| 大跨径钢桥面铺装层车辆动响应影响因素分析 |
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| 引用本文： | 徐勋倩.大跨径钢桥面铺装层车辆动响应影响因素分析[J].公路交通科技,2009,26(9). |
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| 作者姓名： | 徐勋倩 |
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| 作者单位： | 南通大学,建筑工程学院,江苏,南通,226019 |
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| 基金项目： | 江苏省高校自然科学基金资助项目，南通大学自然科学基会资助项目 |
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| 摘 要： | 从耦合振动的角度出发,研究大跨径钢桥面铺装层在车辆随机动荷载作用下的响应机制.将汽车等效为2自由度5参数模型,考虑桥梁表面不平顺产生的随机激励,建立车-钢桥面铺装耦合振动分析模型.利用模态分析与时变系数常微分方程求解方法,分析钢桥面铺装在车辆随机动荷载作用下的动力响应分布规律.定义由铺装层竖向位移、拉应力和拉应变表示的动力放大系数,研究车速、桥面不平度、铺装层开裂损伤和粘结层滑移等对动力放大系数的影响.结果表明,路面不平度、粘结层滑移是影响动力放大系数的主要因素,在进行大跨径钢桥面铺装结构设计时可考虑动力放大系数为1.5.
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| 关 键 词： | 桥梁工程 车辆动荷载响应 耦合振动 钢桥面铺装 路面不平度 粘结层滑移 |
Analysis of Dynamic Response of Long-span Steel Deck Pavement under Moving Loads |
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| XU Xunqian.Analysis of Dynamic Response of Long-span Steel Deck Pavement under Moving Loads[J].Journal of Highway and Transportation Research and Development,2009,26(9). |
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| Authors: | XU Xunqian |
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| Institution: | School of Architecture;Nantong University;Nantong Jiangsu 226019;China |
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| Abstract: | Based on the coupled vibration theory,dynamic behavior of long-span steel bridge deck pavement under random moving vehicles was studied.The vehicle was modeled as a two-DOF system with five parameters,and a three-dimensional vehicle-bridge coupling vibration model was established with consideration of the vertical random excitation caused by deck surface roughness.Based on modal analysis and the differential equation with time-varying coefficients,the dynamic response distribution generated by vehicle-deck ... |
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| Keywords: | bridge engineering dynamic response due to moving vehicle coupling vibration deck pavement surface roughness bonding layer slippage |
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