Cable-stayed bridge modal transition test device and modal transition analysis method
A technology of test test and analysis method, applied in the field of cable-stayed bridge modal transition test test device, can solve problems such as wrong judgment, undeveloped test device, etc., and achieve the effect of convenient adjustment of working conditions
Active Publication Date: 2022-08-05
河南中桥桥梁科技有限公司
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Problems solved by technology
After the structural mode transition, there is no one-to-one correspondence between the mode shape and the frequency, and when the dynamic damage identification index obtained by the mode shape is used for structural damage detection, there will be erroneous judgments
At the same time, in the field of civil engineering, especially in the structure of long-span cable-stayed bridges, the research on the modal jump phenomenon is limited, and what kind of impact and consequences it will have on the structure has not yet been fully understood and paid enough attention to. device has not yet been developed
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[0048] The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes Such changes are obvious within the spirit and scope of the present invention as defined and determined by the appended claims, and all inventions and creations utilizing the inventive concept are within the scope of protection.
[0049] like figure 1 As shown, a cable-stayed bridge modal transition test test device includes a base 1, a bridge tower 2 is vertically arranged on the base 1, a main beam 3 is arranged on the bridge tower 2, and a number of sliding slides are slidably arranged on the main beam 3. Block 5, the top of the bridge tower 2 is connected with several cables 4, the upper end of the cable 4 and the top of the bridge tower 2 are detachably connect...
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The invention discloses a cable-stayed bridge modal transition test device and a modal transition analysis method, and relates to the technical field of bridge dynamic analysis and test. Comprising a base, a bridge tower is vertically arranged on the base, a main beam is arranged on the bridge tower, a plurality of sliding blocks are arranged on the main beam in a sliding mode, a plurality of inhaul cables are connected to the top end of the bridge tower, the upper ends of the inhaul cables are detachably connected with the top end of the bridge tower, and the lower ends of the inhaul cables penetrate through the sliding blocks to be detachably connected with balancing weights. The laser displacement meter is used for measuring the dynamic displacement of the main beam, the bridge tower and the inhaul cable and is connected with a dynamic data acquisition system. By arranging the balancing weight at the movable end of the inhaul cable, after the internal force of all the inhaul cables needing to be assembled meets the requirement, the connecting positions of the inhaul cables and the main beam are marked, then all the inhaul cables are connected with the main beam, it is guaranteed that the internal force of the inhaul cables is consistent with the design value, and meanwhile the tedious cable adjusting process is omitted. And the modal transition phenomenon of the cable-stayed bridge can be conveniently researched.
Description
technical field [0001] The invention relates to the technical field of bridge dynamic analysis and testing, in particular to a modal transition test device and a modal transition analysis method of a cable-stayed bridge. Background technique [0002] The development of modern cable-stayed bridges is one of the proudest achievements of bridge engineers. In a sense, the detuning of its structural parameters is inevitable. The so-called "detuning" here is a professional term derived from periodic or symmetrical structural vibration analysis, which refers to the deviation between actual parameters and design parameters caused by structural damage, material performance aging, installation errors, etc., which corresponds to structural parameter changes. For example, in a long-span cable-stayed bridge structure, the tension error, anchoring loss, wire stress relaxation, and measurement error of cable force during cable construction will cause the actual cable force to deviate from...
Claims
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IPC IPC(8): G01M7/02
CPCG01M7/02G01M7/025Y02T90/00
Inventor刘占辉李永乐沈锐利向活跃唐浩俊李泽腾卢治谋刘琦熊思哲甄祎梦
Owner河南中桥桥梁科技有限公司