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预应力钢筋混凝土构件的静力和疲劳抗剪问题是钢筋混凝土结构研究中难度较大的基本问题之一,尽管国内外已经有了较多的试验和理论研究,但就静力抗剪问题而言也还未到得解决。允许出现裂缝的部分预应力混凝土梁是指在静力使用荷载作用下允许结构出现有限宽度的裂缝,从而在疲劳荷载作用时是带裂缝工作的。国内外对部分预应力混凝土梁的疲劳性能研究较少。各国规范对于承受多次重复荷载作用的预应力混凝土梁,目前均按不允许出现裂缝的原则来设计。这样,为
The static and fatigue shear resistance of prestressed reinforced concrete members is one of the more difficult basic issues in the research of reinforced concrete structures. Although there have been more experimental and theoretical studies at home and abroad, static shear resistance has been a problem. The statement has not yet been resolved. Partially prestressed concrete beams that allow cracks are those that allow the structure to have a finite width of cracks under the action of static loads, so that when fatigue loads act, they are cracked. There are few studies on the fatigue properties of partially prestressed concrete beams at home and abroad. The specifications of various countries prestressed concrete beams subjected to multiple repeated loads are currently designed according to the principle of not permitting cracks. In this way,