【摘要】：基于應(yīng)變能等效原則求解了考慮材料應(yīng)變硬化的等效屈服強(qiáng)度,建立了雙線性、冪強(qiáng)化和Ramberg-Osgood材料的等效彈塑性模型,定義了基于等效屈服強(qiáng)度的單元承載比,給出了動態(tài)識別高承載單元的基準(zhǔn)承載比,利用變形能守恒原則確定了高承載單元的彈性模量縮減策略,進(jìn)而建立了考慮材料應(yīng)變硬化結(jié)構(gòu)極限分析的彈性模量縮減法,解除了彈性模量調(diào)整法受理想彈塑性材料本構(gòu)關(guān)系的限制,可應(yīng)用于考慮材料應(yīng)變硬化的結(jié)構(gòu)承載力設(shè)計(jì)與安全評估中.
[Abstract]:Based on the principle of strain energy equivalence, the equivalent yield strength considering strain hardening of materials is solved. The equivalent elastic-plastic models of bilinear, power hardening and Ramberg-Osgood materials are established, and the unit bearing ratio based on equivalent yield strength is defined. In this paper, the reference load ratio of dynamic identification of high bearing element is given, and the reduction strategy of elastic modulus of high bearing element is determined by using the principle of conservation of deformation energy, and the reduction method of elastic modulus considering the limit analysis of material strain-hardening structure is established. The limitation of the elastic modulus adjustment method to accept the constitutive relation of elastic-plastic materials is lifted and can be applied to the design and safety evaluation of the structural bearing capacity considering the strain hardening of the materials.
【作者單位】： 廣西大學(xué)土木建筑工程學(xué)院;工程防災(zāi)與結(jié)構(gòu)安全教育部重點(diǎn)實(shí)驗(yàn)室;國家知識產(chǎn)權(quán)局專利局專利審查協(xié)作河南中心;
【基金】：國家自然科學(xué)基金項(xiàng)目(51469004) 廣西自然科學(xué)基金重大項(xiàng)目(2012GXNSFEA053002)
【分類號】：TB12

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