摘要
为探究新型钢阻尼装置对斜拉桥横向抗震的影响,以广东榕江大桥为工程背景,设计了1∶20的缩尺试验模型,并开展了4台阵振动台试验。试验结果表明:新型横向钢阻尼体系比横向固结体系一阶频率低;新型横向钢阻尼体系相比横桥向固结体系能有效地减小结构的位移反应及加速度反应,且随着地震动峰值加速度的增,减震效果越加明显,证明横向钢阻尼体系是合理的。因而,选择合适的钢阻尼装置可以提高斜拉桥的抗震性能。
In order to study the influence of a new type lateral steel damping device on the seismic performance of the cable - stayed bridge, a 1 ： 20 scaled test model of Guangdong Rongjiang river Bridge was designed, constructed and tested on four shaking tables system. The results show that the fundamental frequency of the system with new type lateral steel damping devices is lower than that of transverse consolidation system. Compared to transverse con- solidation system, the lateral steel damping device can reduce the peaks of structural displacement responses and ac- celeration responsesmore effectively. With increase of peak seismic acceleration, the damping effect is more obvi- ous. It is proofed that the system with new type lateral steel damping device is reasonable. Therefore the appropri- ate lateral steel damping device may be chosen to improve the seismic performance of cable-staved bridge.
出处
《世界地震工程》
CSCD
北大核心
2015年第4期43-49,共7页
World Earthquake Engineering
关键词
斜拉桥
振动台试验
横向钢阻尼装置
横向固结体系
抗震性能
cable-stayed bridge
shaking table test
lateral steel damping device
transverse consolidation system
seismic performance
