预应力钢-混凝土连续组合梁的变形分析

对预应力钢-混凝土连续组合梁在正常使用极限状态下的变形计算进行分析。分析考虑钢与混凝土之间的滑移效应，建立简化计算模型，并在此基础上，提出混凝土支座开裂区长度以及预应力筋内力增量的计算公式，给出两跨预应力连续组合梁跨中挠度的计算图表。分析结果表明，两跨预应力连续组合梁变形计算公式计算正常使用极限状态预应力筋的内力值精度较高，不考虑预应力筋内力增量的变形计算值较试验值偏大，考虑预应力筋内力增量的变形计算值精度有明显提高，与试验结果吻合较好，可供工程设计参考。最后在两跨预应力连续组合梁变形计算公式的基础上提出预应力连续组合梁变形计算的通用方法。

Deformation analysis of prestressed steel concrete continuous composite beams

Analyze the deformation calculation of prestressed steel concrete continuous composite beams under normal service limit state. Analyze and consider the slip effect between steel and concrete, establish a simplified calculation model, and based on this, propose a calculation formula for the length of the crack zone of the concrete support and the internal force increment of the prestressed reinforcement. Provide a calculation chart for the mid span deflection of a two span prestressed continuous composite beam. The analysis results indicate that the deformation calculation formula for two span prestressed continuous composite beams has a high accuracy in calculating the internal force value of prestressed reinforcement in the normal use limit state. The deformation calculation value without considering the internal force increment of prestressed reinforcement is larger than the experimental value. The accuracy of the deformation calculation value considering the internal force increment of prestressed reinforcement has significantly improved, which is in good agreement with the experimental results and can be used as a reference for engineering design. Finally, a general method for calculating the deformation of prestressed continuous composite beams is proposed based on the formula for calculating the deformation of two span prestressed continuous composite beams