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Experimental and Numerical Analysis of High-Strength Concrete Beams Including Steel Fibers and Large-Particle Recycled Coarse Aggregates

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Fluid Dynamics & Materials Processing 2021年第5期17卷 947-958页

作者： Chunyang Liu Yangyang Wu Yingqi Gao Zhenyun Tang Department of Civil Engineering Shandong Jianzhu UniversityJinan250101China Key Laboratory of Building Structural Retrofitting and Underground Space Engineering Shandong Jianzhu UniversityMinistry of EducationJinan250101China Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit Beijing University of TechnologyBeijing100124China

In order to study the performances of high-strength concrete beams including steel fibers and large-particle recycled aggregates,four different beams have been designed,tested experimentally and simulated numerically.As varying parameters,the replacement rates of recycled coarse aggregates and CFRP(carbon fiber reinforced polymer)sheets have been considered.The failure mode of these beams,related load deflection curves,stirrup strain and shear capacity have been determined through monotonic loading tests.The simulations have been conducted using the ABAQUS finite element software.The results show that the shear failure mode of recycled concrete beams is similar to that of ordinary concrete beams.The shear carrying capacity of high-strength concrete beams including steel fibers and large-particle recycled coarse aggregates grows with an increase in the replacement rate of recycled coarse aggregates.Reinforcement with CFRP sheets can significantly improve the beam’s shear carrying capacity and overall resistance to deformation.

关键词： High-strength recycled concrete beam steel fiber large-particle recycled aggregates pre-damage reinforcement numerical simulation carrying capacity calculation

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Experimental Study on the Axial Compression Behavior of Short Columns of Steel-Fiber-Reinforced Recycled Aggregate Concrete

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Fluid Dynamics & Materials Processing 2021年第6期17卷 1129-1142页

作者： Chunyang Liu Jia Xu Yifan Gu Ruofan Shi Department of Civil Engineering Shandong Jianzhu UniversityJinanChina Key Laboratory of Building Structural Retrofitting and Underground Space Engineering Shandong Jianzhu UniversityJinanChina

In order to study the axial compression performances of short columns made of recycled aggregate concrete,four samples were designed with different recycled aggregate replacement rates and carbon fibre reinforced plastics(CFRP)sheets.Then,monotonic loading was implemented to assess the variation trends of their axial compression properties.The ABAQUS finite element software was also used to determined the compression performances.Good agreement between experimental and numerical results has been found for the different parameters being considered.As shown by the results,recycled coarse aggregates result in improved ductility and better deformation performance of the specimens.The failure of specimens caused by pre damage can be compensated by using CFRP sheets,by which both the resistance to deformation and the axial carrying capacity of columns can be increased.

关键词： Recycled aggregate concrete short column axial pressure performance ABAQUS finite element analysis carrying capacity calculation

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