Bridge

Abstract

The invention discloses a bridge which comprises I-shaped beams (1), wherein each I-shaped beam (1) comprises a top flange (1a), a bottom flange (1b) and a web (12) supported between the top flange (1a) and the bottom flange (1b), wherein the I-shaped beams (1) are multiple and are arranged side by side, and two adjacent I-shaped beams (1) are connected mutually. Through connecting two I-shaped beams (1) mutually, the stability of integral bridge can be improved, and the vertical rigidity of the bridge is improved.

Description

technical field [0001] The present invention relates to the construction field, and more specifically, to a bridge. Background technique [0002] A bridge is a structure built for roads to cross natural or man-made obstacles, for example, bridges across rivers and ravines. Typically, a bridge includes a girder and piers supporting the girder. According to different purposes, bridges can be divided into road bridges and railway bridges. [0003] At present, with the increasing number of means of transportation, roads and railways have begun to develop from the ground to the air, forming an increasing number of road bridge projects, but there are many problems in today's road bridge structures: the design load of the bridge is "medium-live load". If the load factor is too large, the safety reserve of the bridge will be greatly reduced, and long-term operation will have a greater negative impact on the safety of the bridge; under the long-term load of trains and large passeng...

AI Technical Summary

Problems solved by technology

[0003] At present, with the increasing number of means of transportation, roads and railways have begun to develop from the ground to the air, forming an increasing number of road bridge projects, but there are many problems in today's road bridge structures: the design load of the bridge is "medium-live load". If the load factor is too large, the safety reserve of the bridge will be greatly reduced, and long-term operation will have a greater negative impact on the safety of the bridge; under the long-term load of trains and large passenger and freight vehicles, the fatigue damage of the bridge structure will be aggravated, and the safety reserve of the bridge will be greatly reduced ; When a vehicle passes a bridge at a certain speed, it will produce a vertical dynamic effect, and the dynamic coefficient is generally used (the ratio of the maximum response value of the bridge due to the vertical action of the vehicle passing through to the maximum response value of the vertical action of the vehicle when it is stationary) The main factors affecting the dynamic coefficient are the form and span length of the bridge structure, the type of rolling stock, the equipment status of the bridge line, etc.; under the long-term load of trains and large passenger and freight vehicles, the fatigue damage of the bridge structure will be aggravated. Affect the fatigue performance of the bridge and shorten the fatigue life of the structure, so it is urgent to study a new type of composite bridge

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