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
DOI:
10.14359/51714472
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.
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