could effectively transfer shear forces between the left and right wall limbs of precast shear walls
enabling the wall panels to meet design load-bearing requirements while demonstrating good ductility and energy dissipation capacity. However
the failure pattern of precast walls was different from that of cast-in-place walls
with more widely distributed crack zones due to the influence of vertical joints
and the energy dissipation capacity of walls was enhanced. With the increase of vertical joint connection strength
the strength and stiffness of the precast walls approached those of cast-in-place walls. The inter-story deformation of dry-connected precast walls with vertical joints was mainly composed of bending and shear deformations
with the ultimate drift ratio exceeding the limit value of elastic-plastic inter-story drift ratio specified in the code (1/120)
and displacement ductility coefficient ranging between 5.1 and 7.4
exhibiting good deformation and collapse resistance. In addition
raising the position of the vertical joints could effectively improve joint connection efficiency
enhance wall integrity and energy dissipation capacity
and reduce construction costs. Therefore
it was recommended to position the joints in the upper-middle section of wall panels in engineering practice.
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