先张法预应力混凝土应力传递解析

Analysis of Stress Transfer in Pre-tensioned Prestressed Concrete

针对先张法预应力混凝土应力传递理论研究的相关问题,基于厚壁圆筒理论,从弹性力学基础方程出发,对先张法预应力结构的应力传递进行模拟和计算,给出应力损失、传递长度、滑移距离和应力应变分布的解析解,并对不同计算方法进行数值比较。研究给出的公式解可直接应用于结构受力分析,也可为理论研究提供解析支撑。

Aiming at the problem of insufficient theory research on stress transfer of pre-tensioned prestressed concrete,an analytical model was developed based on basic equations of elasticity and the theory of thick-walled cylinder,to simulate and study the stress transfer in pre-tensioned prestressed concrete.The stress loss,transfer length,slip distance between strands and surrounding concrete,and the distribution of stress and strain in structures were computed analytically,and numerical results of different solutions were compared.Formulas derived in this study could be used directly for structure analysis and theoretical research.