Study On The Mechanical Behavior Of Steel Corrugated Plate Arch Culvert With Different Center Angle

The circular arch culvert of steel corrugated plate has good mechanical behavior and convenient construction,which has been used in engineering,but there is little research on its theory.On the basis of collecting and summarizing the research data about steel corrugated plate arch culvert at home and abroad,this paper takes steel corrugated plate arch culverts with different central angle as the research object.The main research contents include: mechanical behavior difference of arch culverts with different central angle,structural design and construction technology of arch culverts.The study of the arch culverts' mechanical behavior is mainly carried out by using finite element software ANSYS.The displacement and stress around crown,lumbar and foot,which are in steel corrugated plate arch culverts with the central angles of 135°,150°,165°,and 180°,are analyzed.The main results are as follows:1?Steel corrugated culverts are mainly closed and open cross-sectional shape and have a wide range of uses.Due to the existence of axial corrugated around steel corrugated structure,it has a good carrying and deformation capacity.2?Compared with the reinforced concrete arch culvert,the distribution of internal force around steel corrugated plate arch culvert is more reasonable.The deformation and the soil stress are larger,and the external load is smaller.The horizontal thrust of steel corrugated plate arch culverts with different center angle is quite different,but it satisfies the basic rule of arch culvert with small span ratio and large horizontal thrust.3?Through simulating and comparing steel corrugated plate arch culverts with the central angles of 135°,150°,165° and 180°,the change characteristics of displacement and stress around crown,lumbar and foot,which are in steel corrugated plate arch culverts with different center angle,are obtained under the filling height of 3m.At the same time,the variation laws of vertical displacement and stress around arch culverts nodes with time are getted under the action of movable live load 80 kN.4?The finite element software is used to simulate and analyze steel corrugated plate arch culverts with different center angles under different filling heights,arch culvert spans and arch foot displacements.The results are as follows:(1)the variation laws of maximum vertical displacement and stress around wave crest and wave vale are obtained under different filling heights.The growth rate of maximum vertical displacement is not the same before or after the filling height of 5m;(2)the variation laws of displacement and stress around wave crest and wave vale are acquired under different arch culvert spans;(3)The change characteristics of vertical displacement around the soil and arch culvers are gained in different arch foot displacement.5?The domestic "norm" and AISI structure design method of steel corrugated plate arch culverts are simple and the design control factors are small.But CHBDC method takes into account a number of factors as design control factors,and it can accurately calculate the structure stress under loads.So CHBDC design method is more reasonable.6?The construction of steel corrugated plate arch culverts has been studied.It mainly includes: the treatment methods of different foundation,the settings of connection structure around arch foot,the installation of steel corrugated plate and the requirements of backfill construction.The research results can contribute to understand mechanical behavior of steel corrugated plate arch culverts with different central angle,solve the technical difficulties,and also have a certain reference value for the improvement of design and construction specifications about steel corrugated plate arch culverts.