钢-混凝土连续组合梁桥裂缝问题的研究综述

General Introduction of Study on Crack Problems of Steel Concrete Continuous Composite Beam Bridge

对钢-混凝土连续组合梁桥而言,负弯矩区混凝土板由于承受较大拉应力而开裂,从而引起钢筋及钢梁腐蚀等严重问题,影响了结构耐久性和承载能力。因此,负弯矩区混凝土板裂缝控制是设计中的重要一环,控制效果直接关系到结构的安全性和耐久性。该文结合最新的研究进展,对组合梁负弯矩区混凝土板的开裂特点、影响因素、裂缝宽度计算、裂缝控制措施等几个方面进行总结、阐述,希望能对连续组合梁桥负弯矩区的裂缝控制有所帮助。

Speaking the steel-concrete continuous composite beam bridge, the concrete slabs in the negative moment area are cracked because of bearing the larger tension stress so as to cause the serious problems of the steel reinforcement and steel beam corroded, which affect the durability and bearing capacity of the structure. Therefore, the control of concrete slab crack in the negative moment area is an important link in the design. The control result is directly related to the safety and durability of the structure. Combined with the latest study, the article sums up and sets forth the cracking characteristics, affecting factors, crack width calculation and crack control measures of the concrete slabs in the negative moment area of the composite beam, which hopes to give some help to control the cracks in the negative moment area of the continuous composite beam bridge.