2 results about "Stress working" patented technology

The utility model belongs to bridge construction technical field, concretely relates to a bridge expansion joint auxiliary installation device, including stress working beam, adjusting screw subassembly, support plate subassembly and level gauge, stress working beam is set in the above of bridge expansion joint reserved slot transversely, stress working beam both ends are set on the bridge surface pavement layer of bridge reserved slot both sides, adjusting screw subassembly is connected with stress working beam, support plate subassembly is connected with adjusting screw subassembly, and level gauge is set on the surface of stress working beam, the auxiliary installation device passes through the synergies of stress working beam, adjusting screw subassembly, support plate subassembly and level gauge, has improved installation quality and efficiency significantly, has reduced labour intensity and safety risk, has brought the reduction of comprehensive cost and the promotion of bridge pavement long -term service performance more, has better economic benefit and practicality.

The application discloses a kind of laser measuring equipment and detection method based on processing of flame-retardant plate, it is related to laser measuring technical field, including support frame, acoustic detection device, flame-retardant plate lifting mechanism, laser detection mechanism.The application realizes the initiative stress excitation detection of the structural strength of flame-retardant plate by the two different working modes of flame-retardant plate lifting mechanism, mode one makes flame-retardant plate present the form of " two ends are raised, middle part is depressed " by double-side synchronous lifting, simulates the stress working condition when plate is subjected to uniform load or large-span support in actual application, to accurately evaluate its overall bending stiffness and elastic modulus;Mode two makes plate produce asymmetric distortion by the way of one-side lifting, the other side static resistance, two modes amplify hidden internal structure hidden danger through macroscopic physical deformation, so that strength detection is more comprehensive and has pertinence.