一种新的钢筋混凝土软化桁架模型

本文在转动角软化桁架模型和固定角软化桁架模型的基础上提出一种新的钢筋混凝土软化桁架模型——随动角软化桁架模型；该模型认为钢筋混凝土薄膜单元中裂缝的开展方向介于固定角和转动角之间；本文通过对文献 [2]、 [3]、 [4]试验数据分析，建立了钢筋混凝土单元整体和裂缝处的平均剪应力和平均剪应变关系 (τ lt-γ lt、τ 21-γ 21)。本文提出的模型解释了前两个模型存在的问题，并通过与试验数据的比较，验证了本模型的可靠性。

A New Softened Truss Model for Reinforced Concrete

This paper proposes a new softened truss model for reinforced concrete based on the fixed angle softened truss model and the rotating angle softened truss model. The new model considered that the inclination of cracks of the membrane element of reinforced concrete was between the rotating angle and fixed angle. Average shear stress and average shear strain relationship ( τυ-y.、 τ21-γ21 ) at whole element and at cracks were built through analyzing the test data of literatures [2]～[4]. The new model can explain the problems existing in prior two models and the reliability of the new model is verified.