A Rapid Detection Method of Ultimate Shear Strain of Rubber Bearing

Abstract

A rapid detection method for the ultimate shear strain of a rubber bearing, including the following steps: (1) Making a sample: take a piece of "L"-shaped rubber, a piece of steel plate, and an adhesive of the same material as the rubber bearing, " The length of the L-shaped rubber facade is L1, and the bottom surface of the "L"-shaped rubber is bonded to the steel plate as a whole by vulcanization bonding; (2) 900 tensile peeling of the sample: put the above sample into The 900° stretching and peeling machine is used to obtain the elongated length L2 of the "L"-shaped rubber facade when the sample is damaged, that is, when the rubber is broken or the rubber is peeled off from the steel plate; (3) Data processing: the rubber deformation L2-L1 , the total rubber thickness Tr of the rubber bearing and the thickness Hb of the rubber bearing under the ultimate shear vertical pressure are input into the computer, and the computer obtains the ultimate shear strain γu according to the pre-designed calculation software. The detection method can shorten the detection period, reduce the detection cost and the safety hazard in the detection process.

Description

technical field [0001] The invention relates to the technical fields of bridge engineering and construction engineering, in particular to a rapid detection method for the ultimate shear strain of a rubber bearing. Background technique [0002] Rubber bearings are widely used in bridge engineering, construction engineering, nuclear power equipment and large-scale mechanical equipment for shock absorption and isolation applications. In order to ensure that the shock absorption and isolation effects of rubber bearings can meet the safety requirements of structural design, the ultimate shear of rubber bearings Strain has clear testing standard requirements. [0003] At present, in the standard, the testing method for the ultimate shear strain of rubber bearings is to use full-scale or scaled-scale model rubber bearings for shear failure. The specific process is as follows: figure 1 with figure 2 As shown, use a compression shear testing machine to apply a certain pressure (P)...

AI Technical Summary

Problems solved by technology

[0005] 1. For each test, it is necessary to install and disassemble the test tooling (testing machine) and the test support. The test process is cumbersome and takes a long time. In addition, the most important thing is that after the ultimate shear damage to the rubber support, the support It is scrapped and loses its use value. Each inspection of a rubber bearing consumes a cost, and the inspection cost is high;

[0006] 2. The detection process is very dangerous; due to the need to continuously apply shear stress (Q) to the test support in the horizontal direction, after the support is damaged, the applied shear stress cannot be stopped immediately due to inertia, which is easy to damage the detection equipment or cause a safety accident

Images