Seismic Performance Comparison of Precast Bridge Columns with Different Shear Span-to-Depth Ratios and Connection Designs via Quasi-Static Cyclic Test
Publication: Journal of Bridge Engineering
Volume 27, Issue 10
Abstract
In this study, seven one-third-scale bridge column specimens are tested via a quasi-static cyclic test to understand seismic performance differences between cast-in-place (CIP) and precast bridge columns with various shear span-to-depth ratios and connection design details. The columns are designed based on practical engineering application, which aims to provide design reference for the seismic behavior of real-world bridge structures with varying column heights, such as bridge ramps. Based on the test results, it was found that column height exceeding the plastic hinge region is of combined bending and shear failure and that the full development of the plastic hinge region of these columns yields the same damage progression. However, short columns that are lower than the height of the plastic hinge are subjected to pure shear failure, and they are also of the same level of seismic performance except for displacement-related indices. Though the strengthening effect of the grouted splice sleeve connections is observed and damage is more concentrated at the joint for precast bridge columns, the difference of overall seismic performance between CIP and precast bridge columns is less than 5% in terms of ductility and energy dissipation. The addition of shear keys or change of bond material help improve the structural integrity, while the increase of seismic performance is still limited.
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Acknowledgments
Financial support for this study is provided in part by the National Key R&D Program of China (No. 2021YFF0502200), National Natural Science Foundation of China under Award (Nos. 51978511, 51778470, and 52008316), and the Science and Technology Commission of Shanghai Municipality under Award of Natural Science Foundation (No. 20ZR1461400) and Pujiang Program (No. 20PJ1413900).
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Published In
Journal of Bridge Engineering
Volume 27 • Issue 10 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Dec 17, 2021
Accepted: Apr 1, 2022
Published online: Aug 3, 2022
Published in print: Oct 1, 2022
Discussion open until: Jan 3, 2023
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