Beam bridge with ultrahigh pier concrete filled steel tube continuous beam anti-seismic structure system

Abstract

The invention discloses a beam bridge with an ultrahigh pier concrete filled steel tube continuous beam anti-seismic structure system. The beam bridge comprises a plurality of piers with unequal heights and a main beam arranged on the piers. The main beam and the piers are mutually connected through supports. The higher the piers are, the larger the shear rigidity values of the supports adopted by the piers for being connected with the main beam are, namely, the shear rigidity values of the supports, connected with the main beam, of the higher piers are larger, and the shear rigidity values of the supports, connected with the main beam, of the lower piers are smaller. The piers with different heights of the structure system adopt the supports with different shear rigidity values for matching, so that the total rigidity values formed by connecting of the piers with the different heights and the main beam are matched one another, and the rigid frame-limiting connecting beam structure system is formed. In the system, the piers and the supports are balanced in integral rigidity and coordinate and uniform in deflection, so that anti-seismic performance is improved by a large margin; and meanwhile the comfort of vehicle driving is improved due to the fact that the number of the supports and the lengths of expansion joints are decreased.

Description

technical field [0001] The invention relates to the field of bridge design, in particular to a girder bridge with a superhigh pier concrete continuous girder anti-seismic structure system. Background technique [0002] Existing bridges in mountainous areas have larger spans and higher pier heights; for existing bridges with small and medium-span simply supported structures, the pier height is generally less than 60 meters, and the joint length of the main girders is not greater than 200 meters. With the development of high-grade highways to mountainous areas, the bridge piers are larger than 60 meters. If the main girder joint length is still 100-200 meters, the dynamic performance will be poor due to the high piers, which cannot meet the seismic requirements. At the same time, due to the rugged mountainous terrain, high mountains and deep valleys, there are still height differences between different piers of the same bridge, and the heights of most bridge piers are quite di...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome existing mountainous bridges in the prior art due to the large difference in height between the piers, which causes the stiffness matching of different piers of the whole bridge to be uncoordinated, resulting in poor stiffness of the bridge, thereby affecting The above-mentioned problems of the seismic performance of bridges in mountainous areas provide a beam bridge

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