Optimal Placement of Dampers for Seismic Control of Long-Span Suspension Bridges: Method and Application
In this paper, 3 kinds of assessment functions for seismie response control effect are formulated based on the mechanism of seismic displacement control with dampers and the seismic response characteristics of long-span suspension bridges. A new optimal placement method of dampers using penalty function and first order optimization theory is then proposed. Runyang suspension bridge (RSB), with a main span of 1490m is then taken as an example. After seismic response time-history analyses on RSB using different placement of dampers are earried out with the optimal placement method, the optimal placements of dampers with the three assessment functions are then achieved respectively. Comparison analysis results from the three optimal control effects show that different assessment functions ean lead to different optimal placements when the number of dampers is certain, so the selection of assessment functions and optimal placements is determined by the struetural eharaeteristies and what is considered in the structures. Resuhs also show that any placement of dampers can reduee the seismic response of RSB significantly when the parameters and placement of the dampers are proper.
Suspension bridge Seismic control Optimal placement Assessment function Time-history analysis Damper First order optimization Application
Hao Wang Aiqun Li Tong Guo
College of Civil Engineering, Southeast University, Nanjing, China
国际会议
南京
英文
245-252
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）