竖向集中荷载作用下体外预应力混凝土连续梁解析解

Vertical Concentrated Load Externally Prestressed Concrete Continuous Beam Analytical Solution

在预应力混凝土桥梁加固中,体外预应力的应用逐渐广泛.本文主要基于微分方程,推导了体外预应力连续梁在竖向集中荷载作用下力法方程的解析解.利用该理论,计算了在竖向集中荷载作用下的挠度沿梁长的分布曲线,并与Ansys数值分析结果进行了对比,二者具有较好的一致性,说明该计算结果是合理的,可信的.对比结果表明,采用该解析解并能够得到在正常使用状态下混凝土梁的变形情况,为今后分析碳纤维加固体外预应力连续梁提供了基础.

In the prestressed concrete bridge reinforcement, the application of the external prestressed gradually widely. This paper mainly based on differential equation deduced the external prestressed continuous beam in the vertical concentrated load dint method, the analytical solution of the equation. Using this theory calculation in the vertical deflection under concentrated load along the beam long distribution curve and Ansys numerical analysis re- suits are compared, and both have good consistency, it is shown that the result is reasonable and credible. Contrast the result indicates that the analytical solution and can get in the normal service condition the deflection of the con- crete beams, for the future analysis of the external prestressed carbon fiber reinforced the continuous girder provides the foundation.