arrow_back_ios

Main Menu

See All Acoustic End-of-Line Test Systems See All DAQ and instruments See All Electroacoustics See All Software See All Transducers See All Vibration Testing Equipment See All Academy See All Resource Center See All Applications See All Industries See All Insights See All Services See All Support See All Our Business See All Our History See All Our Sustainability Commitment See All Global Presence
arrow_back_ios

Main Menu

See All Actuators See All Combustion Engines See All Durability See All eDrive See All Production Testing Sensors See All Transmission & Gearboxes See All Turbo Charger See All DAQ Systems See All High Precision and Calibration Systems See All Industrial electronics See All Power Analyser See All S&V Hand-held devices See All S&V Signal conditioner See All Test Solutions See All DAQ Software See All Drivers & API See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All Utility See All Vibration Control See All Acoustic See All Current / voltage See All Displacement See All Load Cells See All Pressure See All Strain Gauges See All Torque See All Vibration See All LDS Shaker Systems See All Power Amplifiers See All Vibration Controllers See All Accessories for Vibration Testing Equipment See All Training Courses See All Articles See All Acoustics See All Asset & Process Monitoring See All Custom Sensors See All Data Acquisition & Analysis See All Durability & Fatigue See All Electric Power Testing See All NVH See All Reliability See All Smart Sensors See All Vibration See All Weighing See All Automotive & Ground Transportation See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Release Notes See All Compliance See All Our People
arrow_back_ios

Main Menu

See All CANHEAD See All GenHS See All LAN-XI See All MGCplus See All Optical Interrogators See All QuantumX See All SomatXR See All Accessories See All Accessories See All BK Connect / Pulse See All API See All Microphone Sets See All Microphone Cartridges See All Acoustic Calibrators See All Special Microphones See All Microphone Pre-amplifiers See All Sound Sources See All Accessories for acoustic transducers See All Experimental testing See All Transducer Manufacturing (OEM) See All Accessories See All Non-rotating (calibration) See All Rotating See All CCLD (IEPE) accelerometers See All Charge Accelerometers See All Impulse hammers / impedance heads See All Cables See All Accessories See All Electroacoustics See All Noise Source Identification See All Environmental Noise See All Sound Power and Sound Pressure See All Noise Certification See All Industrial Process Control See All Structural Health Monitoring See All Electrical Devices Testing See All Electrical Systems Testing See All Grid Testing See All High-Voltage Testing See All Vibration Testing with Electrodynamic Shakers See All Structural Dynamics See All Machine Analysis and Diagnostics See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All On-Site Calibration See All Resources See All Software License Management

UPC: Tests for externally reinforced concrete beams

universitat politècnica de catalunya, spain

Introduction

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.

chevron_left
chevron_right

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:

  • Removal of a concrete roof
  • Removal of the end laminate interfacial
  • Detachment of the laminate interfacial induced by the fracture
  • Shear failure in concrete

Tests with 24 strain gages

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.

Signal capturing with MGCplus

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 UPC

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

Technology Used

Related Case Studies

No more result to load