部分预应力混凝土梁疲劳极限应力分析

【作者】 宋玉普； 董梁；

【机构】 大连理工大学海岸与近海工程国家重点实验室；

【摘要】 按照现有的设计方法一般都假设有粘结部分预应力混凝土受弯构件中的普通钢筋和预应力筋同时达到屈服;本文从静载和疲劳实验两方面分析了预应力混凝土梁疲劳下极限应力,特别注重在疲劳状态下对钢筋和预应力筋强度利用的情况。总结了在不同的配筋率和预应力度下部分预应力混凝土梁中普通钢筋和预应力筋的屈服情况。更多还原

【Abstract】 According to present design method, common steel bar and prestressed tendon in bonded-prestressed concrete structural member under bending are generally supposed to reach the yield strength at the same time. Based on the dead load test and fatigue test, this thesis analyzes the ultimate stress of the prestressed concrete beam under fatigue, and lays a strong emphasis on the utilization of the intensity of steel bar and prestressed tendon under fatigue. The thesis concludes different conditions of yield strength of steel in common steel bar and prestressed tendon given different ratio of reinforcement and degree of prestress更多还原