非连续弯曲孔道摩阻预应力损失研究  

Study on Frictional Prestress Loss of Discontinuous Curved Channel

作　　者：张开银[1] 王湃 张斌[1] ZHANG Kaiyin;WANG Pai;ZHANG Bin(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程,武汉430063

出　　处：《武汉理工大学学报（交通科学与工程版）》2022年第4期682-686,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：针对规范中对接触应力均匀分布的假设并不成立.基于弹性理论,认为接触应力为非均匀分布,并采用二次曲线作为新假设进行模拟,推导得到新的弯曲孔道摩阻计算公式.根据新公式进行模拟计算,对比现行桥梁设计规范中弯曲孔道摩阻预应力损失的结果,并在实际桥梁的预应力损失实验中也验证了公式的合理性.In view of the inapplicability of the standard formula of prestress loss caused by frictional resistance of curved channels in the current code in discontinuous curved channels,it is considered that the assumption of uniform distribution of contact stress in the code is not valid.Based on the elastic theory,the contact stress was considered to be non-uniform distribution.The quadratic curve was used as a new hypothesis for simulation,and a new formula for calculating the friction of curved channels was derived.According to the new formula,the simulation calculation was carried out,and the results of frictional prestress loss of curved channel in the current bridge design code were compared.The rationality of the formula was verified by the actual bridge prestress loss experiment.

关 键 词：预应力混凝土桥梁 预应力损失 摩擦阻力 非连续弯曲孔道 

分 类 号：TU378[建筑科学—结构工程]