Structure for improving transverse rigidity of large-span cable-stayed bridge

Abstract

The invention provides a structure for improving transverse rigidity of a large-span cable-stayed bridge. According to the structure, the transverse rigidity of a main span of a bridge is effectivelyimproved, the dynamic characteristics of the bridge are obviously improved, the safety and comfort during running of a train are ensured, and the construction cost of the bridge is reduced. The stay cable comprises a side span stay cable with two ends correspondingly anchored on a bridge tower and a side span girder and a middle span stay cable correspondingly anchored on the bridge tower and a middle span girder, wherein the middle span stay cable is composed of a pair of a left stay cable and a right stay cable, and the bridge tower comprises a left tower column and a right tower column. Anupper end anchoring point of the left stay cable is arranged on the left tower column, and a lower end anchoring point is arranged on the right side of the middle span girder. An upper end anchoring point of the right stay cable is arranged on the right tower column, and a lower end anchoring point of the right stay cable is arranged on the left side of the middle span girder. The pairs of left stay cables and the right stay cables transversely cross in the transverse direction of a bridge to form a spatial crossed cable surface, and form a closed triangle in the space with the section of themiddle span girder.

Description

technical field [0001] The invention relates to a cable-stayed bridge, in particular to a structure for improving the lateral stiffness of a long-span cable-stayed bridge. Background technique [0002] In recent years, my country's bridge construction has achieved rapid development, and the transportation network has become more dense and perfect. The construction of passenger dedicated lines and high-speed railways has reached its peak. More and more long-span cable-stayed bridges have become important projects in railway or highway construction. However, some of these bridges have relatively narrow girder widths required by their own functions, and how to meet the requirements for lateral stiffness of long-span cable-stayed bridges has also become a design difficulty. [0003] When a high-speed train passes through a bridge, the bridge will vibrate, and if the vibration amplitude is too large, it will affect driving safety and passenger comfort. Bridge vibration is direct...

AI Technical Summary

Problems solved by technology

[0004] Long-span railway cable-stayed bridges have low lateral stiffness due to their large spans and narrow bridge decks.

Images