大跨度桥梁数字强震动监测系统研究

国内外近几十年来的破坏性地震震害表明，强烈地震是导致桥梁结构严重破坏甚至倒塌的主要原因之一。鉴于特大桥梁的运营安全性和结构重要性，许多国家加强了桥梁强震的观测和研究。我国是世界上地震灾害最严重的国家之一，2008年5月12日，四川汶川发生8.0级大地震，6140座桥梁受损。对桥梁进行强震观测，实时监测桥梁结构受震动情况，及时有效地组织抗震救灾，并为桥梁抗震设计规范提供科学依据，将对生命安全和减少财产损失非常重要。本文基于悬索桥的地震响应分析，探讨了大跨径桥梁数字强震动监测系统方案，以期为桥梁的地震灾害预防、工作状态诊断和病害处治提供帮助。

Research of digital strong motion monitoring system of long-span bridges

In recent decades of strong earthquake damage at home and abroad indicates that a strong earthquake is one of the main reasons to make the structure of a bridge to destroy seriously or even collapse. In view of operation security and structure importance of the large bridge, many countries have stepped up the observation and research.of a bridge in earthquake. China is one of the worst earthquake disaster countries in the world, on May 12, 2008, 8.0 degree earthquake occurred at Wenchuan county in Sichuan province, which damaged 6140 bridges. It is very important for people’ savety and property that observing the bridge in earthquake and monitoring the shocking status of the bridge structure real-time, which will give a organization in earthquake relief timely and effectively, also will provide a scientific basis to the bridge seismic design. Based on the response to the earthquake analysis of cable bridge, this article discuss digital strong motion monitoring system program on long-span bridges, in order to provide some help in earthquake disaster prevention, work-state diagnosis and disease treatment for the bridge.