Calculation And Control Research On Suspension Bridge Anchor-span's Strand Tension

Suspension bridge has become the undisputed main bridge type across the river, cross Harbor,and other obstacles for its good mechanical properties,the ability to leap large,beautiful light,good seismic performance and many other advantages.Currently, there are many difficult issues for long-span suspension bridge anchor span strand tension of the calculation theory,control and monitoring of anchor span's strand and so on,based on YuZui Yangtze River Bridge,the above-mentioned problems were discussed and improved in aspects of calculated pattern,methodology as well as monitoring.First of all,the paper analyzed the theory and characteristics of strand's vibration, and studied the vibration law of strand with the change of boundary conditions,bending rigidity,sag,the quality of additional and environmental factors.Secondly,the thesis introduced the current traditional calculation theory of suspension bridge anchor-span's strand tension,analyzed the reasonable mechanical mode of strand's tension with the dead loads,compared the characteristics between the approximate calculation and accurate calculation,and derived the iterative calculation method of anchoring the strand and amendind method with the temperature'change,as well as it introduced the latest controling,adjusting and monitoring technology of suspension bridge anchor tension and conventional control method.Finally,through the YuZui Bridge's analysis of theoretical calculations and actual results,the calculation,control and monitoring method of anchor span's strand tension which was derived in the article can satisfy regulatory requirements relating to the country,as well with good effect.