Seismic Resistance Analysis of Bearing Wall Building with Lap splicing Joint

Abstract

Currently, a large number of residential buildings are being constructed using precast concrete systems, particularly in Bangkok and its metropolitan areas. According to studies on active fault lines in Kanchanaburi Province, there is a significant risk of seismic activity that could cause considerable damage to life and property. However, research on the seismic behavior of low-rise precast concrete structures remains limited. This study aims to develop a modeling approach for assessing the seismic performance of precast concrete shear wall buildings, with a focus on lap-spliced welded reinforcement joints-a common construction practice in Thailand. The joint behavior in the model considers nonlinear material properties, including the bond characteristics of non-shrink grout and the multidirectional load resistance of the lap-spliced welded steel reinforcement. A plastic spring model was employed, and nonlinear analysis was conducted using the ETABS software. The results indicate that the proposed stress-strain material model and plastic spring representation can accurately predict the behavior of precast concrete shear walls. The modeled results correspond well with observed structural responses, demonstrating the applicability of the method for evaluating the seismic performance of precast concrete shear wall buildings.