作　　者： ; ;

机构地区： 同济大学土木工程学院桥梁工程系

出　　处： 《同济大学学报（自然科学版）》 2007年第6期724-727,共4页

摘　　要： 针对斜拉桥和矮塔斜拉桥的特点,研究了均布荷载作用下索梁的荷载响应,提出索梁活载比概念,并推导出计算公式,比较了该公式和有限元计算结果.结合国内已建斜拉桥和矮塔斜拉桥,提出按索梁活载比来界定斜拉桥和矮塔斜拉桥.研究表明,索梁活载响应能表征结构特性,对于研究其力学行为很有意义. According to the characteristics of cable-stayed bridges and extradosed cable-stayed bridges, the concept of cable/beam live-load ratio is introduced to analyse the response of cable and beam under uniform live load. The formulation of cable/beam live-load ratio is deduced and whose result is compared with that of finite element method（FEM）. Domestic practices are used to analyse the cable/beam live-load ratio which is proposed to distinguish cable-stayed bridge and extradosed cable-stayed bridge. It is proved that the response of cable and beam under live load reflects structure trait and is meaningful for future research.

关 键 词： 矮塔斜拉桥 斜拉桥 应力幅 索梁活载比 响应 有限元

领　　域： [建筑科学] [交通运输工程] [建筑科学] [交通运输工程]