详情

原文传递 Dynamic Response of the Suspension Spans of the San Francisco-Oakland Bay Bridge.

题名：	Dynamic Response of the Suspension Spans of the San Francisco-Oakland Bay Bridge.
作者：	Hutchings, L;Larsen, S;Astaneh-Asl, A;McCallen, D;
关键词：	Dynamic-responses; Bridges-.;Algorithms-; Cables-; Computer-codes; Design-; Earthquakes-; Ground-motion; Simulation-; Wave-forms; Taiwan-; Turkey-.
摘要：	The dynamic response of the suspension spans of the San Francisco-Oakland Bay Bridge (SFOBB) have been numerically modeled in a case-study to investigate the effects of long-period, near-field ground motions on flexible suspension bridges. The structural simulation model used in the study was developed as a special purpose computer program tailored to efficiently simulate the nonlinear response of cable supported bridges. The simulation model includes a number of special element technologies and solution algorithms that enable efficient nonlinear analysis of suspension bridges. The ground motions used in the study were site specific synthetic records for a Mw=7.25 earthquake along the Hayward fault at 12-15 km distant, and actual measured near-field records from the Izmit Turkey (1999) and Chi-Chi Taiwan (1999) earthquakes. These records include near- and far-field broad-band motions for three components. The results of the numerical simulations indicate that low frequency waveforms associated with near-field motions can place a significant demand on the structural systems of suspension bridges, and must be accounted for in suspension bridge analysis and design.
报告类型：	科技报告