Long-span Bridges With Corrugated Steel Webs Buckling Analysis And Design

With the rise of long-span bridges and the development of a continuous girder bridge with corrugated steel webs as a class of large-span structures suitable for the application of new bridge, the transmission power line clear, reasonable force distribution, seismic effects of good quality and performance efficiency high, and light weight, good economic results, the appearance of novel structures for the development trend of China's bridge. With this type of bridge is the most typical features of the application of corrugated steel webs, which requires calculation in the design process is not only a strength issue, but also for instability control.Corrugated steel web bridge force distribution, is essentially a concrete floor and roof to carry the role of axial force and bending moment, shear wave plate is shared. Under shear, the wave plate's design should not only consider the yield condition, has to take into account the shear buckling, shear buckling modes include local buckling, overall buckling and combined buckling.This thesis are as follows:1)Relying on two fast lines, Nanping,Shenzhen, Nanshan Bridge (main bridge span arrangement:80m+130 m+80 m, long-span continuous beam structure) calculation of the shear theory of knowledge, put forward the concept of buckling safety curve. Buckling curve by plotting the security plan, can directly be buckling to the security situation in the expression rate of reserves.2) the waveform of steel and concrete roof and floor combinations as well as the wave segment of the connection between the analysis of wave plate, thus to determine the appropriate boundary conditions, a finite element model of the wave plate through the various geometric dimensions(wave height, bending angle, straight length, the board of higher) and change control, through the drawing table, the curve of the mode of the various geometric parameters of the buckling mode corresponding to the trend;3)on high beam, beam cross-impact of change on the buckling mode of the finite element analysis shows that the bridge span and the relationship between the buckling modes:Continuous Beam Bridge span as the increase in the buckling mode of wave plate to the buckling local buckling will development.4) for buckling analysis on the safe side buckling geometry algorithms, parameter control curve was drawn, that the design and calculation of reference and query it.