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首页> 外文期刊>Advances in civil engineering >A Pilot Study on Structural Responses of Normal Concrete-UHPC Composite Bridge Decks w/wo Rebars through an Experimental-Numerical Approach
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A Pilot Study on Structural Responses of Normal Concrete-UHPC Composite Bridge Decks w/wo Rebars through an Experimental-Numerical Approach

机译：实验 - 数值方法普通混凝土综合复合桥甲板W / WO钢筋结构响应的试验研究

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摘要

Ultra-high-performance concrete (UHPC) is already gaining in-field applications in bridge deck rehabilitation. On the other aspect, an innovative NC-UHPC composite deck system was motivated to promote accelerated bridge construction (ABC) implementation of a newly built bridge, of which the precast UHPC substrate serves as the formwork for the cast-in-place NC overlay. Performance characterizations were investigated by loading five decks, of various UHPC thickness and w/wo longitudinal or transverse rebars. Their effects on the composite decks’ failure patterns and load-deflection curves were quantitatively analyzed. Besides, digital image correlation (DIC) technique was adopted to adequately capture their damage evolutions. Moreover, analytical solutions for predicting a composite deck’s flexural and shear strengths are tentatively derived. Finally, 3D finite element (FE) models are developed within ATENA framework, capable of embracing the NC-UHPC interface’s behaviors. Numerical predictions agree well with the experimental results and can benefit further researches evolving a NC-UHPC composite deck system.
机译：超高性能混凝土（UHPC）已经在桥牌康复康复中获得现场应用。另一方面，创新的NC-UHPC复合甲板系统有动力促进新建桥的加速桥梁结构（ABC）实施，其中预制UHPC基板用作铸造NC覆盖层的模板。通过装载五个甲板，各种UHPC厚度和W / WOW / W / WO纵向或横向钢筋来研究性能特征。它们对复合甲板的故障模式和负载偏转曲线的影响是定量分析的。此外，采用数字图像相关（DIC）技术充分捕获其损坏的演变。此外，暂时得出用于预测复合甲板的弯曲和剪切强度的分析解决方案。最后，3D有限元（FE）模型是在Atena Framework中开发的，能够拥抱NC-UHPC接口的行为。数值预测与实验结果吻合良好，并且可以利用进一步的研究进一步研究NC-UHPC复合甲板系统。

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