【作者】 江凌；

【导师】 韩西；

【作者基本信息】 重庆交通大学 ， 桥梁与隧道工程， 2008， 硕士

【摘要】 本文针对大跨度钢筋混凝土箱型拱桥的车振响应分析以及被动减振控制问题展开,在查阅国内外相关资料的基础上,对桥梁结构振动被动控制原理与方法进行了研究,并对调谐质量阻尼器(TMD)和多重调谐质量阻尼器(MTMD)的设计原理及制作技术进行了探讨。在理论分析的基础上,本文对四川金沙江通阳大桥(上承式钢筋混凝土箱型拱桥)进行了有限元仿真分析,研究了大跨度钢筋混凝土箱型拱桥的自振特性;在大型通用有限元软件ANSYS中对通阳大桥分别进行模态分析和移动荷载响应时程分析,研究了通阳大桥的动力特征及其在行车荷载作用下的响应特性;在ANSYS中建立的通阳大桥拱桥模型上加入MTMD系统,以加速度和动位移为控制目标,计算验证MTMD系统对拱桥减振控制的有效性。在对通阳大桥进行有限元仿真分析的同时,本文作者在重庆交通大学结构实验室采用有机玻璃材料建立了拱桥实验模型。模型与实桥比例为1:50,并对实桥进行了一定简化。随后对拱桥模型进行模态分析,研究了其动力特性和行车荷载下的动力响应。根据拱桥模型在行车荷载下的动力响应设计出控制MTMD的相关参数,以结构动位移为控制目标,对比拱桥模型安装MTMD前后行车响应,验证了MTMD对于拱桥模型振动控制的有效性。在对比实桥仿真分析和模型实验的减振控制结果的基础上,本文对加入TMD后结构体系的受力性能和结构-TMD系统方案进行总结研究,为实际结构的TMD减振控制设计提供可行性方案,以期能将研究成果应用到实际工程中。更多还原

【Abstract】 This thesis mainly deals with studies on the principle and method of passived vibration control of long-span reinforced concrete box-typed arch bridges, the design principle and the process technology of TMD (Tuned Mass Damper) and MTMD(Multi Tuned Mass Damper) at the same time, on the basis of references to the previous researches in China and abroard. Based on theory analiyse,this thesis study the vibration response of long-span reinforced concrete box-typed arch bridges. With the establishment of the finite element modal of Shichuan Tong Yang arch bridge(long-span reinforced concrete box-type arched bridge), studies on the characters of natural vibration of long-span reinforced concrete box-type arched bridge are carried out, on the basis of anlyzing the modal and time-marching, studies on the dynamic behaviors of Tong Yang arch bridge and its response character under random load are made specifically in ANSYS. The validity of TMD and MTMD on arched bridge’s vibration control is also verified though ANSYS analyze.As the studies of vibration control of long-span arch bridges by finite element alalyze, study in bridge modal is also carry out. The test model of Jinshajiang Tong Yang Bridge with a scale of 1:50 to actul bridge is established by organic materials in Chongqing Jiaotong University, and according to the dynamic response of the model under random dynamic load, the TMD parameters are optimized. By the contrast of dynamic response of arched bridge with and without TMD and MTMD, the validity of TMD and MTMD on arched bridge’s vibration control is verified.By the contrast of dynamic control validity in finite element analyze of Tong Yang bridge and in arch bridge modal study, this thesis give some methods of TMD and MTMD design which are hoped to be used to actual civil engingeer in the future.更多还原