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(1 東北大學(xué)資源與土木工程學(xué)院，沈陽 110004； 2 大連理工大學(xué)土木水利學(xué)院，大連 116024)

［摘要］采用RFPA3D(Realistic Failure Process Analysis)軟件對軸心受壓的矩形鋼管混凝土短柱進(jìn)行了數(shù)值模擬。分析了極限承載力與鋼管混凝土柱長度的關(guān)系以及混凝土截面面積對極限承載力的影響等問題。研究結(jié)果表明，鋼管混凝土柱的極限承載力隨著柱長度的增加而降低，隨著截面面積的增加而增加。在鋼管混凝土承載力方面，數(shù)值模擬結(jié)果與試驗(yàn)結(jié)果比較吻合。數(shù)值模擬的特色在于再現(xiàn)了核心混凝土的變形、損傷與破壞過程。數(shù)值模擬結(jié)果證明了RFPA3D軟件模擬鋼管混凝土結(jié)構(gòu)的有效性，其模擬結(jié)果可為工程設(shè)計(jì)提供參考。

［關(guān)鍵詞］鋼管混凝土柱；承載力；破壞過程；非均勻性

Numerical simulation on failure process of short concrete-filled rectangular steel tube columns under axial compressive loading

Zhu Wancheng¹, Ling Li¹, Tang Chun’an², Yu Qinglei¹, Zhang Yongbin²(1 School of Resources & Civil Engineering, Northeastern University, Shenyang 110004, China; 2 School of Civil & Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China)

Abstract:Realistic Failure Process Analysis (RFPA3D) software is used to simulate the short concrete-filled rectangular steel tube columns under axial compressive loading. The relationship between the ultimate bearing capacity and the length of the columns is presented, and the effect of cross-section area is also considered in the present simulations. The results of numerical simulation indicate that the ultimate bearing capacity is adversely affected by the length of the columns. As regards the ultimate bearing capacity, the simulation results agree well with the experiment observation. The results indicate that RFPA3D software is effectively in capturing the failure characteristics of the concrete-filled rectangular steel tube columns, denoting RFPA3D could be used as numerical tool to evaluate the design of concrete-filled rectangular steel tube columns.

Keywords:concrete-filled steel tube column; bearing capacity; failure process; heterogeneity

*國家自然科學(xué)基金項(xiàng)目(50874024，50934006和50904013)；新世紀(jì)優(yōu)秀人才支持計(jì)劃資助項(xiàng)目(NCET-06-0291)；遼寧省自然科學(xué)基金項(xiàng)目(20082027)；教育部留學(xué)回國人員科研啟動基金資助項(xiàng)目。

作者簡介：朱萬成，博士，教授，Email：zhuwancheng@mail.neu.edu.cn。

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