CN-121992727-A - Wind-resistant mode for bridge construction of suspension bridge

CN121992727ACN 121992727 ACN121992727 ACN 121992727ACN-121992727-A

Abstract

The invention discloses a wind-resistant mode for bridge construction of a suspension bridge, which comprises a catwalk structure, a hoisting system, a stiffening girder, a construction simulation test device and control measures, wherein wind resistance is classified by utilizing the catwalk structure, the hoisting system, the stiffening girder, the construction simulation test device and the control measures, each component can be singly or cooperatively wind-resistant, the catwalk structure is arranged in a bridge construction area, the catwalk structure comprises the wind-resistant system, the stiffening girder is arranged above the catwalk structure, the stiffening girder performs dynamic characteristic analysis to control vibration in the construction process, the hoisting system is connected with the catwalk structure and the stiffening girder and is used for hoisting the stiffening girder, and the hoisting system performs wind-induced vibration response research on the stiffening girder section in the hoisting process in a typhoon stage.

Inventors

ZHOU GUANGWEI
HU HAITAO
CHEN CHANGPING
QIAN CHANGZHAO

Assignees

厦门理工学院

Dates

Publication Date: 20260508
Application Date: 20260320

Claims (10)

1. The wind-resistant mode of the suspension bridge construction utilizes a catwalk structure, a hoisting system, a stiffening girder, a construction simulation test device and control measures to classify wind resistance, and each component can resist wind singly or cooperatively; the catwalk structure is arranged in the bridge construction area and comprises an anti-wind system; The stiffening beam is arranged above the catwalk structure, and the stiffening beam performs dynamic characteristic analysis in the construction process so as to control vibration; the hoisting system is connected with the catwalk structure and the stiffening beam and is used for hoisting the stiffening beam, and the hoisting system carries out wind-induced vibration response research on the stiffening beam section in the hoisting process in typhoon period; The construction simulation test device is used for carrying out wind resistance simulation test on the whole construction process of the stiffening girder so as to determine wind load response in the construction process; The control measures are arranged in the catwalk structure, the stiffening girder and the hoisting system and are used for carrying out wind resistance control on the catwalk structure, the stiffening girder and the hoisting system in typhoon stage.
2. The method for constructing a suspension bridge of claim 1, wherein the wind-resistant system comprises wind-resistant cables arranged on two sides of the catwalk structure and a suspender connecting the wind-resistant cables with the catwalk surface layer.
3. The method for constructing a suspension bridge according to claim 2, wherein the wind-resistant cable is subjected to tensioning treatment in advance.
4. The method for constructing a suspension bridge according to claim 1, wherein the stiffening girder is provided with an acceleration sensor and a displacement sensor.
5. The method for constructing a suspension bridge according to claim 1, wherein the hoisting system comprises a cable crane and a floating crane vessel for hoisting the stiffening girder in stages.
6. The wind-resistant mode for construction of the suspension bridge according to claim 1, wherein the construction simulation test device comprises a wind tunnel laboratory and a full-bridge aeroelastic model arranged in the wind tunnel laboratory, and the full-bridge aeroelastic model is used for simulating bridge states of different construction assembly rate stages so as to perform wind-resistant simulation tests.
7. The method for constructing a suspension bridge according to claim 1, wherein the control means is embodied in a catwalk structure by at least one of a wind-resistant cable system, a wind-resistant door frame, a transverse overpass, a vertical vibration-suppressing cable or a horizontal vibration-suppressing cable.
8. The method for constructing a suspension bridge according to claim 1, wherein the control means is implemented on the stiffening girder by reasonably adjusting the stiffening girder erection sequence, an alternative asymmetric erection sequence method, an eccentric mass method, a cross cable arranged between adjacent girder segments, or a pneumatic additive for improving the flutter critical wind speed.
9. The method for constructing a suspension bridge according to claim 1, wherein the control means is embodied in a hoisting system by pneumatically plugging the stiffening girder sections in hoisting to increase the torsional vibration critical wind speed.
10. The method for constructing a suspension bridge as claimed in claim 1, wherein the control means further comprises optimizing the construction organization scheme based on the test results of the construction simulation test device to reasonably arrange the construction period.

