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首页> 外文会议>International Seminar on Composite Materials in Concrete Construction; Sep 5-6, 2002; Scotland, UK >BASIS OF OPTIMISING STRENGTH THEORY OF REINFORCED CONCRETE BAR ELEMENTS AND CONSTRUCTIONS
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BASIS OF OPTIMISING STRENGTH THEORY OF REINFORCED CONCRETE BAR ELEMENTS AND CONSTRUCTIONS

机译：钢筋混凝土构件和结构的优化强度理论基础

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摘要

The general Optimizing Strength Theory of Concrete Elements (OSTCE) of the normal and inclined sections (cracks) under co-action of the bending moments M, shear Q and longitudinal N forces is suggested. The OSTCE uses, generalizes and develops the known principles of the strength designs of the RC elements: design on the failure stage, entire use of reinforcement strength and connected with this the plastic failure, ultimate equilibrium method for the redundant structures. So, the OSTCE guarantees the plastic failure not only of normal sections but inclined ones under shear forces action. The OSTCE overcomes the important disadvantages of the known strength design methods, in particular, absence of system unity of all known elements strength designs and non-deriveness of the partial design cases from the general ones that testified about of principle imperfection of these designs and about corresponding non-optimality of structures projected by such designs. The great role of extreme strength criteria in the OSTCE caused its name "Optimizing". The central place of the OSTCE is occupied by the general strength design case of the inclined section under co-action M, Q, N forces from which there are derived the partial strength design cases of the inclined and normal sections under co-action of M and Q and also designs of the normal section under co-action M and N and one M or N. In the OSTCE the improved design of the normal section is worked out for two levels of accuracy and simplicity which are stipulated by the assumed stress distribution on the height of compressed concrete zone: 1) uniform; 2) curve according to the entire compression diagram of concrete. The mastering of the OSTCE signifies the acquisition of knowledge of at once all the most meeting in practice the strength designs of the RC elements.
机译：提出了在弯矩M，剪力Q和纵向N力共同作用下，正常和倾斜截面（裂缝）混凝土构件的最佳强度理论（OSTCE）。 OSTCE使用，归纳和开发了RC构件强度设计的已知原理：在破坏阶段进行设计，全部使用钢筋强度并与此相关的塑性破坏，冗余结构的最终平衡方法。因此，OSTCE不仅保证正常截面的塑性破坏，而且还保证在剪切力作用下倾斜的塑性破坏。 OSTCE克服了已知强度设计方法的重要缺点，特别是，缺少所有已知元素强度设计的系统统一性，以及从证明这些设计的原理不完善之处以及证明这些设计存在缺陷的一般性案例中，部分设计案例的不衍生性。这种设计所投影的结构的相应非最优性。极限强度标准在OSTCE中的重要作用使它的名称为“ Optimizing”。 OSTCE的中心位置由共同作用的M，Q，N力作用下的倾斜截面的总体强度设计工况占据，由此得出在M共同作用下的倾斜截面和法向截面的局部强度设计工况。和Q以及共同作用M和N以及一个M或N下的法向截面的设计。在OSTCE中，法向截面的改进设计针对两种精度和简单性进行了设计，这由假设的应力分布规定在压缩混凝土区域的高度上：1）均匀； 2）根据混凝土整体压缩曲线图。掌握OSTCE意味着立即获得了在实践中最能满足RC构件强度设计要求的知识。

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