軸心受壓方鋼管混凝土短柱的性能研究：*Ⅱ分析
余勇 呂西林 Tanaka Kiyoshi Sasaki Satoshi
- 摘 要
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余勇 呂西林 （同濟(jì)大學(xué)工程結(jié)構(gòu)研究所 上海 200092）Tanaka Kiyoshi Sasaki Satoshi （日本藤田公司技術(shù)研究所）[提要] 利用三維非線性有限元方法編制的計算機(jī)程序，對試驗結(jié)果進(jìn)行了分析、比較，并探討了方鋼管混凝土截面受力機(jī)理和破壞機(jī)制。對截面尺寸和材料強(qiáng)度在較大范圍內(nèi)變化的方鋼管混凝土短柱進(jìn)行了模擬試驗，通過參數(shù)分析、回歸得到方鋼管混凝土短柱的承載力計算公式。
[關(guān)鍵詞] 方鋼管混凝土 三維非線性分析 承載力公式
The companion paper has presented the experimental results of concrete-filled rectangular tubular(CFRT) short columns under concentric loading and investigated the main factors which affected the behavior of CFRT columns. This paper presents the development of a 3D nonlinear F.E. analysis computer program whose accuracy is verified by comparing the analysis results to data from tests of Tonui and the authors, and the load-carrying and failure mechanism of CFST cross section are investigated. A capacity formulation of CFRT short columns having a wide range of cross-section dimensions and material strengths is proposed based on experiment simulation, parameter analysis and regression analysis.
Keywords: concrete-filled rectangular steel tube; 3D nonlinear analysis; capacity formulation
