钢筋混凝土板的拉伸硬化过程分析-----外文翻译.doc

Abstract: The tensile capacity of concrete is usually neglected when calculating the strength of a reinforced concrete beam or slab, even though concrete continues to carry tensile stress between the cracks due to the transfer of forces from the tensile reinforcement to the concrete through bond. This contribution of the tensile concrete is known as tension stiffening and it affects the member’s stiffness after cracking and hence the deflection of the member and the width of the cracks under service loads. For lightly reinforced members, such as floor slabs, the flexural stiffness of a fully cracked section is many times smaller than that of an uncracked section, and tension stiffening contributes greatly to the postcracking stiffness. In this paper, the approaches to account for tension stiffening in the ACI, European, and British codes are eva luated critically and predictions are compared with experimental observations. Finally, recommendations are included for modeling tension stiffening in the design of reinforced concrete floor slabs for deflection control.
DOI: 10.1061/（ASCE）0733-9445（2007）133:6（899）
摘要：当计算一个钢筋混凝土梁或板的承载力时混凝土的抗拉能力通常被忽视,尽管具体的拉应力继续进行，由于拉钢筋到混凝土之间裂缝的转换力量。这一种混凝土的拉力被称为混凝土的张力硬化。在开裂后它会影响钢筋混凝土的刚度，因此它的挠度和裂缝宽度必须根据屈服强度负载。对轻混凝土，例如楼板，全部裂缝的弯曲刚度比没有裂缝部分的要小很多，张力加劲有助于刚度。在本文中，ACI方法必须考虑到紧张加劲，欧洲和英国的方法是严格评估和预测与实验结果进行比较。最后，建议书包括建模系统紧张挠度控制的钢筋混凝土楼板设计变硬。
分类号： 1061/ASCE0733-94452007133:6899
关键词：开裂;蠕变挠度，混凝土，钢筋，适用性，收缩，混凝土砖。