Research on a Smart External Prestressed Bridge with Position-Adjustable Saddles
This paper is based on such a widely accepted concept that if the equivalent load of prestressing balances the applied load,the beam structure would have no deflections.Though there are many factors generating deflections,it is still feasible to control the bridge deformation by regulating the magnitude and distribution of equivalent action of external tendons.In the numerical example,the regulating procedure could be easily realized by setting a series of length-adjustable bars as the saddles of externally prestressed bridge.When the length of these bars varied to some rules,both the configuration and tension of the cable would be affected and vary remarkably,hence the equivalent load and distribution of external prestressing vary correspondingly.The calculation shows the relationship between the bar elongation and the adjust value of the key points deformation is not purely linear as well.This paper provided an effective arithmetic to establish the relationship,which could calculate an accurate numerical solution and supply correct adjusting magnitude for the smart controlling.
Prestressing smart bridge equivalent load deflection
Jing Wu Zhishen Wu Xiangke Liang
International Institute for Urban Systems Engineering,Southeast University,China International Institute for Urban Systems Engineering,Southeast University,China;Department of Urban College of Civil Engineering,Southeast University,China
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）