A Method for Determining the Tension Amount of Active Cable Prestress in a Tensioned Integral Structure
A technique of tensioning the overall structure and determining method, applied in special data processing applications, instruments, design optimization/simulation, etc. Effect
Active Publication Date: 2022-02-11
SOUTHEAST UNIV
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[0004] Purpose of the invention: The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for determining the prestressed tension of active cables in a tensioned integral structure, so as to solve the problems of complicated calculation process and inconsistent tension in the prior art
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[0024] The technical solutions of the present invention will be described in detail below, but the protection scope of the present invention is not limited to the embodiments.
[0025] Such as figure 1 As shown in , a method for determining the prestressed tension of active cables for overall tensioned structures, taking a carbon fiber cable dome model with a diameter of 5.4 meters as an example, as shown in figure 2 , 3 shown. figure 2 is the plan view of the carbon fiber cable dome, where 1, 2 and 3 denote the inner ring, middle ring and outer ring cable respectively, ① to They are axes 1 to 12 respectively, and the outermost ring A is the outer ring beam. image 3 It is the elevation view of the carbon fiber cable dome, the numbers in the figure are the dimensions of each part, and the Chinese characters are the names of the cables or rods.
[0026] This embodiment only illustrates the method for determining the tension in one of the tension stages, and the determina...
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The invention provides a method for determining the prestressed tension amount of active cables of a tensioned integral structure. The invention proposes the concept of the tension influence coefficient η of the active cable, and provides the calculation formula of the tension influence coefficient. The tension of the prestressed cable force in the structural design target state is graded. In each tension stage, the tension of each active cable is the target change of the active cable multiplied by the tension influence coefficient proposed by the present invention. The final prestressed cable force target state of the structure is defined as vector {F}, and the cable force vector obtained after the last step of tension is {F} m ′, calculation error {μF}={F}‑{F} m ’, if the calculated error does not meet the owner’s needs or meet the specification requirements, supplementary tensioning is performed, and the tensioning vector {T}’ of the supplementary tensioning is also multiplied by the tensioning influence coefficient η. The tension influence coefficient proposed by the invention can quickly calculate the tension amount of the active cable to tension the active cable, the calculation is simple and convenient, and the precision is also high.
Description
technical field [0001] The invention relates to a tensioned integral structure, in particular to a method for determining the prestressed tension amount of an active cable. Background technique [0002] The isotonic integral structure of the cable dome structure is a flexible structure composed of cables and compression rods. The rigidity is formed by the prestress of the cables and the compression rods, and the transition from the mechanism state to the structural state is completed by applying prestress to the active cables in the tension cable dome, that is, the internal force and geometric configuration of the structure are achieved by tensioning the cables. The design state is the target state. When the geometry and cross-sectional dimensions of the cable dome structure have been determined, the tension amount (tension force or tension displacement) of the active tension cable required by different tension schemes is different, resulting in the prestressed state of the...
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IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/06
Inventor 秦卫红惠卓黄振涛李云杰张兆昌张同庆许剑武
Owner SOUTHEAST UNIV