Performance of Seismic-Isolated Bridges in Relation to Near-Fault Ground-Motion and Isolator Characteristics  

Oleh:

Dicleli, Murat

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Earthquake Spectra: The Professional Journal of the Earthquake Engineering Research Institute vol. 22 no. 4 (Nov. 2006), page 887-907.
Topik: seismic-isolated bridges; SIBS; near-fault (NF) earthquakes; forward rupture directivity effect; FRDE

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: EE41 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

This paper investigates the performance of seismic-isolated bridges (SIBS) subjected to near-fault (NF) earthquakes with forward rupture directivity effect (FRDE) in relation to the isolator, substructure, and NF earthquake properties, and examines some critical design clauses if AASHTO's Guide Specifications ,for Seismic Isolation Design. It is found that the SiB response is a function of the number of velocity pulses, magnitude of the NF ground motion, and distance from the fault. Particularly, a reasonable estimation of the expected magnitude of the NF ground motion according to the characteristics of the bridge site is crucial for a correct design of the SiB. it is also found that the characteristic strength and post-elastic stiffness of the isolator may be chosen based on the characteristics of the NF earthquake. Furthermore, some of the AASHTO clauses are found to be not applicable to SI Bs subjected to NF ground motions with FRDE.

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