Studies On In-plane Stability Behavior And Practical Calculation Methods Of Two-hinged Parabolic Arch

Arch Bridge is an ancient form of bridge, with a long history. With the development ofscience and technology, the modern arch bridge is turning toward the large-span direction todevelop. So as the primary compression artifacts, Arch Bridge stability problems has becomemore and more prominent, be the main factors restricting the development of its. Using finiteelement method to study this subject in-plane stability performance of two-hinged parabolic arch,and finally gives a practical calculation method.First of all, the article studied two-hinged parabolic arches subjected to uniform load on ahorizontal projection of in-plane elastic buckling behavior, getting more accurate eigenvaluebuckling load and buckling mode. Considering the effect of buckling and shear deformationeffects before impact, and rise-to-span ratio and slenderness ratio. And stability of the Arch ofthe classical theory of elasticity are compared, pointed out that lack of classical elasticity theory.Second, this paper studies the ultimate bearing capacity of two-hinged axial compressionof parabolic arches. Considering slenderness ratio, rise-to-span ratio, initial geometricimperfection and different section types of bearing capacity of axial compressive Arch effect.Pointed out that the section types of changes, other factors have varying degrees of effect onbearing capacity of Arch.Again, this article further research has by symmetric Dutch contains (full across are clothweight Dutch contains, and Vault concentrated Dutch contains) and does not symmetric Dutchcontains (half across live contains K=0, and does not symmetric live contains K=0.5) role Xia ofaxis force and bent moments common role of two hinged parabola Arch of plane within limithosted force, and analysis has Arch of vector across than, and long fine than, and initial geometrydefects this several typical factors on its limit hosted force of effect.Then, This paper analyzes and compares some of the specifications related to in-planestability of arch bridge, including Load and Resistance Factor Design(LRFD) specification (2004)of American Association of state Highway and Transportation Officials(AASHTO), Eurocode3(BS EN1993-2:2006) specification of European Committee for Standardization, DIN18800(1990) specification of German Committee for Structural Steelwork, Specifications for highwaybridges of Japan Road Association road (2004) and TB10002.1-2005specifications of China.Pointed out that national norms on design thinking and design method of the difference.Finally, combined with the related studies at home and abroad and the research results ofthis paper, it gives in-plane stability of bearing capacity design formula of two-hinged parabolaarch which subjected to symmetric and asymmetric loads.