摘要
阐述了钢筋混凝土结构在荷载作用下裂缝产生的机理和理论以及我国现行设计规范中关于裂缝宽度的计算,分析了影响荷载裂缝宽度的主要因素和裂缝对结构耐久性的影响。结果表明:钢筋混凝土结构表观横向荷载裂缝宽度理论计算值虽随受拉区钢筋的直径和混凝土保护层厚度的增大及配筋率的减小而增大,但该种裂缝对结构耐久性的影响却较小,通过适当增大混凝土保护层厚度更有利于提高结构的耐久性。
To elaborate the crack-produced mechanism and theory of the reinforced concrete structure under load crack as well as the current design codes of our country on the crack width calculation, and to analyze of the influence of crack on the durability and the main factor of the influence on load crack width. The result shows that, the theoretical value of apparent transverse crack width of reinforced concrete structure increases when the diameter of reinforcement of tensile region and the thickness of concrete cover increase or reinforcement ratio decreases, but the influence of this crack about durability of structure is smaller. The proper increase of the thickness of concrete cover will be better to the durability of structure.
出处
《土木工程与管理学报》
2013年第1期10-15,共6页
Journal of Civil Engineering and Management
基金
浙江省重点科技计划项目(2006C24008)
