INTERACTION BETWEEN PRESTRESS SECONDARY MOMENTS, MOMENT REDISTRIBUTION, AND DUCTILITY: A TREATISE ON THE AUSTRALIAN CONCRETE CODES
INTERACTION BETWEEN PRESTRESS SECONDARY MOMENTS, MOMENT REDISTRIBUTION, AND DUCTILITY: A TREATISE ON THE AUSTRALIAN CONCRETE CODES
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预应力二次力矩、力矩重新分配和延展性之间的相互作用：澳大利亚混凝土规范论文
DOI：
10.14359/1297
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发表时间：
1992
影响因子：
1.8
通讯作者：
G. C. Reynolds
中科院分区：
文献类型：
--
作者：
P. Wyche;J. Uren;G. C. Reynolds
澳大利亚混凝土规范NAASRA和AS3600允许预应力混凝土结构在强度极限状态下进行矩重分配设计。如果考虑的截面具有足够的延性，则任何中间支撑处的重新分配弯矩作为弹性确定和因子负弯矩的百分比，包括二次预应力效应。这些允许再调整的幅度与这些截面的延性直接相关。这些再分布的大小与相关截面的最终容量和延性之间存在逻辑关系。相反，ACI 318-89中的规则被证明是不合逻辑的。包含预应力次弯矩与其他荷载弯矩一直是一个相当有争议的主题，本文从设计师的角度说明，这些次弯矩可以被认为存在于强度极限状态，并且它们通常是有益的。
The Australian concrete codes, NAASRA and AS3600, permit moment redistribution in prestressed concrete structures for design at the strength ultimate limit state. Provided the sections considered have sufficient ductility, the redistributed moment at any intermediate support is taken as a percentage of the elastically determined and factored negatives moment, including the secondary prestress effects. The magnitudes of these allowable redistrubtions are directly related to the ductility of these sections. There is a logical relationship between the magnitude of these redistributions and the ultimate capacity and ductility of the relavant cross sections. Conversely, the rules in ACI 318-89 are shown to be illogical. The inclusion of prestress secondary moments with other load moments has been a subject of considerable controversy, and this paper illustrates, from a designer's point of view, that these secondary moments can be considered to be present at the strength ultimate limit state and that they are often beneficial.