【摘要】 通过对盐水环境中经历了0、5、15、25次冻融循环的钢筋混凝土梁式试件的粘结性能试验,研究了冻融循环对钢筋与混凝土粘结性能的影响.结果表明,随冻融循环次数的增加,钢筋与混凝土的粘结强度降低;当冻融次数少于15次时,钢筋极限粘结荷载时的滑移变化不大,而冻融次数多于15次时滑移变化明显增大.所以,对于盐环境中经受冻融循环作用的钢筋混凝土结构,加强其耐久性设计非常重要.更多还原

【Abstract】 Study was made on effects of freezing and thawing cycles on bond characteristics between reinforcement and concrete using beam specimens that experienced 0,5,15 and 25 freezing and thawing cycles. It is shown that the bond strength between reinforcement and concrete decreases with the increase of freezing and thawing cycles. The slip of reinforcement corresponding to the ultimate bond strength changes slightly up to 15 freezing and thawing cycles and greatly more than 15 cycles. So it is important to the reinforced concrete structures exposed in salt environment and subjected to freezing and thawing cycles for the durability design.更多还原