随着大跨度预应力混凝土连续刚构桥梁在中国迅速发展与使用,很多实际工程表明,这种大跨度的预应力混凝土桥在使用若干年后就会出现混凝土开裂和跨中下挠过大的病害,并且随着时间不断发展,越来越严重。本文通过荷载平衡理论,重新布置一座连续刚构桥的预应力筋束,比较原先设计的钢筋布置与通过荷载平衡法重新配束后钢筋布置的成桥位移以及长期位移,由此验证荷载平衡法在连续刚构桥主动控制下挠中的可行性。 With the rapid development and application of long-span prestressed concrete continuous rigid-frame bridges in China, many practical projects show that the long-span prestressed concrete bridges may appear to crack and cross over-center after several years of use Diseases, and growing more and more serious over time. In this paper, the prestressing tendons of a continuous rigid frame bridge are rearranged according to the theory of load balance, and the displacement and long-term displacements of the originally designed steel bars are compared with those of the steel bars rearranged by the load balance method. Feasibility of Flexibility in Continuous Rigid Frame Bridge Under Active Control.