Title:
Effect of Connections on the Performance of Precast Coupled Structural Walls (Prepublished)
Author(s):
Selva Ganesa Moorthi A. and G. Appa Rao
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
connection position; coupled wall; ductile connection; precast structural wall; quasi-static load; reinforced concrete; seismic resistant
DOI:
10.14359/51746756
Date:
4/9/2025
Abstract:
This paper discusses the seismic performance of precast coupled structural walls with the influence of connections and their location. Full-scale quasi-static tests were conducted on the coupled structural walls by varying the number of connections. The test results show that the number of connections and their position along the height of the coupled wall significantly influence the lateral strength, stiffness, energy dissipation, and failure modes. Walls with two connections seem to improve the strength and hysteretic response, exhibiting superior cyclic performance. Increasing the number of connections improves the initial stiffness to a certain extent, but the designs are expensive. Walls with connections closer to lateral loading lines exhibit vulnerability, requiring design to optimize energy dissipation and crack control. Connections with over-strength may need to be avoided as they may not increase the energy dissipation under earthquake loading. The outcomes of the study help in designing precast systems with better seismic resilience, good ductility, and ease of replacement after an earthquake hits the system.