Shear assessment of reinforced concrete bridges with short anchorage lengths
Shear assessment of reinforced concrete bridges with short anchorage lengths
复制标题
短锚固长度钢筋混凝土桥梁的剪力评估
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
S. Denton
中科院分区：
文献类型：
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作者：
J. Shave;T. Ibell;S. Denton
BD 44/95中给出的抗剪承载力评估方法对于锚固长度较短的钢筋混凝土桥梁而言过于保守。基于实验室测试和理论分析的方案，开发了一种新的评估此类桥梁的方法。在实验室中测试了70个样本，以代表混凝土板和梁。以下参数是不同的：量的垂直剪切钢筋，剪切跨度，钢筋类型，横向和顶部钢筋，混凝土强度，和离散或连续轴承。利用塑性理论建立了上限和下限塑性模型。新模型预测的结果与实验室测试中观察到的行为一致，并被用作简化评估模型的基础。提出的评估方法进行了验证，使用实验测试数据和以前发表的结果。
The method for the assessment of shear capacity given in BD44/95 is shown to be unduly conservative for reinforced concrete bridges with short anchorage lengths. A new method was developed for the assessment of such bridges, based on a programme of laboratory testing and theoretical analyses. Seventy specimens were tested in the laboratory, to represent concrete slabs and beams. The following parameters were varied: amount of vertical shear reinforcement, shear span, type of reinforcing bar, transverse and top reinforcement, concrete strength, and discrete or continuous bearings. Upper-bound and lower-bound plasticity models were developed using plasticity theory. The new models predict results that were consistent with the behaviour observed in the laboratory tests and were used as the basis of a simplified assessment model. The proposed assessment method was verified using the experimental test data and previously published results.