摘要
针对一座服役40余年的钢筋混凝土旧拱桥,根据模型相似理论制作了有机玻璃缩尺拱桥模型。利用拱肋截面切口以模拟拱肋截面的损伤,对各损伤模型进行了静力载荷实验研究,得到拱肋的变形和应变分布规律。讨论了损伤程度及损伤位置对拱桥力学性能的影响。研究表明,拱顶截面的静力变形对于损伤表现出一定的敏感性,而拱肋1/4跨、3/4跨截面的变形与损伤位置有关。拱肋损伤位置附近的应变对损伤是敏感的,但对于损伤程度的变化反映不明显。
Based on an old reinforced concrete arch bridge,which has been in-service for about 40 years,a scaled one-span bridge model was fabricated by organic-glasses.Notches were made on the arch ribs to simulate the damage.Static experiments were executed on the undamaged and damaged model.Deformations and strain distribution of the arch ribs were obtained.Effects of the damage extent and location on the mechanical response of the bridge models were discussed.It was discovered that the mid-span deformation was sen...
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2008年第3期74-78,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50708010)
吉林省公路交通厅资助项目(2002-1-06)
辽宁省博士启动基金(1050259)
关键词
拱桥
有机玻璃
损伤
应变
模型试验
arch bridge
organic-glasses
damage
strain
model test
