GFRP筋 ? 鋼筋配置對混凝土構(gòu)件力學(xué)性能研究

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中圖分類號：TU377.9 文獻標志碼：A 文章編號：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

鋼筋混凝土抗震性能一直是工程建設(shè)關(guān)注的焦點，評估混凝土抗震性能的主要指標是構(gòu)件的塑性變形性能。（剩余6022字）