Seismic damage control of steel bridge piers by adding low-yield-point steel (LYPS) plates

Yi Zheng; Masato Abe; Yozo Fujino; Krzystof Wilde

doi:10.1117/12.310597

17 June 1998 Seismic damage control of steel bridge piers by adding low-yield-point steel (LYPS) plates

Yi Zheng, Masato Abe, Yozo Fujino, Krzystof Wilde

Proceedings Volume 3325, Smart Structures and Materials 1998: Smart Systems for Bridges, Structures, and Highways; (1998) https://doi.org/10.1117/12.310597
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

Bridge piers with steel hollow box sections are widely used in Japan for highway bridges. Unlike the steel columns in buildings, these piers are designed with high width-thickness ratios of component plates. This makes them susceptible to damage during severe earthquakes. In order to improve the seismic performance, an energy absorption strategy which localizes damage in structural systems is proposed: concentrating damage in specially designed weak structural elements, with which energy is absorbed during earthquake. Here, Low yield point steel (LYPS) plates attached to steel pier are employed as the weak elements. LYPS is a new kind of material which has low yield stress (around 100 MPa), large ductility and adequate fatigue life. In case of earthquake events, LYPS plates yield to absorb energy and keep the main structure always elastic. In this way, damage is concentrated in LYPS plates which can be easily replaced after earthquake. The paper starts with construction of constitutive model of LYPS with verification by experiment. The energy absorption performance of LYPS plates is studied by 3-dimensional finite element analysis (3DFEM), and optimal design method is proposed.

Citation Download Citation

Yi Zheng, Masato Abe, Yozo Fujino, and Krzystof Wilde "Seismic damage control of steel bridge piers by adding low-yield-point steel (LYPS) plates", Proc. SPIE 3325, Smart Structures and Materials 1998: Smart Systems for Bridges, Structures, and Highways, (17 June 1998); https://doi.org/10.1117/12.310597

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