大跨度斜拉桥拉索减振阻尼器的试验研究  

Experimental study on cable dampers of long span bridges

作　　者：梁栋[1] 孙利民[2] 黄洪葳[2] 杜世界 山崎伸介 

机构地区：[1]河北工业大学,天津300130 [2]同济大学,上海200092 [3]上海同豪土木工程咨询有限公司,上海200092 [4]新日本制铁株式会社

出　　处：《土木工程学报》2009年第8期91-97,共7页China Civil Engineering Journal

基　　金：国家自然科学基金项目资助(50808063);国家高新技术研究发展专项(863)经费资助(2006AA11Z120);交通部西部交通科技项目(200431882223)

摘　　要：在目前的技术水平条件下,试验是验证油阻尼器抑制斜拉桥拉索振动效果的最可靠手段。为研究某大跨度斜拉桥拉索阻尼器的性能,进行了包括阻尼器单体性能试验、双阻尼器及其实索固定装置组合系统足尺试验、阻尼器耐久性试验及阻尼器实索减振试验在内的全系列试验。详细研究了各种可能因素对阻尼器减振效果的影响,试验结果表明,试验阻尼器的力学性能与设计的线性特性吻合较好;支撑装置与连接件的缝隙不会降低阻尼器的减振效果;试验阻尼器具有良好的耐久性,并给出了阻尼性能随加载次数的退化规律表达式,供设计参考;试验阻尼器抑制实索振动的效果明显,经分析确定,拉索的边界条件是实索减振试验实测值与理论值两者之间产生误差的重要原因之一。The stay cable can be easily excited to vibrate. Oil dampers are proposed to mitigate the cable vibration of a long span cable-stayed bridge. Based on previous studies, experiments are deemed necessary for evaluating the effectiveness of the dampers. A series of experiments were carried out, including preliminary tests on dampers alone, such as the performance test of a single damper, a full scale test of dampers with sockets, a durability test and a full- scale actual cable vibration mitigation test. Tests results indicate that the data match the design values well. The test setups to support the dampers would not degrade the damping effect. The test damper performs well after 4 million load cycles and a degenerated mode is provided to assist the damper design. The test damper is shown to be effective in the vibration mitigation of the stay cables. Because of the deviation of the full-scale cable vibration mitigation test results from the analytical results based on current theory, boundary condition was taken into consideration in both experimental and analytical studies.

关 键 词：斜拉桥 拉索减振 阻尼器 性能试验 耐久性试验 实索试验 性能退化 使用寿命 

分 类 号：TU973.31[建筑科学—结构工程]