新型钢阻尼滑板支座梁桥振动台模型试验研究

摘要

Seismic dissipation and isolation effect of a new steel damping slide bearing was analyzed in this paper. A two-span simply supported girder bridge with a continuous deck was taken as research background project. A shaking table test of the bridge model was conducted using a three-shaking table system. Three bearings were analyzed including ordinary laminated rubber bearing,high damping rubber bearing and steel damping slide bearing. The results show that when the earthquake dynamic peak is small( E1 earthquake action) ,seismic dissipation and isolation effects of steel damping slide bearing and high damping rubber bearing are close and outweigh ordinary laminated rubber bearing. As the earthquake dynamic peak increases( E2 earthquake action) ,steel damping slide bearing outweighs the other two bearings in terms of seismic dissipation and isolation effect. The experimental test verified the feasibility of application of steel damping slide bearing into simply supported girder bridges with a continuous deck.%为了探究新型钢阻尼滑板支座的减隔震效果，以一2跨桥面连续简支梁桥为工程背景，设计了振动台试验模型并开展三台阵振动台试验，比较研究了普通板式橡胶支座、高阻尼橡胶支座、钢阻尼滑板支座3种支座的减隔震效果。结果表明：地震动峰值较小时( E1地震作用)，钢阻尼滑板支座和高阻尼橡胶支座的减隔震效果接近，且均优于板式橡胶支座；地震动峰值越大( E2地震作用)，钢阻尼滑板支座的减隔震优势越突出，其减隔震效果优于高阻尼橡胶支座，且两者均优于板式橡胶支座。试验验证了钢阻尼滑板支座在桥面连续简支梁桥中减隔震性能的可行性。