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首页> 外文会议>International Seminar on Composite Materials in Concrete Construction; Sep 5-6, 2002; Scotland, UK >EXPANDED WIRE FABRIC PERMANENT FORMWORK FOR IMPROVING FLEXURAL BEHAVIOUR OF REINFORCED CONCRETE BEAMS
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EXPANDED WIRE FABRIC PERMANENT FORMWORK FOR IMPROVING FLEXURAL BEHAVIOUR OF REINFORCED CONCRETE BEAMS

机译：增强钢筋混凝土梁挠曲性能的线材永久性模板

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摘要

A new technique for using expanded wire fabric (EWF) as additional reinforcement and permanent formwork for reinforced concrete beams is proposed. Five beam specimens were experimentally tested, namely, an under reinforced control beam containing only conventional reinforcement and other four beams additionally reinforced with EWF for shear and flexure. The studied parameters included the orientation of EWF, the amount of longitudinal and transverse EWF, and the method of application of EWF. The results showed that the use of EWF led to an improvement in deflection and ductility of test beams. In addition, beams reinforced with EWF showed better crack control in comparison with the control beam having only conventional reinforcement. The orientation and method of application of EWF have a great effect on flexural behaviour of beams. The beam reinforced with U shape EWF jacket and additional layer of EWF flexural reinforcement showed better properties compared with the other beams. Its load capacity was increased by 20%, strain reached the maximum of (0.014) and the crack widths were reduced by approximately 35% compared to the control beam with conventional reinforcement. A proposed formula was developed for predicting the effect of EWF on crack control. The results obtained by this formula were in good agreement with the experimental results.
机译：提出了一种新的技术，该技术使用扩展金属丝网（EWF）作为钢筋混凝土梁的附加钢筋和永久模板。对五个梁样本进行了实验测试，即，一个仅包含常规钢筋的欠加固控制梁，以及另外四个用EWF加固以进行剪切和挠曲的梁。研究的参数包括EWF的方向，纵向和横向EWF的数量以及EWF的应用方法。结果表明，使用EWF可以改善测试梁的挠度和延展性。另外，与仅具有常规增强的控制梁相比，用EWF增强的梁显示出更好的裂缝控制。 EWF的方向和应用方法对梁的弯曲行为有很大影响。与其他梁相比，用U型EWF护套和附加的EWF抗弯钢筋层加固的梁表现出更好的性能。与具有传统钢筋的控制梁相比，其承载能力提高了20％，应变达到最大值（0.014），裂缝宽度减少了约35％。开发了一个提议的公式来预测EWF对裂纹控制的影响。该公式得到的结果与实验结果吻合良好。

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