변형률
변형률 게이지(변형계)는 더 우수하고 안전한 제품을 만들기 위해 재료의 피로도를 측정하고 시험하는 데 있어 핵심적인 도구입니다. 구조적 내구성 테스트,구조 상태 모니터링, 또는 OEM 트랜스듀서 생산을 위해, HBK의 광학 및 전기 스트레인 게이지를 첫 번째로 선택해야합니다.
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The structural research team at the Universitat Politècnica de Catalunya (UPC), Barcelona, Spain, has developed tests to determine the stresses in concrete beams that are used in construction.
The structural research team at the Universitat Politècnica de Catalunya (UPC), Barcelona, Spain, has developed tests to determine the stresses in concrete beams that are used in construction. The tests, that have taken the past two years to develop, focus on the use of externally reinforced carbon fiber laminate to reinforce the concrete beams. The use of carbon fiber laminates (CFRP) has increased over the past several years. CFRP characteristically has its fibers running in one direction to provide a semi-rigid structure with high modulus when bonded with an epoxy adhesive. The laboratory tests were undertaken to simulate various types of failures that can commonly occur. These include:
The tests undertaken by the Laboratori per a la Innovació Tecnològica d'Estructures i Materials (LITEM) involved fitting the beams with 24strain gages of type 1-LY41-6/350. These were pasted in position using HBK adhesive X280. Strain gages were placed under the beam and along the CFRP strips with two at each side on position L/4 for linear displacement. In addition two laser sensors were placed – one on either side at the center of the beam – for triangulation displacement measurements.
The signals were captured using HBK’s MGCplus with three AP815i modules for the strain gages while an AP801 module was used for the laser sensors. Load and displacement signals were detected by a 250 kN actuator. HBK’s catman®APdata acquisition software was used to analyze the results. Traditional beam theory was used to calculate the reinforced beam bending forces and these were subsequently compared with the data obtained from the tests. This enabled the general equation for doubly-reinforced concrete beams and beams reinforced with external laminates such as fiber-reinforced polymers to be modified to give more accurate estimations for deformationεdb (deformation blast-off). Future tests may also utilize gages attached to the laminated embedded on the tension face of beams.
The Universitat Politècnica de Catalunya · BarcelonaTech (UPC) is a public institution of research and higher education in the fields of engineering, architecture, sciences and technology, and one of the leading technical universities in Europe. Every year, close to 6,000 bachelor’s and master’s students, more than 300 doctoral students and 1,600 continuing education students graduate. The UPC has a high graduate employment rate: 95% of its graduates are in work and 88% find a job in under three months. It is ranked in the main international rankings.
More information about BarcelonaTech University
변형률 게이지(변형계)는 더 우수하고 안전한 제품을 만들기 위해 재료의 피로도를 측정하고 시험하는 데 있어 핵심적인 도구입니다. 구조적 내구성 테스트,구조 상태 모니터링, 또는 OEM 트랜스듀서 생산을 위해, HBK의 광학 및 전기 스트레인 게이지를 첫 번째로 선택해야합니다.
교정, 재료 또는 피로 테스트 여부에 관계없이 MGCplus 데이터 수집 시스템은 모든 종류의 애플리케이션에서 사용됩니다. 변형, 힘, 변위, 토크, 전압, 전류, 온도 및 기타 많은 매개변수에 대한 데이터를 수집합니다. 이러한 다재다능성 덕분에 MGCplus는 전 세계에서 가장 인기 있는 데이터 수집 시스템 중 하나입니다.
