Shake-Table Tests and Numerical Analysis of Self- Centering Prestressed Concrete Frame

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Title: Shake-Table Tests and Numerical Analysis of Self- Centering Prestressed Concrete Frame

Author(s): Tong Guo, Yaowen Hao, Lianglong Song, and Zhiliang Cao

Publication: Structural Journal

Volume: 116

Issue: 3

Appears on pages(s): 3-17

Keywords: concrete frame; numerical simulation; post-tensioning; seismic performance; self-centering; shake-table test

Date: 5/1/2019

Abstract:
This paper presents the shake-table tests and numerical analysis of a self-centering prestressed concrete (SCPC) frame to evaluate its seismic performance. The SCPC frame uses unbonded post-tensioned (PT) beam-column and column-foundation connections to provide the re-centering capability. Web friction devices are used at the beam ends to provide the adjustable energy dissipation capacity. A 0.5-scale, one-by-two bay, two-story specimen frame was designed and tested on a shake table under various ground motions with increasing intensities. The test results indicate that the SCPC frame had satisfactory seismic performance, and a desirable re-centering capability was observed with little structural damage even under severe earthquakes. An analytical model of the SCPC frame was also developed using the Open System for Earthquake Engineering Simulation (OpenSees) to replicate the test results. Good correlation is observed between the analytical and test results, indicating that the proposed model can be used to study the behavior of such self-centering (SC) structures.