Title: Verification of a simple model for the lateral-load analysis and design of unbonded post-tensioned precast concrete walls
Date Published: September - October 2018
Volume: 63
Issue: 5
Page Numbers: 51 - 70
Authors: Felipe J. Perez and Omar Mauricio
https://doi.org/10.15554/pcij63.5-01

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Abstract

Previous research on unbonded post-tensioned precast concrete walls included the development of a nonlinear wall model based on fiber elements and of a design-oriented simple analytical model based on generalized closed-form expressions that define a trilinear idealized wall response under combined gravity and lateral loads. Each model considers several key limit states in the lateral-load response of unbonded post-tensioned precast concrete walls. The fiber model and simple model were previously validated using limited available experimental results on unbonded post-tensioned precast concrete walls. This paper presents the results of a parametric study conducted using the fiber model and the simple model to investigate the adequacy of the simple model for a broader range of parameters. Results show that the simple model accurately represents the lateral-load response obtained using the fiber model. Furthermore, the simple model and the fiber model show similar values of base shear and roof drift response, and they show similar trends for each parameter variation. Thus, the simple model is recommended for the seismic design of unbonded post-tensioned precast concrete walls.

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