摘要
针对悬臂工法建造的大跨度梁桥跨中过度下挠问题,从混凝土的收缩徐变、温度交变和活载疲劳、裂缝三个方面阐述了跨中下挠的机理,并提出了四种解决此问题的方法。
Aiming at the problem of excessive deflection in the midspan of long-span girder bridges constructed by cantilever construction method, there are three reasons,shrinkage and creep of concrete,temperature alternation,live load fatigue and cracks.four methods are provided.
作者
潘振宇
PAN Zhenyu(Shandong Jiaotong University,Jinan 250357,China)
出处
《四川建材》
2019年第5期172-173,共2页
Sichuan Building Materials
关键词
大跨度预应力混凝土梁桥
跨中下挠
混凝土的收缩徐变
long span prestressed concrete beam bridge
midspan deflection
shrinkage and creep of concrete