预应力混凝土超静定梁的预应力筋布置分析

THE ARRANGEMENT AND ANALYSIS OF PRESTRESSING REINFORCEMENTS FOR PRESTRESSED CONCRETE STATICALLY INDETERMINATE BEAMS

针对预应力混凝土超静定梁 ,采用结构力学方法 ,推导了在均布及集中荷载作用下 ,二跨及三跨连续梁的次弯矩表达式 ;在满足混凝土设计规范中规定的预应力混凝土构件在施工阶段预拉区抗裂要求的条件下 ,得到了预应力筋布置偏心距的表达式。可作为超静定梁进行预应力筋布置的依据。

The analysis of moments to prestressed concrete statically indeterminate beams is examined. The second moments of two-span and three-span prestressed continuous beams should be calculated under the uniform loads and concentrated loads. The locations of prestressed reinforcements arrangement should be obtained, which will satisfy the demands on cracking resisting of pretensioned area for prestressed concrete members in the condition of construction stage based on concrete structure design code, which also provides a basis for arranging the prestressing reinforcements of such sort of beams.