Application Of TMD And MTMD In Arch-bridge Vibration Control

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.