A method for determining the prestress tensioning amount of an active cable of a tensioned monolithic structure
A technique of tensioning the overall structure and determining method, applied in special data processing applications, instruments, electrical and digital data processing, etc. Effect
Active Publication Date: 2019-01-11
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 prestress stretching amount of an active cable of a tensioned monolithic structure. The invention proposes the concept of the tensioning influence coefficient eta of the active cable, and gives the calculation formula of the tensioning influence coefficient. The tensioning of the prestressed cable force in the design target state of the structureis classified, and in each tensioning stage, the tensioning amount of each active cable is the target change amount of the active cable multiplied by the tensioning influence coefficient proposed bythe invention. The final prestressed cable force target state of the structure is defined as vector {F}, the cable force vector obtained after the last tensioning step is {F} m ', and the calculationerror is {[mu]F} = {F}-{F} m '; if the error calculated does not meet the needs of the owner or does not meet the requirements of the specifications, supplementary tensioning is performed and the tensioning vector {T}' of the tensioning is also multiplied by the tensioning influence coefficient eta. The tensioning influence coefficient provided by the invention can quickly calculate the tensioningamount 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): G06F17/50
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