山区桥梁的抗震概念设计  

Seismic conceptual design for mountain bridges

作　　者：宋晓东[1] 李建中[1] 

机构地区：[1]同济大学桥梁系,上海200092

出　　处：《地震工程与工程振动》2004年第1期92-96,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家科学自然基金项目(50278068)

摘　　要：山区桥梁因为地形和施工条件等的限制,给设计带来很大的问题,使得结构不规则,影响了桥梁的抗震能力。且由于山地震动效应等复杂因素的影响,该类桥梁的抗震计算往往不能很好地反映真实的地震反应。概念设计通过长期积累的实际设计经验和理论研究的成果,从总体上把握设计的原则,是非常重要和有意义的。本文针对山区桥梁的特点,对山区桥梁的抗震概念设计方法进行了探讨。Because of complex topography of bridge site, mountain bridges are often designed with unconventional configuration. Unconventional configuration debases their earthquake resistant ability. Adding to multiple complex factors′ affection, such as uncertain ground motion input, it is difficult to accurately evaluate mountain bridges′ seismic response. Conceptual design is an outcome of accumulation of long time design experiences and theory investigation, it can guide seismic design in general.Apparently, seismic conceptual design is important for mountain bridges. This paper aims at mountain bridge's character and investigates important factors of bridge seismic conceptual design.

关 键 词：山区桥梁 抗震概念设计 抗震能力 地震动 

分 类 号：P315.9[天文地球—地震学]