Analytical Investigation of Seismic Performance of Viaduct Bridge System with Seismic Isolation Bearing and another with Hybrid Rigid Frame Connection  

Oleh:

Sehnawi, R. Al ; Nakajima, A. ; sadeq, H. Al

Jenis: Article from Proceeding
Dalam koleksi: Proceeding The 1st International Conference on Sustainable Civil Engineering Structures and Construction Materials (SCESCM) di Yogyakarta, September 11 – 13, 2012, page 90-97.
Topik: Viaduct bridge system; Push-over analysis; Nonlinear dynamic analysis; LRB; Hybrid rigid frame connections.
Fulltext: 11.pdf (516.84KB)

Isi artikel

In this paper, numerical analysis was conducted to investigate the longitudinal seismic behavior of viaduct bridge system with seismic isolation bearings (LRB) and another with hybrid rigid frame connection under moderate and severe earthquake motions by focusing on strain response at the pier base and on the bearing displacement. The bridge model has three continuous spans with two fixed RC piers, and two abutments. First, an iterative calculation based on push-over analysis was performed for an optimal seismic design of the cross-section at the pier base for the two prototypes and of the seismic isolation bearings. Thereafter, a comparison study has been made by conducting nonlinear dynamic analysis for the two previous designed bridge prototypes. In addition to stiff soil conditions, the soft soil conditions also were considered to investigate the effects of long-period earthquake motion, thus the seismic performance of the designed bridge prototypes was compared with each other. Lastly, the pier cross sections of the two prototypes and the seismic isolation bearings of viaduct bridge system with seismic isolation bearings were redesigned, by conducting an iterative calculation of dynamic analysis, in order to compare between the static and dynamic analysis methods.

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