Analysis Of Parameters Affecting The Action Effect Of Steel-concrete Composite Beam Continuous Rigid Frame Bridge

This special bridge concrete continuous rigid frame bridge,the author of this paper,on the overall design,and using the orthogonal experiment design method,build a bridge of 25 typical samples,and through the poor and variance analysis method,all kinds of the most disadvantageous section internal forces of the bridge impact factor analyses of stress and displacement of concrete continuous rigid frame optimization design provides certain reference meaning,at the same time compare hybrid girder continuous rigid frame and continuous beam bridge,the main research results are as follows.(1)The whole bridge model was modeled and analyzed by Doctor Bridge 4.0,and the calculated results were reviewed by the corresponding specifications,which comprehensively demonstrated the overall design and checking process of the continuous rigid frame bridge with mixed beams.(2)The order of the factors which affect the shear force at the top of the pier of the outer pier of the composite beam continuous rigid frame is: The ratio of the length of the steel-concrete structure,the ratio of the mid-span to the height of the span,the ratio of the height to the span of the Fulcrum,the thickness of the thin-walled Pier,the distance between the thin-walled pier and the Parabola of the beam bottom;The order of the factors that affect the shear strength of the pier supports of the hybrid beam continuous rigid frame is: the ratio of mid-span to height,the ratio of steel-concrete length,the ratio of the height to span,the distance between thin-walled piers,the thickness of thin-walled Piers,and the parabola index of the beam bottom The order of the factors that affect the shear force of the 1/4 joint of the continuous rigid frame of hybrid beam is steel-concrete length ratio,mid-span height-span ratio,thin-wall pier thickness,thin-wall pier spacing,Parabola of beam bottom and height-span ratio of fulcrum.(3)The primary and secondary order of the factors affecting the bending moment at the bottom of the pier of the outer pier of the composite beam continuous rigid frame is:The thickness of the thin-walled Pier,the Parabola of the beam bottom,the ratio of the height to the span of the Fulcrum,the distance between the thin-walled Piers,the ratio of the height to the span of the middle span and the ratio of the length of the steel-concrete.The order of the factors that influence the moment of the pier supports of the hybrid beam continuous rigid frame is: the ratio of span to middle height,the ratio of steel-concrete length,the thickness of thin-walled Pier,the distance between thin-walled Pier,the parabola index of the beam bottom and the ratio of height to span of the supports The order of the factors that affect the mid-point bending moment of the composite beam is as follows: the ratio of mid-span to height,the ratio of Fulcrum to height,the distance between thin-walled piers,the Parabola of the beam bottom,the thickness of thin-walled piers and the ratio of steel-concrete length.(4)The order of the factors that affect the mid-point normal stress of the hybrid beam is: The ratio of mid-span to height,the ratio of steel-concrete length,the thickness of thin-walled Pier,the distance between thin-walled Pier,the Parabola of the beam bottom and the ratio of height to span of the fulcrum The order of the factors that affect the mid-point normal stress of the hybrid beam is as follows: The ratio of mid-span to height,the ratio of steel-concrete length,the thickness of thin-walled Pier,the distance between thin-walled Pier,the Parabola of beam bottom and the ratio of height to span of Fulcrum.(5)When the basic design parameters are basically the same,the effect of each action of continuous rigid frame bridge and continuous beam bridge is different.The Longitudinal moment of continuous rigid frame bridge is different from that of continuous beam bridge.At the joint of steel-concrete joint and concrete and steel beam,the influence efficiency is the biggest,its value is 216.95% and 217.25%respectively The displacement value of continuous rigid frame is different from that of continuous beam bridge,the effect efficiency is the biggest at 3 / 4 node of side Span,the value is 55.55%,the effect is obvious,the normal stress value of continuous rigid frame is different from that of continuous beam bridge,at the 1 / 4 node of the side Span,the influence efficiency is the largest,and the value is 125%,respectively.