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(1華中科技大學(xué)土木工程與力學(xué)學(xué)院，武漢430074；2 機(jī)械工業(yè)部第三設(shè)計研究院，武漢430039）
[摘要] 數(shù)值分析與建模是進(jìn)行鋼筋混凝土結(jié)構(gòu)抗震性能研究的重要手段。為了保證鋼筋混凝土結(jié)構(gòu)數(shù)值建模的可靠性，本文以鋼筋混凝土柱的擬靜力試驗為基礎(chǔ)，在ABAQUS中對其進(jìn)行基于纖維桿件單元非線性有限元模擬?？紤]材料本構(gòu)模型對結(jié)構(gòu)數(shù)值模擬結(jié)果的影響，對兩個擬靜力試驗柱分別建立了6個數(shù)值分析模型，計算結(jié)果表明：在選用合理混凝土與鋼筋本構(gòu)模型的條件下，纖維單元模型能夠有效的模擬鋼筋混凝土的滯回性能；在數(shù)值建模過程中可以忽略混凝土的抗拉強(qiáng)度；Kent-Scott-Park約束本構(gòu)模型與Mander約束本構(gòu)模型均能有效的模擬箍筋對混凝土的約束效應(yīng)；相比于混凝土的本構(gòu)模型，鋼筋本構(gòu)模型對模擬結(jié)果的影響更大，有必要對現(xiàn)有鋼筋的本構(gòu)模型進(jìn)行更為細(xì)致全面的研究。
[關(guān)鍵字] 纖維模型;混凝土本構(gòu);約束混凝土;鋼筋本構(gòu);ABAQUS;非線性滯回模擬
中圖分類號：TU375.3 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X（2013）S1-1455-05
作者簡介：盧怡思，碩士研究生，Email：luyisi_2007hust@sina.com。
Numerical Modeling Analysis for Pseudo-Static Experimental Columns
Lu Yisi1, Zhang Yaoting1, Xu Maohua2
(1 Huazhong University of Science and Technology,
Abstract：Numerical analysis and modeling are important means for the researches on the seismic performance of reinforced concrete structures. In order to guarantee the reliability of the numerical modeling of RC structures, studies were carried on experimental RC columns, nonlinear finite element simulations which based on fiber element were conducted in ABAQUS. Considering the influence of material constitutive model for structure numerical simulation results, 6 numerical analysis models were established respectively on two pseudo-static experimental RC columns, the results show that: In the condition of choosing reasonable constitutive models for steel and concrete, the hysteretic performance of RC columns can be simulated successfully in fiber element; Secondly, the tensile strength of concrete can be ignored in the process of numerical modeling; Thirdly, the confined concrete function by stirrup can be simulated effectively by Kent-Scott-Park model and Mander model; Finally, compared to the constitutive model of concrete, the constitutive model of reinforcement has more influences on the simulation results, it is necessary to proceed more meticulous and comprehensive studies on the existing constitutive model of reinforced.
Key word：Fiber Model; Constitutive Modeling of Concrete; Confined Concrete; Constitutive Modeling of Steel; Nonlinear Simulation of Hysteretic Behavior
