GFRP筋 † 钢筋配置对混凝土构件力学性能研究

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中图分类号：TU377.9 文献标志码：A 文章编号：1005-8249（2025）02-0091-06

DO1：10.19860/j.cnki.issn1005-8249.2025.02.016

Abstract：Throughpushovertests，thisstudyinvestigatesthecrackpropagationpaterns，plastichingedistribution characteristics，and energy dissipation mechanisms ofconcrete members with hybridGFRPbar-steel bar stepped configurations underload，aiming toexplore theseismic performanceofGFRP-reinforcedconcretecompositestructures.Theresultsshowthat thehigh strengthandlowelastic moduluscharacteristicsof GFRPbarscombinedwiththeductiltyadvantagesofstelbarscan promote theformationof multiplecontrolableplasticzones inthe members，andthe hierarchical evolutionof multiple plastic zoneseffectivelydelaysthedegradationof structural stiffess，themulti-levelyieldmechanismof themembersisstableunder strongearthquake.Theformationof multipleplastic zones inconcretememberscanbeefectivelyregulatedbythestrategyof Cascade cooperativereinforcementofGFRPbarsand steelbars，andthe lengthandreinforcementparametersof thecascadecan be reasonably controlled，it can increase the seismic performance of the cascade GFRP Bars + reinforced concrete members. Thisreveals theenancementpathof cascadereinforcementonthemechanical propertiesofconcretemembers，and providesan important reference value for the improvement of the seismic theory system of new composite structures.

Key words： GFRP REBAR + rebar configuration； push - over test；multi- plastic zone；generation mechanism；mechanicalproperties ； seismic performance

0 引言

钢筋混凝土抗震性能一直是工程建设关注的焦点，评估混凝土抗震性能的主要指标是构件的塑性变形性能。（剩余6022字）