铁道科学与工程学报2011，Vol.8Issue(6)：12-16,5.
基于反演理论在役连续刚构桥有效预应力识别
Effective pre-stress identification of the continuous rigid frame bridge in service based on inversion theory
摘要
Abstract
Due to the environment, climate, loads and other external factors, the pre - stress applied to the bridge is not constant. It is important for engineers to find out the accurate stress condition in order to ensure security of the bridge in service. To solve the problem mentioned above, according to actual monitoring displacement of the bridge in service at different time, the effective pre - stress is obtained by the displacement inversion method based on the inversion theory. Lastly, taking the pre - stressed concrete continuous rigid frame bridge for example, the finite element model with different effective pre - stress is established and the strength and stiffness are analyzed under design load. It is shown from the comparison results of analytical displacements and measured ones that the inverse method is an effective way to predict reasonable pre - stress for the bridge in service.关键词
连续刚构桥/反演理论/目标函数/有效预应力/识别Key words
continuous rigid frame bridge/ inversion theory/ object function/ effective pre - stress/ identification分类
建筑与水利引用本文复制引用
张兆宁,贺拴海,赵煜..基于反演理论在役连续刚构桥有效预应力识别[J].铁道科学与工程学报,2011,8(6):12-16,5.基金项目
国家自然科学基金资助项目(50908017) （50908017）
