本文分析预应力对曲梁的影响,曲梁中的线性变换理论,并根据它们的结果对预应力砼曲线箱形梁作分析。指出预应力砼曲线梁的设计特点和构造要求,针对水平弯曲的预应力钢束所产生的侧向力及其带来的崩裂问题进行了研究。 In this paper, the influence of prestress on curved beams and the linear transformation theory in curved beams are analyzed, and the prestressed concrete box girders are analyzed according to their results. The design features and the construction requirements of prestressed concrete curved beam are pointed out. The lateral force generated by prestressed horizontal steel beam and its cracking problem are studied.