混凝土结构人行天桥减振加固技术研究  

Study on Vibration Reduction and Reinforcement Technology of Pedestrian Bridge with Concrete Structure

作　　者：曹文[1] 陈舜东[1] 邱珂[1] 李冰 CAO Wen;CHEN Sundong;QIU Ke;LI Bing(China Railway Southwest Research Institute Co.Ltd.,Chengdu Sichuan 611731,China)

机构地区：[1]中铁西南科学研究院有限公司,四川成都611731

出　　处：《铁道建筑》2018年第4期45-48,共4页Railway Engineering

摘　　要：当人行天桥舒适度偏低时,尽管结构强度满足要求,但是由于结构共振引起的加速度、振幅过大,超过人体舒适度耐受极限,极易在人的心理上造成恐慌。本文以某钢筋混凝土结构人行天桥加固工程为依托,利用有限元软件对桥梁舒适度进行了分析,针对桥梁结构特点和存在问题提出了减振加固方案,并对其动力特性进行了计算和对比。最后对加固后桥梁舒适度进行了现场实测,试验结果表明采用调谐质量阻尼器可有效提高混凝土结构人行天桥舒适度。When the comfort degree of pedestrian bridge is low,although the structural strength meets the requirements,the amplitude of acceleration caused by structural resonance is too large,exceeding the tolerance limit of human comfort and tolerance,it is easy to cause psychological panic.Based on the reinforcement project of a reinforced concrete pedestrian bridge,the comfort degree of the bridge was analyzed in this paper.According to the characteristics and existing problems of the bridge structure,a scheme of vibration reduction and reinforcement was put forward.The dynamic characteristics of the structure were calculated and compared.The comfort degree of the reinforced bridge was evaluated.The test results show that the tuned mass damper can effectively improve the comfort degree of pedestrian bridge with concrete structure.

关 键 词：人行天桥 调谐质量阻尼器 数值计算 现场实测 减振加固 舒适度 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]