Pier top displacement spring limiter for high-pier bridge

Abstract

The invention discloses a pier top displacement spring limiter for a high-pier bridge. Stiffening steel plates are respectively arranged on a stand column or the lateral side of a cover beam and the bottom of a main beam; the stiffening steel plates are connected with the stand column or the cover beam, and the main beam through bolts; a plurality of springs are arranged between vertical stiffening steel plates anchored on the stand column or the lateral side of the cover beam; the other ends of the springs are fixed on the same steel plate, and a certain clearance is reserved between the steel plate and a steel plate anchored on the main beam to play a limiting role when the longitudinal displacement of the pier top is too large; the connection between the stiffening steel plate and the cover beam as well as between the stiffening steel plate and the beam bottom is designed according to anchoring requirements. When the displacement of the pier top is too large, soft collision can enable the springs to deform and consume energy so as to reduce and limit the displacement, the accumulated effects can be reduced and limited, and the phenomenon that because the accumulated displacement of the pier top is too large, the stress of the pier is adverse can be avoided; besides, the performance of the pier top displacement spring limiter can be adjusted through the adjustment of the width of the clearance and the category of the springs.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a displacement spring stopper for the pier top of a high-pier bridge. Background technique [0002] Due to the low longitudinal rigidity of the pier columns in high-pier bridges, when the contact surface between the bottom of the beam and the support surface is not horizontal, due to the effects of bias pressure, vehicle braking force and temperature difference, an unbalanced horizontal thrust will be generated on the top of the pier, causing the pier to collapse. The top produces a longitudinal offset. It is difficult to estimate the displacement of the top of the pier due to the nonlinear effect of high-flexible bridge piers, and with the long-term accumulation of the effect, if no control measures are taken, the displacement of the top of the pier will exceed the limit, resulting in the deviation of the support position or the displacement of the basin s...

AI Technical Summary

Problems solved by technology

[0011] It is not difficult to see from domestic and foreign research that the current research on various stoppers is basically based on the purpose of shock absorption, and there is no relative displacement between the pier top and the main girder caused by the long-term nonlinear effect of high bridge piers. If the situation is too large to design a limiter

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