人行天桥的舒适度分析与TMD减振控制

Comfort Analysis and TMD Vibration Control of Pedestrian Bridge

为对比分析国内外规范对人行天桥舒适性评价的差异性,以海口市一座普通钢筋混凝土的海府天桥为例,依据各国规范建立了单人、结伴而行、低密度0.5人/m^2、高密度1.5人/m^2等8种人行荷载工况,进行舒适度评价,并对不满足舒适度要求的工况,采用TMD减振。结果表明:ISO和EN03规范对人行桥舒适度评价较为严格,TMD减振效果显著,合理选择TMD装置数量对减振效果有益。

To compare and analyze differences between domestic and foreign specifications on comfort evaluation of pedestrian bridges.In this paper,a common Haifu flyover of ordinary reinforced concrete in Haikou city is taken as an example,according to the national standards,eight kinds of pedestrian load conditions,such as single person,companionship,low density of 0.5 person/m^2,high density of 1.5 person/m^2 are established,and the comfort evaluation is carried out.TMD damping is used for conditions that do not meet the comfort requirements.The results show that the ISO and EN03 specifications are more stringent in evaluating the comfort of the footbridge,and the TMD damping effect is significant.Reasonable selection of the number of TMD devices is beneficial to the vibration damping effect.