预应力混凝土结构中考虑徐变的挠度计算实用方法

Practical computing method for long-term creep deflection of prestressed concrete structure

估算对梁施加预应力后产生的挠度值时考虑徐变因素在预应力结构设计中具有重要作用。对分离法和弯矩图法两种考虑徐变的快速计算挠度值方法进行了原理分析,并通过实例进行了详细介绍,结果表明两种计算结果相同。这两种计算方法在设计与分析预应力混凝土结构时能快速算出结果,无论在计算分析方面或是在设计方面都有着它自身的优越条件,有利于在实践中加以应用,因而值得大力推广。

Estimating the deflection of the prestressed concrete beam in consideration of long-term deflection is important for design.Analysed two convenient methods for computing the long-term deflection of prestressed concrete beam-separating method and bending moment method, showed the two method with example.The result showed two method have the same computing result. The two method can get the computing result fleetly for long-term deflection prestressed concrete structure, have the superiority for design and analyzing. So they have the evaluate to spread.