双Ⅰ型GFRP-混凝土组合梁的动力学行为分析
发布时间：2018-11-18 17:31
【摘要】：为了精确计算双Ⅰ型GFRP-混凝土组合梁的动力特性,首先推导出与其动力特性相关的抗弯刚度、剪切刚度、质量惯性矩、扭转刚度和截面翘曲刚度的等效计算公式;根据达朗贝尔原理,分别按照Euler梁理论、Timoshenko梁理论和薄壁杆件约束扭转理论推导出双Ⅰ型GFRP-混凝土组合梁的弯曲振动频率和扭转振动频率计算公式。选择双Ⅰ型GFRP 混凝土组合模型试验梁,运用等效计算公式所得该类型梁的截面特性值与CUFSM软件计算值吻合良好,验证了等效计算公式的可靠性;采用ANSYS12.0软件建立了试验梁的有限元实体模型,并对ANSYS计算的有限元值、模型试验值及推导公式计算结果进行了对比分析。结果表明,Timoshenko梁理论计算的弯曲自由振动频率与实测值及有限元值吻合良好,扭转频率计算公式所得频率值与实测值吻合良好,所得结论可为GFRP-混凝土组合梁的动力特性计算提供参考。
[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，
本文编号：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，
本文编号：2340668
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