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首页> 外文期刊>Composite Structures >Compressive behavior and modelling of engineered cementitious composite (ECC) confined with LRS FRP and conventional FRP
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Compressive behavior and modelling of engineered cementitious composite (ECC) confined with LRS FRP and conventional FRP

机译：压缩行为和建模的工程化水泥复合材料（ECC）局限于LRS FRP和常规FRP

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摘要

A combination of core engineered cementitious composite (ECC) and external fiber-reinforced polymer (FRP) composites can solve the problems of insufficient ductility and durability of normal concrete (NC) in adverse environments and improve bearing capacity. However, existing studies on the performance of ECC strengthened by FRP are very limited-particularly the research on large rupture strain (LRS) FRP-confined ECC. In this study, an experimental investigation of LRS FRP and conventional glass FRP-confined ECC cylinders with different confinement levels under axial compression is presented. It is found that the application of external FRP jackets leads to a significant improvement in the compressive strength and deformation of the core ECC. LRS FRP-confined ECC exhibits a higher ultimate deformation than conventional FRP-confined ECC. The dilation behavior, axial stress-strain behavior, and energy dissipation capacity between FRP-confined ECC and FRPconfined NC under the same confinement level are compared, and the former exhibits a significantly larger ductility and energy dissipation capacity than the latter. The results also indicate that most existing models are unable to accurately predict the compressive behavior of FRP-confined ECC. To address this, a dilation model and an axial stress-strain model of FRP-confined NC are modified to extend their application to FRPconfined ECC.
机译：核心工程化水泥复合材料（ECC）和外纤维增强聚合物（FRP）复合材料的组合可以解决不利环境中正常混凝土（NC）的延展性和耐久性的问题，提高承载力。然而，对FRP加强ECC性能的现有研究非常有限 - 特别是对大型破裂菌株（LRS）FRP限制ECC的研究。在本研究中，提出了LRS FRP和常规玻璃FRP限制ECC气缸的实验研究，具有不同的轴压水平。发现外部FRP夹套的应用导致核心ECC的抗压强度和变形的显着提高。 LRS FRP-Conjined ECC表现出比传统的FRP限制ECC更高的最终变形。比较在相同限制水平下FRP限制ECC和FRPCONFIND NC之间的扩张行为，轴向应力 - 应变行为和能量耗散能力，前者表现出比后者更大的延展性和能量耗散能力。结果还表明，大多数现有模型无法准确预测FRP限制ECC的压缩行为。为了解决这个问题，修改了FRP限制NC的扩张模型和轴向应力 - 应变模型以将其应用延伸到FRPConfined ECC。

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