雙Ⅰ型GFRP-混凝土組合梁的動力學行為分析
發(fā)布時間:2018-11-18 17:31
【摘要】:為了精確計算雙Ⅰ型GFRP-混凝土組合梁的動力特性,首先推導出與其動力特性相關的抗彎剛度、剪切剛度、質量慣性矩、扭轉剛度和截面翹曲剛度的等效計算公式;根據達朗貝爾原理,分別按照Euler梁理論、Timoshenko梁理論和薄壁桿件約束扭轉理論推導出雙Ⅰ型GFRP-混凝土組合梁的彎曲振動頻率和扭轉振動頻率計算公式。選擇雙Ⅰ型GFRP 混凝土組合模型試驗梁,運用等效計算公式所得該類型梁的截面特性值與CUFSM軟件計算值吻合良好,驗證了等效計算公式的可靠性;采用ANSYS12.0軟件建立了試驗梁的有限元實體模型,并對ANSYS計算的有限元值、模型試驗值及推導公式計算結果進行了對比分析。結果表明,Timoshenko梁理論計算的彎曲自由振動頻率與實測值及有限元值吻合良好,扭轉頻率計算公式所得頻率值與實測值吻合良好,所得結論可為GFRP-混凝土組合梁的動力特性計算提供參考。
[Abstract]:In order to accurately calculate the dynamic characteristics of double-type GFRP- concrete composite beams, the equivalent formulas of bending stiffness, shear stiffness, mass moment of inertia, torsional stiffness and cross-section warping stiffness are derived. According to Darembert's principle, according to Euler beam theory, Timoshenko beam theory and thin-walled member restrained torsion theory, the formulas of bending vibration frequency and torsional vibration frequency of double 鈪,
本文編號:2340668
[Abstract]:In order to accurately calculate the dynamic characteristics of double-type GFRP- concrete composite beams, the equivalent formulas of bending stiffness, shear stiffness, mass moment of inertia, torsional stiffness and cross-section warping stiffness are derived. According to Darembert's principle, according to Euler beam theory, Timoshenko beam theory and thin-walled member restrained torsion theory, the formulas of bending vibration frequency and torsional vibration frequency of double 鈪,
本文編號:2340668
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