拉压杆模型方法在预应力混凝土锚固区配筋中的应用

拉压杆模型方法(STM)可用于钢筋混凝土和预应力混凝土结构设计,并且已经被 FIP、AASHTO 等规范所采纳。但是在国家现行混凝土结构设计规范(GB 50010-2002)中,并未见到将这种方法应用于预应力混凝土结构设计。在 GB 50010-2002中,关于后张预应力混凝土构件端部锚固区配筋仅是从构造上做出了规定,并不是一种理想的设计方法。在介绍拉压杆模型理论的基础上,给出了能够用于后张预应力混凝土构件端部锚固区配筋设计的拉压杆模型,提出了相应的配筋设计方法,对规范提出合理的修改建议。

STRUT-AND-TIE MODEL APPLIED TO DESIGN OF POST-TENSIONED END ANCHORAGE ZONE

Strut-and-tie model(STM)has been used as one of methods for the design of both reinforced and prestressed con- crete structures,and employed by some codes such as FIP and AASHTO.In the design of prestressed concrete struc- tures,however,applications of this method have not been found in the current China National Code(GB50010- 2002).In GB50010-2002 only some structural requirements are defined for the design of reinforcing bars in the an- chorage zone in post-tensioned concrete structures.The purpose of thi...