摘要
康富桥是一座异型钢管混凝土拱桥,该桥内拱外倾、外拱内倾,组合拱肋与系杆、横梁组成空间结构体系。该桥型较少见,为了了解该桥型的动力性能,需要对桥梁进行空间振动特性分析。采用ANSYS 软件建立该桥梁空间有限元计算模型,计算得到桥梁前15阶振动周期和振型。计算结果表明:该种桥型横向刚度较竖向刚度弱,桥梁低阶以拱肋横向振动为主。本文计算结果已为桥梁设计提供参考。
Kangfu bridge is an unusual concrete filled steel tubular arch bridge.Its inner arches lean outward and outer arches lean inward,which compose its combinational arch ribs and make up space structural system with tied beams and transverse beams.In order to acquire the dynamic behaviour of this type of bridge,its space dynamic characteristics of the bridge are needed to be analyzed here.According to the structural characteristics of the bridge,its space finite element model is set up.The first 15 periods and modes of the bridge are computed by the ANSYS program.The obtained results indicate that the transverse stiffness of the bridge is smaller than its vertical stiffness,and the transverse vibrations of arches are dominated in the main part of its lower order modes.The re- sults are referred in the design of the bridge.
出处
《世界地震工程》
CSCD
2003年第4期51-56,共6页
World Earthquake Engineering
基金
郑州大学和河南省高等学校创新学校创新人才资助项目(豫教高2001-53)
关键词
钢管混凝土拱桥
有限元方法
频率
振型
振动分析
concrete filled steel tubular arch bridge
finite element method
frequency
mode
