摘要
自振特性是反映桥梁动力特性的主要模态参数,包括自振频率和振型,反映出桥梁的刚度指标,是评价桥梁动力性能的主要依据。文中采用MIDAS有限元程序,建立跨径为132m的钢管混凝土系杆拱桥三维空间模型,对全桥开展动力特性分析,并通过脉动试验对理论分析进行校核,结果表明实测值与理论计算值吻合良好。
Vibration characteristics including natural frequency and vibration mode are the principal modal parameters reflecting the structure dynamic behavior and the structural stiffness indexes and are the important basis for evaluating bridge dynamic performance. A three-dimensional finite element model of Shiqiao Canal Bridge which is a long-span concrete-filled steel pipe arch bridge with 132 m main span was created by using MIDAS software and the dynamic performance is analyzed. And the ambient test is used to check and test the theoretical analytic results. The comparison results show that the analytic results agree well with the experimental ones.
出处
《交通科技》
2013年第5期7-9,共3页
Transportation Science & Technology
关键词
施桥运河大桥
钢管混凝土系杆拱桥
动力特性
有限元模型
shiqiao canal bridge
steel pipe concrete tied arch bridge
dynamical characteristic
finiteelement model
