哈尔滨工程大学学报2012，Vol.33Issue(2)：155-159,5.DOI:10.3969/j.issn.1006-7043.201010032
斜度对斜交桥地震作用下的扭转效应影响
Torsion effects of skew angles on skew bridges during earthquakes
摘要
Abstract
To meet the requirement of traffic lines, skew bridges sometimes cannot be avoided. In comparison with orthogonal bridges, there is a tendency for torsion damage of skew bridges during earthquakes. As the main characteristic parameter for skew bridges, the skew angle may have a significant effect on torsion damage of skew bridges during earthquakes. However, this theory has not been confirmed and there are several existing opinions. In this paper, a real bridge was used as the prototype, and bridge models with different skew angles were developed. The torsion effects of the skew angle on skew bridges during earthquakes were studied using the modal analysis and nonlinear time history analysis methods. From the research, it can be found that by increasing the skew angle, the ratio for the torsion period and translation period will increase linearly, and the torsion stiffness will decrease. The torque of piers under earthquakes will also increase with the increase of the skew angle. For the torsion displacement of the superstructures, if the width of expansion joints is enough to avoid the collision between superstructures and abutments , the increase of the skew angle will not result in torsion displacement of superstructures; on the other hand, if a collision between superstructures and abutments takes place, torsional displacement of superstructures under earthquakes will increase with the increasing of the skew angle.关键词
斜交桥/斜度/扭转/相对位移/碰撞/地震Key words
skew bridge/ skew angle/ torsion/ relative displacement/ collision/earthquake分类
交通工程引用本文复制引用
卢明奇,杨庆山,李英勇..斜度对斜交桥地震作用下的扭转效应影响[J].哈尔滨工程大学学报,2012,33(2):155-159,5.基金项目
国家自然科学青年基金资助项目(51008013) （51008013）
山东省交通科技计划资助项目(2009Y007) （2009Y007）
中央高校基本科研业务费专项基金资助项目(2009JBM060). （2009JBM060）
