Seismic energy dissipation in bridges with air springs

被引：0
|
作者：
Sherafati, A. [1 ]
Ahmadi, F. [2 ]
Maleki, S. [3 ]
机构：
[1] Univ Nebraska, Dept Civil Engn, Lincoln, NE 68588 USA
[2] Univ Texas Austin, Dept Civil Engn, Austin, TX 78712 USA
[3] Sharif Univ Technol, Dept Civil Engn, Room 431,POB 11155-9313, Tehran, Iran
来源：
SCIENTIA IRANICA | 2015年 / 22卷 / 06期
关键词：
Bridges; Seismic effects; Energy dissipation; Dampers; Air springs; PERFORMANCE; SYSTEM;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Seismic loads on bridges may cause large damaging forces in substructure. Isolation and energy dissipating elements or a combination of the two have been used to reduce the transmitted forces caused by seismic loading. The benefits of these systems are mainly attributed to the increase of structure's natural period of vibration and damping. This paper investigates a new device that works on the same principles. This device is composed of sliding bearings and air springs or airbags. Several bridges are analyzed using the Nishimura's model for air springs; and the sensitivity of seismic response of bridges due to variable spring parameters is investigated and optimum values are obtained. Then, using these parameters for the air spring and solving the equation of motion, the variation of air spring internal parameters with time are investigated. Results show that air springs are very efficient in reducing the effects of seismic forces. (C) 2015 Sharif University of Technology. All rights reserved.
引用
收藏
页码：1954 / 1963
页数：10
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