Large-span concrete-filled steel tubes arch bridge vibration inhibiting system based on anti-seismic property
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A technology of anti-seismic performance and concrete, which is applied in the direction of arch bridges, bridges, bridge forms, etc., to achieve the effects of high reliability, simple connection and strong operability
Inactive Publication Date: 2017-06-13
SICHUAN VOCATIONAL & TECHN COLLEGE OF COMM
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[0004] The purpose of the present invention is to overcome the existing long-span arch bridge in the prior art. Under the action of earthquake load, in order to ensure the anti-seismic safety performance of the bridge, it is necessary to limit the longitudinal, lateral and vertical vibration amplitude of the bridge deck beam, and the sling To solve the above-mentioned problems of vibration amplitude, provide a vibration suppression system for long-span concrete-filled steel tube arch bridges based on anti-seismic performance
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Embodiment 1
[0044] Such as figure 1 , 8 , 9, a long-span concrete-filled steel tube arch bridge vibration suppression system based on seismic performance, including the main arch 1 and deck girder 2, as well as a number of suspension cables 4 between the main arch 1 and deck girder 2, and include:
[0045] At least one anti-vibration cable 5 transversely connects all said slings 4 into an integral structure;
[0046] A plurality of longitudinal limit damping devices 8 are arranged between the bridge deck girder 2 and the correspondingly installed bridge piers 3;
[0047] Two lateral limit damping devices 9 are arranged at the positions where the two ends of the main arch 1 intersect with the deck beam 2 respectively.
[0048] Such as figure 2 As shown, the above-mentioned anti-vibration cables 5 and all the suspension cables 4 are connected to each other through binding wires 71 . The binding wire 71 can be made of high-strength fiber plastic material, and can ensure that the anti-w...
Embodiment 2
[0061] Such as Figure 5-7 As shown, the present embodiment provides an installation method for the anti-vibration cable 5, including the following installation steps:
[0062] Step 1, set the traction cable at both ends of the anti-vibration cable 5 to pass through the reaction force frame 6 and the corresponding anchor 64;
[0063] Step 2: Install two tensioning reaction frames 6 on the steel pipe cross-links 12 at both ends of the main arch 1, pass the anti-vibration cables 5 through the reaction frames 6, and stretch the anti-vibration cables 5 to the design tension;
[0064] Step 3, anchoring and locking the anti-vibration cable 5;
[0065] Step 4, binding the anti-vibration cables 5 and each of the slings 4 into an integral structure.
[0066] By adopting such installation steps, the anti-vibration cable 5 is simple and reliable to install, and has strong operability. It has been proved by engineering application that this construction technology makes the cable suspe...
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Abstract
The invention discloses a large-span concrete-filled steel tubes arch bridge vibration inhibiting system based on the anti-seismic property. The large-span concrete-filled steel tubes arch bridge vibration inhibiting system comprises a main arch, a bridge floor beam, multiple slings arranged between the main arch and the bridge floor beam, at least one anti-seismic rope, multiple longitudinal limiting damping devices and two transverse limiting damping devices, wherein all the slings are transversely connected through the anti-seismic ropes into an overall structure, the longitudinal limiting damping devices are connected between the bridge floor beam and correspondingly installed piers, and the two transverse limiting damping devices are arranged at the cross positions of the two ends of the main arch and the bridge floor beam. According to the large-span concrete-filled steel tubes arch bridge vibration inhibiting system based on the anti-seismic property, by means of the vibration inhibiting technology of building the main arch and the slings and the vibration inhibiting technology of the main arch and the bridge floor beam, the problem that under the action of seismic loads, the slings are large in vibration amplitude, the longitudinal, transverse and vertical vibration amplitude of the bridge floor beam is large to cause mesomerism can be effectively solved, anti-seismic safety property of a bridge is ensured, reliability is high, the service life of the vibration inhibiting system approximates to that of a major structure, maintenance and replacement in the using process are avoided, and the engineering cost is low.
Description
technical field [0001] The invention relates to the field of bridge design, in particular to a vibration suppression system of a long-span concrete-filled steel tube arch bridge based on anti-seismic performance. Background technique [0002] Existing bridges have larger and larger spans. For extra-long-span arch bridges, a number of suspension cables are connected between the main arch and the bridge deck girder. Large, under the action of earthquake load, when the main arch and the deck girder produce longitudinal and lateral displacements, due to the large difference in the length of the slings, the vibration amplitude of each sling is inconsistent and cannot be coordinated, which will easily cause all slings to If the vibration amplitude is too large, it will damage or accelerate the vibration of the bridge deck girder; in addition, under the action of earthquake in all directions, the bridge deck girder will generate large vibration force and vibration amplitude in the ...
Claims
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Application Information
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