本文選題：鋼筋混凝土　切入點：落錘沖擊測試　出處：《高壓物理學(xué)報》2016年02期

【摘要】：基于鋼筋混凝土梁受落錘沖擊實驗結(jié)果,提出了損傷型動態(tài)本構(gòu)模型。該模型以混凝土黏彈性本構(gòu)特性為基礎(chǔ),為了考慮鋼筋的作用以及梁的損傷特性,將鋼筋增強(qiáng)因子和損傷變量引入理論模型中,最終得出了以應(yīng)變、應(yīng)變率、損傷變量和配筋率為控制變量的鋼筋混凝土本構(gòu)模型。將該動態(tài)模型運用于非彈性彎曲梁理論分析中,通過數(shù)值求解得出了梁跨中撓度時程曲線,與實驗結(jié)果相吻合。
[Abstract]:Based on the experimental results of reinforced concrete beams subjected to impact of drop hammer, a damage dynamic constitutive model is proposed.The model is based on the viscoelastic constitutive characteristics of concrete. In order to consider the effect of steel bar and the damage characteristic of beam, the reinforcement factor and damage variable are introduced into the theoretical model, and the strain rate and strain rate are obtained.The constitutive model of reinforced concrete with damage variable and reinforcement ratio as control variable.The dynamic model is applied to the theoretical analysis of inelastic bending beams, and the time-history curves of the mid-span deflection of beams are obtained by numerical solution, which is in agreement with the experimental results.
【作者單位】： 北京理工大學(xué)爆炸科學(xué)與技術(shù)國家重點實驗室;中北大學(xué)機(jī)電工程學(xué)院;太原理工大學(xué)材料強(qiáng)度和結(jié)構(gòu)沖擊山西重點實驗室;
【基金】：國家自然科學(xué)基金重大項目(11390360,11390362)
【分類號】：TU375.1;O347.3

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