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Dynamic performance of cable-stayed bridge tower with multi-stage pendulum mass damper under wind excitations——I:Theory 被引量:4
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作者 郭安薪 徐幼麟 李惠 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2007年第3期295-306,共12页
In this paper, wind-induced vibration control of a single column tower of a cable-stayed bridge with a multi- stage pendulum mass damper (MSPMD) is investigated. Special attention is given to overcoming space limita... In this paper, wind-induced vibration control of a single column tower of a cable-stayed bridge with a multi- stage pendulum mass damper (MSPMD) is investigated. Special attention is given to overcoming space limitations for installing the control device in the tower and the effect of varying natural frequency of the towers during construction. First, the finite element model of the bridge during its construction and the basic equation of motion of the MSPMD are introduced. The equation of motion of the bridge with the MSPMD under along-wind excitation is then established. Finally, a numerical simulation and parametric study are conducted to assess the effectiveness of the control system for reducing the wind-induced vibration of the bridge towers during construction. The numerical simulation results show that the MSPMD is practical and effective for reducing the along-wind response of the single column tower, can be installed in a small area of the tower, and complies with the time-variant characteristics of the bridge during its entire construction stage. 展开更多
关键词 multi-stage pendulum mass damper cable-stayed bridge single column tower wind-induced vibration
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Dynamic performance of cable-stayed bridge tower with multi-stage pendulum mass damper under wind excitations—Ⅱ: Experiment 被引量:2
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作者 郭安薪 徐幼麟 李惠 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2007年第4期417-424,共8页
The possibility of using a multi-stage pendulum mass damper (MSPMD) to control wind-induced vibration of a single column tower of a cable-stayed bridge during construction was studied theoretically in part I of this... The possibility of using a multi-stage pendulum mass damper (MSPMD) to control wind-induced vibration of a single column tower of a cable-stayed bridge during construction was studied theoretically in part I of this work. In this paper, the performance of the MSPMD for reducing bridge tower vibration is studied experimentally. A MSPMD model and a tower model of the bridge with geometry scaling of 1:100 were designed and manufactured. Calibration of the MSPMD model with different wire lengths is conducted to verify the analytical model of the damper. A series of tests for the uncontrolled freestanding tower, tower with cables, and tower with MSPMD model are then performed under harmonic and white noise excitations. The experimental results show that the responses of the tower model significantly decrease with the installation of the MSPMD model, which demonstrates the effectiveness of the M SPMD to mitigate the vibration of the bridge tower. 展开更多
关键词 experimental study cable-stayed bridge single column tower multi-stage pendulum mass damper vibration control
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人行天桥钢斜塔整体竖转提升施工技术 被引量:3
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作者 赵宪敏 《石家庄铁道学院学报》 2007年第4期127-130,共4页
天津泰达人行天桥是一座单斜塔密索钢结构斜拉桥,由于施工过程中泰达大街不能断交,所以钢斜塔的安装就成为本工程的重难点,经过比选分析,采用整体竖转提升法施工,实现了施工不中断交通的目标,避免了高空作业安装,保证了安装精度和安装... 天津泰达人行天桥是一座单斜塔密索钢结构斜拉桥,由于施工过程中泰达大街不能断交,所以钢斜塔的安装就成为本工程的重难点,经过比选分析,采用整体竖转提升法施工,实现了施工不中断交通的目标,避免了高空作业安装,保证了安装精度和安装质量。详细介绍了钢斜塔的构造、提升设计、主要施工过程和施工方法,对今后同类工程施工有一定的借鉴意义。 展开更多
关键词 人行天桥 单斜塔斜拉桥 钢斜塔安装 竖转提升施工
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和美桥独斜塔单索面曲线悬索步道桥体系转换 被引量:1
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作者 屈红伟 《福建建设科技》 2022年第6期108-112,共5页
以福建省厦门市山海健康步道主跨216.7m的曲线异形钢箱梁悬索人行步道桥为对象,为了使桥梁成桥状态内力和线形满足设计要求,建立了该桥施工全过程三维精细化有限元模型模拟现场施工,将缆索、吊索划分为10个阶段逐步张拉,辅以现场测试,... 以福建省厦门市山海健康步道主跨216.7m的曲线异形钢箱梁悬索人行步道桥为对象,为了使桥梁成桥状态内力和线形满足设计要求,建立了该桥施工全过程三维精细化有限元模型模拟现场施工,将缆索、吊索划分为10个阶段逐步张拉,辅以现场测试,每个阶段进行理论与实测数据的对比,分析产生误差的原因,不断修正索力与线形,理论分析指导现场施工,最终顺利完成了体系转换,将主梁的自重由支架移植到了缆索体系中;成桥试验监测结果显示,该桥的线形与索力与设计期望值高度吻合,本文研究方法与所得结论可为同类桥梁的设计与施工提供借鉴。 展开更多
关键词 独斜塔单索面悬索桥 步道桥 体系转换 高钒密闭索
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斜塔单索面曲线异形钢箱梁步道桥风振抑制 被引量:2
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作者 于洪波 《福建建设科技》 2021年第6期113-116,共4页
为了解决台风频发沿海城市建造大跨度柔性步行桥的风致共振稳定问题,以厦门山海健康步道最大跨度斜塔单索面曲线异形钢箱梁步道索桥(仙岳桥)为对象,建立了三维有限元模型进行理论分析,并制作了节段模型箱梁进行风洞试验,探索其成桥状态... 为了解决台风频发沿海城市建造大跨度柔性步行桥的风致共振稳定问题,以厦门山海健康步道最大跨度斜塔单索面曲线异形钢箱梁步道索桥(仙岳桥)为对象,建立了三维有限元模型进行理论分析,并制作了节段模型箱梁进行风洞试验,探索其成桥状态风致共振响应机理及抑制共振的构造措施。提出了设置60cm和80cm两种导流板抑振方案,模型试验结果表明60cm导流板的抑振措施优于80cm方案,在当地台风季检验风速范围内未见驰振显现,该构造措施同时满足涡振、颤振规范要求。 展开更多
关键词 斜塔单索面曲线步道索桥 风致振动 三维有限元 节段模型风洞试验 导流板尺寸
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