| 漂浮体系斜拉桥黏滞阻尼器参数的简化计算 |
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| 引用本文： | 徐艳,童川,李建中.漂浮体系斜拉桥黏滞阻尼器参数的简化计算[J].同济大学学报(自然科学版),2018,46(5):0574-0579. |
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| 作者姓名： | 徐艳 童川 李建中 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室 |
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| 基金项目： | 国家自然科学基金项目（51478338） |
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| 摘 要： | 根据漂浮体系斜拉桥的动力响应特点以及近断层速度脉冲型地震动特性,基于结构动力学基本理论,提出了考虑附加黏滞阻尼器的漂浮体系斜拉桥三质点简化动力模型.利用等效阻尼比概念以及能量消耗等效原理,推导得到了速度脉冲型地震动作用下漂浮体系斜拉桥线性及非线性黏滞阻尼器阻尼系数的简化计算公式.最后,通过一座漂浮体系斜拉桥实例,验证了相关公式的正确性.
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| 关 键 词： | 斜拉桥 黏滞阻尼器 三质点简化动力模型 速度脉冲 等效阻尼比 |
| 收稿时间： | 2017/9/4 0:00:00 |
| 修稿时间： | 2018/3/21 0:00:00 |
Simplified Calculation of Viscous Damper Parameter for Floating system Cable stayed Bridge
XU Yan, TONG Chuan, LI Jianzhong |
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| XU Yan,TONG Chuan and LI Jianzhong.Simplified Calculation of Viscous Damper Parameter for Floating system Cable stayed Bridge
XU Yan, TONG Chuan, LI Jianzhong[J].Journal of Tongji University(Natural Science),2018,46(5):0574-0579. |
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| Authors: | XU Yan TONG Chuan and LI Jianzhong |
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| Institution: | State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China,State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China and State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | In the light of velocity pulse characteristics of near fault ground motion and the dominated vibration mode to the dynamic response of floating system cable stayed bridge, a three mass simplified dynamic model was derived and the differential dynamic equation was established. Based on the method of equivalent damping ratio and equivalent linearization of nonlinear viscous dampers, design formulas for determining the damping coefficient of nonlinear viscous dampers of the bridge subjected to near fault ground motion were deduced. Finally, the accuracy of the proposed design formulas for nonlinear viscous dampers in predicting the damping ratio of the bridge was verified by a real cable stayed bridge. |
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| Keywords: | cable stayed bridge viscous damper three mass simplified dynamic model velocity pulse equivalent damping ratio |
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