Description

Wind-resistant mode for bridge construction of suspension bridge Technical Field The invention particularly relates to the technical field of bridge engineering, in particular to an anti-wind mode for bridge construction of a suspension bridge. Background The suspension bridge uses suspension ropes as main bearing structures, and comprises a flexible suspension system formed by main cables, stiffening girders, main towers, saddles, anchors, slings and other components, wherein the lane stiffening girders are suspended on the drooping main cables through vertical or inclined slings. With the progress of modern bridge construction technology, the span of a suspension bridge is increasingly increased. With the increase of the span, the high span ratio of the stiffening girder is reduced, so that the rigidity is reduced, and the suspension bridge becomes more flexible, therefore, under the action of external load, the suspension bridge is easy to deform and vibrate, the dynamic stability problem of the suspension bridge is more remarkable compared with other bridge types, the static and dynamic effects and stability of wind load must be considered in design, and the dynamic wind resistance stability requirement is higher. The prior art mainly aims at researching the wind resistance of single components in the bridge formation state or construction stage of a suspension bridge, such as catwalk and main cable, and lacks research on wind-induced vibration mechanisms and systematic control methods in the whole construction process (including assembly, hoisting and system conversion). Therefore, the prior art fails to effectively solve the problems of vibration mechanism revealing and systematic control in the whole construction process of the typhoon stage of the suspension bridge, namely, the large-span suspension bridge is easy to generate wind-induced vibration in the construction process of the typhoon stage due to complex structural system conversion, low rigidity and low frequency, and seriously threatens the construction safety, so that a wind resistance analysis method capable of comprehensively considering the dynamic characteristics of the whole construction process, the typhoon time-varying wind field and the multi-working condition coupling effect is needed. Disclosure of Invention The method aims at solving the problems that in the prior art, systematic design of an anti-wind system for the whole bridge construction process is lacking, the anti-wind performance of a catwalk structure, a stiffening girder and a hoisting system cannot be effectively combined to be optimized, wind load response is not accurately analyzed through a construction simulation test, the anti-wind safety in the construction period is insufficient, and a construction organization scheme is difficult to optimize. In order to achieve the above purpose, the present invention adopts the following technical scheme: The wind-resistant mode for the construction of the suspension bridge utilizes a catwalk structure, a hoisting system, a stiffening girder, a construction simulation test device and control measures to classify wind resistance; the catwalk structure is arranged in the bridge construction area and comprises an anti-wind system; The stiffening beam is arranged above the catwalk structure, and the stiffening beam performs dynamic characteristic analysis in the construction process so as to control vibration; the hoisting system is connected with the catwalk structure and the stiffening beam and is used for hoisting the stiffening beam, and the hoisting system carries out wind-induced vibration response research on the stiffening beam section in the hoisting process in typhoon period; The construction simulation test device is used for carrying out wind resistance simulation test on the whole construction process of the stiffening girder so as to determine wind load response in the construction process; The control measures are arranged in the catwalk structure, the stiffening girder and the hoisting system and are used for carrying out wind resistance control on the catwalk structure, the stiffening girder and the hoisting system in typhoon stage. Further, the wind-resistant system comprises wind-resistant cables arranged on two sides of the catwalk structure and a suspender connected with the wind-resistant cables and the catwalk surface layer. On the basis of the scheme, the wind-resistant cable is required to be stretched in advance. As a still further scheme of the invention, the stiffening girder is provided with an acceleration sensor and a displacement sensor. Further, the hoisting system comprises a cable crane and a floating crane ship and is used for hoisting the stiffening girder in stages. On the basis of the scheme, the construction simulation test device comprises a wind tunnel laboratory and a full-bridge aeroelastic model arranged in the wind tunnel laboratory, wherein the full-bridge aeroelastic model is used