- 摘 要
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（上海交通大學(xué)船舶海洋與建筑工程學(xué)院，上海 200240）
［摘要］采用有限元軟件ANSYS/LS-DYNA研究了開洞空間內(nèi)炸藥爆炸沖擊波傳播特性和荷載的簡化方法，提出了適用于室內(nèi)爆炸情況下簡化的荷載模型，并將該荷載模型施加于兩端鉸接的鋼柱上，利用ABAQUS有限元軟件對不同工況下鋼柱的動力響應(yīng)進行了參數(shù)分析。結(jié)果表明，降低軸壓比和長細比可有效提高鋼柱在爆炸荷載作用下的承載能力和穩(wěn)定性；軸壓比較小時，隨著軸壓比的增加，柱中最大位移有少量增幅，只有當(dāng)軸壓比達到一個限值才會對柱中位移產(chǎn)生顯著影響,隨著長細比的增大，該值有所降低;增加鋼柱截面高度比增加截面寬度更能有效地提高柱的抗爆能力。
［關(guān)鍵詞］內(nèi)爆炸； 荷載簡化； 動力響應(yīng)； 參數(shù)分析
中圖分類號：TU391， TU751-9文獻標(biāo)識碼：A文章編號：1002-848X(2018)02-0072-06
Parameter analysis of the dynamic responses of steel column under internal blast loading
Liu Sai, Zhao Jincheng
(School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
Abstract:The research about shock wave propagation law and the simplification under an interior explosion within a room with an opening was presented based on the finite element software ANSYS/LS-DYNA. A simplified model suitable for internal explosion was proposed，which was applied to a steel column to analyse the parameter of the dynamic responses under different conditions by using ABAQUS finite element software. The results show that smaller axial compression ratio and slenderness can effectively improve the bearing capacity and stability of the steel column subjected to the blast loading. When the axial compression ratio is relatively small, the biggest displacement of the middle position of the column will increase slightly as the axial compression ratio increases. Only if the axial compression ratio reached a limit value, it can have a significant impact on the displacement of the middle position. As the slenderness grows, this limit value decreases. Increasing the height of cross section of the steel column can enhance the anti-blast ability more effectively than increasing the width of the cross section.
Keywords:internal blast; loading simplification; dynamic response; parameter analysis
作者簡介：劉賽，碩士，Email:liusai99@126.com。
