In this article, a recent version of the rotating-angle softened truss model proposed by the authors, to compute the full behavior of prestressed concrete membrane elements under in-plane stresses, is extended to prestressed steel fiber concrete membrane elements. For this, the smeared constitutive relationships for the component materials are modified to include the influence of the steel fiber reinforcement. In particular, a new smeared constitutive relationship for steel fiber concrete in tension is incorporated in the model. The extended model, called efficient rotating-angle softened truss model for prestressed steel fiber concrete, is checked against some experimental results found in the literature and related with prestressed steel fiber concrete panels tested under shear up to failure. It is showed that the proposed model is able to predict well the full behavior of prestressed steel fiber concrete membrane elements for all loading range, including the influence after cracking of the steel fiber reinforcement.

在本文中，作者提出了一种最新版本的旋转角软化桁架模型，该模型用于计算平面应力作用下的预应力混凝土膜单元的完整性能，并扩展到了预应力钢纤维混凝土膜单元。为此，对组成材料的涂抹本构关系进行了修改，以包括钢纤维增强材料的影响。特别是，在模型中纳入了钢纤维混凝土在拉力作用下的一种新的涂抹本构关系。针对文献中发现的一些试验结果，检查了扩展模型，即用于预应力钢纤维混凝土的有效旋转角软化桁架模型，该模型与在剪切直至破坏的情况下进行测试的预应力钢纤维混凝土板有关。