Evaluation of Wind-Resistant Stability of Large Span Highway Bridge Based on Improved Similarity and Extension Theory

Abstract

In order to accurately evaluate the fighting-wind stability of large span highway bridges, a method based on improved similarity extension theory is proposed. According to the standard for wind-resistant design of highway bridge Bridge, Width of main beam cross section, Density ratio, Bending frequency, angle of attack, basic wind speed and other 12 indicators as long-span bridge wind-resistant evaluation factors. First of all,by the theory of extension theory, by the introduction of the classic domain, section domain and the concept of meta-material, and through the Matter-element transformation we build large span bridge wind-resistant stability evaluation of the material element system and calculate the stability of the evaluation indicators Rank correlation coefficient. Then, we use the improved similarity right method to determine the weight coefficient of the matter-element index system, and establish the similarity element-element extension evaluation model to evaluate the wind-stabilizing performance of long-span bridge. Finally, a comprehensive evaluation of the wind stability performance of a large span suspension bridge is carried out, and the practicability and reliability of the model are verified.