ABSTRACT
I
Computational Analysis of Static and Stability of Steel Box
Tied Arch Bridges
ABSTRACT
In the mid-to-late 1990s, China's steel output has increased rapidly. Therefore, China has
promoted the use of steel structures in the construction industry. Bridge construction is no
exception. In recent decades, the construction of steel bridges in China has increased. With the
rapid development of bridge technology in China, designers prefer the construction of
lightweight, green and environmentally friendly steel bridges. The research object of this
paper is a large-span steel box tied arch bridge. Through reviewing the relevant information of
the steel box tied arch bridge, the classification, characteristics and research status of the
domestic and international engineering cases are discussed. Based on the actual engineering
case of a steel box tied arch bridge, The structural calculation and analysis of the steel bridge
tied arch bridge is carried out, and the static analysis and the full bridge stability analysis
results of the construction stage and the bridge stage are obtained. Through the analysis and
calculation results of the construction stage and the bridging stage of the tied arch bridge, the
main arch, auxiliary arch, main beam stress, tie bar stress, main boom and auxiliary boom
stress are met in the construction stage. The maximum horizontal displacement of the cap in
the construction stage and the key section displacement of the bridge and the ten-year
contraction and creep stage are within the control range; the maximum bending stress and the
maximum shear stress of the main arch rib, the auxiliary arch rib and the main beam in the
bridge stage meet the specification. Requirements; the stress of the tie rod in the bridge stage,
the stress of the main boom, the secondary boom, the deformation of the main arch, the
auxiliary arch and the main beam all meet the requirements of the specification; the stiffness
of the main arch, the auxiliary arch and the main beam of the vehicle load are all satisfactory;
A negative reaction force occurs at the support stage of the bridge, the size is 144.2kN, and it
is recommended to use reasonable measures to solve it; after the overall stability analysis of
the bridge, the critical load factor of each buckling mode is greater than 4~5, so The overall
stability and safety performance of the steel box tied arch bridge can be guaranteed at all
stages; through the local stability analysis of the bridge, the local stability calculation of the
arch rib, main beam and bridge deck is full. Full specification requirements. Based on the
above analysis and calculation of the static and stability of the long-span tied arch bridge, the
stress and deformation of the bridge structure in different construction stages are understood,
the overall and local stability of the bridge structure is understood, and the calculation results
are compared with the specification requirements. The reliability of the original design
parameters is verified and relevant revision opinions are proposed to provide theoretical
guarantee for the safe and smooth construction of the bridge, and provide reference for the
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