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本文对中美钢筋混凝土桥梁裂缝控制的理念和方法进行了比较,并以我国桥梁规范初步设计的某钢筋混凝土桥梁为计算基础,采用《公路钢筋混凝土及预应力混凝土设计规范》(JTG D62-2004)及美国AASHTO LRFD公路桥梁设计规范(2012)规范对该桥裂缝控制进行了定量分析。结果表明:对于同一座桥梁,在相同环境下,裂缝宽度满足AASHTO LRFD公路桥梁设计规范时,却不能满足我国现行桥梁规范要求,我国桥梁规范对裂缝控制较美国更为严格。
This paper compares the concept and method of crack control between China and the United States reinforced concrete bridges. Based on the calculation of a reinforced concrete bridge initially designed by our country’s bridge norms, the “Code for Design of Highway Reinforced Concrete and Prestressed Concrete” (JTG D62-2004 ) And the United States AASHTO LRFD Highway Bridge Design Code (2012) specification for quantitative analysis of the bridge crack control. The results show that for the same bridge, under the same conditions, the crack width meets the AASHTO LRFD highway bridge design code, but it can not meet the current bridge specifications in our country. Our bridge specifications control cracks more severely than the United States.