在役预应力混凝土桥梁的耐久性分析  

Durability for PC bridge structures

作　　者：王钧利[1] 

机构地区：[1]长安大学公路桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《混凝土》2006年第2期9-11,21,共4页Concrete

基　　金：国家西部交通建设科技项目(200231822329)

摘　　要：对在役预应力混凝土桥梁从预加力对构件的混凝土损伤和开裂带来的影响和混凝土性能的衰减、钢筋锈蚀的影响、钢筋性能的衰减,考虑混凝土收缩与徐变所产生的预应力钢筋松弛及使用荷载造成的疲劳应力等因素来分析对桥梁结构系统耐久性的影响。PC bridge structures have a fatal defect of poor durability due to internal factors of materials and environmental state, the mostly sides influence of the durability of PC bridge structures are analyzed. The studies on durability of bridge structures including concrete, rustiness of reinforcement steel, loss of pre-stress caused by shrinkage and creep of concrete, fatigue damnification and system durability of bridge structures. To ensure the durability of bridge structures, we must pay great attention to the design, construction and maintenance overall.

关 键 词：桥梁工程 在役预应力桥梁 钢筋锈蚀 预应力损失 疲劳应力 耐久性 

分 类 号：TU528.01[建筑科学—建筑技术科学]