Design and manufacturing method ofsoft steel material with damping anti-seismic device for bridge

Abstract

The invention discloses a design and a manufacturing method of a soft steel material with a damping anti-seismic device for a bridge, and relates to a steel formula. The detailed ratio which is designed in a formulaaccording to the mass percentage ratio of a component element of a steel type refers to the claim. The manufacturing method comprises the steps of smelting, continuous casting, round steel rolling, round steel finishing and finished product forging. A low-carbon aluminum killed steel with a specified chemical component range is prepared according to the formula and the manufacturingmethod, and meanwhile, element contents of P and Swhich influence plastic performance are strictly controlled, and the residual element contentsare controlledand thennot only tensile strength and yield strength of the soft steel are guaranteed to be within a certain strength range, but also the specific value of the yield strength and the tensile strength is not greater than 0.72, and a manufactured anti-seismic isolation device is excellent in equivalent damping ratio and low-cycle fatigue performance, so that the use requirements of stress and energy absorption and seismic resistance of a railway bridge comprehensive working condition are met.

Description

technical field [0001] The application relates to steel formulations, in particular to the design and manufacturing method of a damping and anti-seismic mild steel material for bridges. Background technique [0002] Under extreme natural conditions (such as earthquakes, typhoons, etc.), elevated buildings such as railway bridges suffer great structural damage. For elevated buildings such as railway bridges and piers, the most vulnerable part is the pier or the connection point between the pier and the bridge. On the one hand, this kind of damage will cause lateral movement and dislocation between the bridge and the pier if it is light, and it will cause the bridge to slide off the pier if it is serious, which will bring a fatal threat to driving safety. On the other hand, bridges need to be repaired easily and quickly after the earthquake causes damage. Traditional anti-seismic design often achieves the purpose of storing and consuming energy by strengthening the building ...

AI Technical Summary

Problems solved by technology

There are three obvious shortcomings in this design method of using the reinforced structure itself to ensure the seismic requirements: (1) the strengthening of the structure itself will significantly increase the construction cost; Under the condition of different natural forces (such as different seismic wave forms and directions), the structure itself may still not meet the safety requirements; (3) Once the structure is damaged or destroyed by the earthquake, the cost of repair or reconstruction is high

At present, there is a lack of a mild steel material that meets the requirements of damping shock absorbers for railway bridge fall prevention beams.

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