Bending load capacity of reinforced concrete slabs strengthened with textile reinforced concrete
Bending load capacity of reinforced concrete slabs strengthened with textile reinforced concrete
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DOI：
10.1016/j.engstruct.2012.02.029
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发表时间：
2012-07-01
影响因子：
5.5
通讯作者：
Curbach, Manfred
中科院分区：
文献类型：
--
作者：
Schladitz, Frank;Frenzel, Michael;Curbach, Manfred
纤维布加固混凝土是一种非常有效的加固钢筋混凝土结构的方法。在德累斯顿工业大学（TU Dresden）的528合作研究中心内，对TRC进行了大量研究，以检查TRC用于随后加强现有混凝土或钢筋混凝土构件的弯曲承载能力。作为一项规则，试验研究进行了跨宽为1.60米，板厚为0.10米的钢筋混凝土小格式板与TRC加固。同时，还建立了计算模型来预测钢筋构件的最大抗弯承载力。本文介绍了对跨度为6.75 m、板厚为0.23 m的大型钢筋混凝土板的试验和理论研究，重新评估了迄今为止所获得的结果的可适用性。通过使用基于所谓的重丝束纱线的纺织高性能碳增强材料，可以实现非常高的增强水平。结果表明，显着的承载能力增加相比，未加固的参考板。因此，由TRC组成的抗弯钢筋的安全使用可以被证明用于甚至具有大跨度宽度和高配筋度的构件。同时，在相当的荷载水平下，随着配筋程度的增加，挠度明显减小。所提出的简化计算模型的计算结果与试验确定的承载能力是一致的。采用有限元法不仅可以准确地计算承载力，而且可以准确地计算变形。(C)2012爱思唯尔有限公司保留所有权利。
The use of textile reinforced concrete (TRC) is a very effective method for strengthening reinforced concrete (RC) constructions. Within the Collaborative Research Centre 528 of the Technische Universitat Dresden (TU Dresden) vast research on TRC was carried out, so as to examine the use of TRC for subsequently strengthening the bending load capacity of existing concrete or reinforced concrete components. As a rule, the experimental research was done at small format reinforced concrete slabs with span widths of 1.60 m and slab thicknesses of 0.10 m strengthened with TRC. At the same time calculation models were developed to predict the maximum bending load capacity of the reinforced components amongst others.This article describes the experimental and theoretical research reassessing the assignability of the results gained until now to large scale reinforced concrete slabs with a span width of 6.75 m and slab thickness of 0.23 m. By using textile high-performance carbon reinforcements based on so-called heavy-tow-yarns very high strengthening levels can be realized. The results show significant load bearing capacity increases compared to unreinforced reference slabs. Thus the safe use of bending reinforcements consisting of TRC could be demonstrated for components with even large span widths and high reinforcement degrees. Simultaneously a distinct decrease of deflection with growing reinforcement degree was verified at a comparable load level. Calculation results of the presented simplified calculation model for the estimated bending measurement are consistent with the load carrying capacities determined experimentally. Using the finite element method (FEM) not only the load bearing capacities but also the deformations were calculable keenly. (C) 2012 Elsevier Ltd. All rights reserved.