| With our Bridges of health surveillance technologies of a sustained development,in almost 40 years of development has accumulated extensive experience of processing surveillance data,meanwhile,access to more types of levels and use of surveillance data and make it fully coman,for surveillance studies of Bridges,more mature existing tension on the basis of displacement surveillance,etc,Advance by combining the intelligence of the giant giant force technical surveillance one of the points became research,hamrin surveillance include surveillance against the force of the giant giant cannon and displacement,analysis of surveillance data ina timely and correct manner,effective to stable security Bridges warning,It is the core of the entire bridge monitoring area that supports the practical application of the development of occupational safety in engineering.As an important part of the bridge,the support has the function of transferring load and deformation,and has been widely used on the bridge.However,in recent years there have been several safety accidents on Bridges caused by the destruction of supports and the state of operation of the supports before and after other safety accidents on Bridges should be given sufficient attention.While there are many reasons for these bridge safety accidents,it is undeniable that bridge supports play an irreplaceable role in all of them.In order to avoid the repetition of bridge safety accidents,in view of this,it is important and valuable to investigate bridge supports in depth.The following aspects are studied in this paper:(1)Mainly focuses on the analysis of the reaction force of the support under different conditions of a beam bridge with column and column curve.The finite element model with different radius of curve and spacing of the supports is obtained for various working conditions.The stability is analyzed together with the tipping resistance coefficient.(2)In the case of continuous beam,according to the line of influence of the bearing reaction in the section of box beam there is a reduction of stiffness will occur the difference and its extreme values,according to the curvature of the difference of the bearing reaction to make the curve,it was found that the curve of curvature exists a peak,and the peak is more obvious in the position of the damage,so the peak is available to locate the position of the damage.Then,through numerical simulation to analyze the different damage conditions of a three-section continuous steel case beam,the identification effect is better,and it is verified that the reaction support continuous steel case beam affects the damage of the identification line is the same adaptable for continuous steel case beam.(3)Study of early warning methods for support surveillance.The field of bridge health surveillance has been supplemented and refined to some extent by the combination of support reaction monitoring and support displacement monitoring,and it has been concluded that displacement changes caused by temperature are the main factor affecting the accuracy of the surveillance.The effects of thermoinduced displacements are mathematically minimized in order to improve the monitoring system.Figure [72] table [18] reference [80]... |
