混合预应力体系梁是近年来国外对预应力混凝土梁使用多年后,新发展起来的一种新型预应力混凝土结构。它的原理简单,然而对于实用确须对一系列问题要加以研究和试验。对于特殊地区有特殊要求的桥梁及其他结构,如要求跨越能力大,承载能力高而断面又受到建筑高度限制的结构。对于已建成结构要求进行一些特殊的加固,均可采用混合预应力体系。国外对这种体系从五 Mixed prestressed beam system is a new type of prestressed concrete structure newly developed after many years of use of prestressed concrete beams abroad in recent years. Its rationale is simple, yet it is imperative to study and test a range of issues for practical purposes. For special areas of special requirements of the bridge and other structures, such as the requirements of large cross-over capacity, high carrying capacity and the height of the cross-section structure is subject to restrictions. For some special reinforcement of structural requirements have been completed, can be mixed prestressed system. Foreign on this system from five