- 摘 要
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（1 清華大學(xué)土木工程系， 北京 100084；2 清華大學(xué)土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室， 北京 100084）
［摘要］簡要回顧并論述鋼材、無約束混凝土和受約束混凝土的本構(gòu)骨架曲線特征參數(shù)與理論公式，主要介紹箍筋和鋼管對混凝土約束效應(yīng)的計(jì)算方法，并給出關(guān)于箍筋配筋率以及極限與峰值應(yīng)變關(guān)系的處理依據(jù)的說明，進(jìn)而開發(fā)并實(shí)現(xiàn)了纖維數(shù)據(jù)的可視化生成程序UMAT，可生成鋼筋混凝土、型鋼混凝土以及鋼管混凝土等常用截面形式的纖維數(shù)據(jù)。最后，利用UMAT給出了兩個(gè)典型構(gòu)件截面纖維數(shù)據(jù)的操作流程。結(jié)果表明UMAT程序可為采用MSC.MARC軟件進(jìn)行結(jié)構(gòu)的動(dòng)力彈塑性和倒塌分析提供便利。
［關(guān)鍵詞］UMAT; 鋼管混凝土; 型鋼混凝土; 動(dòng)力彈塑性; 倒塌; MSC.MARC
中圖分類號：TU973.2,TP319 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2014)04-0088-06
Dynamic elastic-plasticity and collapse analysis for large-span and high-rise structure (Ⅱ):
theory and development of fiber-data program UMAT
Liu Guohuan1, 2, Lu Xinzheng1, 2
(1 Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China）
Abstract: The constitutive skeleton curve characteristic parameters and theoretical formula models of steel, unconfined concrete and confined concrete were firstly reviewed and discussed in brief. Then, for the confined concrete, the calculating methods of the confinement effects of the stirrups and steel pipe on concrete were introduced and the processing instructions of the stirrup reinforcement ratio and the relationship between limitation and peak strain were given to give a birth to a visual program UMAT for material fiber-data. By using the UMAT, the fiber data output of several types of material sections such as the reinforced concrete, steel reinforced concrete，steel pipe concrete and so on can be operated. At last, the flow diagram of the fiber data of two type of typical frame section were further given. The results show that the program UMAT can provide convenience for structural dynamic elastic-plastic and collapse calculations when using MSC.MARC software.
Keywords: UMAT; steel pipe concrete; steel reinforced concrete; dynamic elastic-plastic; collapse; MSC.MARC
*中國博士后科學(xué)基金（2011M500332）。
作者簡介：柳國環(huán)，博士，現(xiàn)為天津大學(xué)副教授，Email：carecivil@sina.com。
參考文獻(xiàn)
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