Force measurement tensioning device for steel structural stay rope

Abstract

The invention discloses a force measurement tensioning device for a steel structural stay rope. The force measurement tensioning device comprises an upper force application lever, a lower force application lever and a connecting rod, wherein the upper end of the connecting rod is hinged to the middle section of the upper force application lever, and the lower end of the connecting rod is hinged to the middle section of the lower force application lever; a bracing rod, a weighing sensor and a jack are connected between the rear end of the upper force application lever and the rear end of the lower force application lever in series. A distance between the front end force application point of the upper force application lever and a connecting rod upper hinge point on the upper force application lever is defined as a, a distance between the connecting rod upper hinge point on the upper force application lever and a bracing rod hinge point at the rear end of the upper force application lever is defined as b, and a / b = 1 / (1 / 3 - 3). Tensioning operation is convenient, tensioning force application is accurate and controllable, tensioning and test can be simultaneously carried out on the stay rope, and the coordinated installation construction of the stay rope steel structure is realized. The force measurement tensioning device is particularly suitable for the installation construction of various stay rope steel structures.

Description

technical field [0001] The invention relates to a tensioning device for a steel structure cable, in particular to an appliance for tensioning and measuring the force of a cable in a steel structure with a cable. Background technique [0002] In the steel structure system, the prestressed steel structure with cables is a steel frame system in which prestress is generated inside the structure by tensioning cables, and flexible cables are used as the main load-bearing member or auxiliary load-bearing member. The steel structure with cables resists the effect of external load through the axial stretching of the cables, which can make full use of the strength of the steel, adjust its dynamic performance, and improve the bearing capacity, rigidity and stability of the structure. Therefore, the steel structure with cables It is suitable for large-span, heavy-load and super-high-rise structures, and can better meet the functional requirements of buildings. Moreover, because the ...

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Problems solved by technology

The invention patent application "Testing method for the tension of cable steel strands of partial cable-stayed bridges (Application No.: 201010597084.3)" discloses a test method for the tension of the cables, which calculates the tension by testing the fundamental frequency and bending stiffness of the cables. Cable tension, these indirect measurement methods are to calculate the tension of the cable through other parameters, the test procedure is complicated, the test data is inaccurate, the test accuracy is not high, and it cannot accurately reflect the real axial internal force of the cable, especially in the cable In the state of small tension, the error value is larger, which has a serious impact on the stability and safety of the steel structure

[0005] Existing cable tensioning equipment and tension testing devices are all independently and separately for tensioning or testing the cables. Indirect test calculations cannot accurately reflect the internal tension of the steel cables, nor can they adjust and control the internal tension of the cables in real time and conveniently.

These cable tensioning devices are inconvenient for cable tensioning installation and operation for single tension structures, and the tension force is inaccurate; and for tensioned integral structures such as cable domes or tensegrity networks, because each root in this type of structure There are strict design requirements for the tensioning sequence of the cables, the magnitude of the tension force, and the relationship between the tension forces. The existing tensioning equipment is difficult to accurately control and adjust the internal tension of the cables, and it is impossible to coordinate the installation of the steel structure. Construction, and then have many adverse effects on the overall structure

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