钢管混凝土(单圆管)拱肋刚度对其动力特性的影响  

Effect of rigidities of concrete filled steel tubular (single tube) arch rib on its dynamic characteristics

作　　者：陈宝春[1] 韦建刚[1] 

机构地区：[1]福州大学土建学院,福建福州350002

出　　处：《地震工程与工程振动》2004年第3期105-109,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50078016)

摘　　要：钢管混凝土的截面刚度应用不同的规范计算的结果之间存在着差异。本文以一座实桥为研究对象,讨论了这种差异对钢管混凝土拱桥动力特性的影响。分析表明,不同规范引起的钢管混凝土拱肋刚度的计算值的不同对钢管混凝土拱桥动力特性计算结果的影响较小。对自振频率,抗弯刚度取值的变化有一定的影响,但抗压刚度的影响极小;对自振振型,抗弯与抗压刚度取值的变化均无影响。The rigidities of CFST members calculated by different codes or specifications have different values. The effect of the differences of rigidities on the dynamic characteristics of the CFST arch bridge is discussed. Analytical results show that the different values of the rigidities of CFST arch rib according to different codes do not influence the calculation results of the dynamic characteristics of the CFST arch bridge very much. For natural-frequency, the different value of flexural rigidity will influence it in some degree, but that of the compressive one almost does not influence it. And both the differences of the flexural and compressive rigidities do not change the vibration mode.

关 键 词：钢管混凝土 拱刚度 动力特性 

分 类 号：TU399[建筑科学—结构工程] P315.96[天文地球—地震学]