High-Resilient Bearings Efficient vibration insulation in minimal space

Transcription

1 High-Resilient Bearings Efficient vibration insulation in minimal space

2 Applications and advantages of high-resilient bearings Efficient supporting of heavy weights Getzner Werkstoffe has developed a new product to simplify elastic supporting of heavy loads in situations with design constraints. The high-resilient bearings isolate vibrations and concussions in structures extremely efficiently, even while taking up minimal space. Many buildings, such as high-rises, must be supported on elastic bearings in order to efficiently protect them from vibrations and concussions. High-resilient elastic bearings are also required for structures in which high loads meet very small areas, such as for crane installations, steel structures and heavy machinery. However, high loads typically also require large bearing surfaces over which the weight can be evenly distributed. In many cases, such large surfaces are not available due to design constraints. The high-resilient bearings from Getzner offer high performance, particularly with small support surfaces. Asmall bearing point is sufficient to efficiently support very high loads on the material. This allows an elastic bearing to provide optimal performance even under limited space conditions. Point as well as strip bearings are possible. This flexibility eliminates the need for expensive structural alterations, simplifying realization of the building and positively impacting the total costs. Even during a renovation or subsequent work, optimal results can be achieved with the installation of high-resilient bearings. The easy handling of these bearings is particularly evident on the construction site. They are relatively light, can be positioned without effort and even readjusted later. The highload bearings from Getzner can be Product advantages High load decoupling with bearings in minimal space No expensive structural alterations required Simple handling and processing Minimized total costs altered on the construction site without difficulty and also impress with maximum efficiency and quality as well as uncomplicated handling. The high dynamic efficiency of the material guarantees outstanding vibration insulation. These elastic bearings also have low heights and are easy to work with. A high-resilient bearing from Getzner Werkstoffe can support a comparable load of roughly 6 tons on an area of one square meter.

3 Complete vibration insulation from a single source Comprehensive service, engineering know-how Combining Getzner standard materials with high-resilient bearings produces an optimal project-specific solution, depending on the structural requirements. Customers profit from the comprehensive Getzner service and the proven quality of the materials. Many reference installations confirm that the solutions for shockproofing and vibration insulation stand the test in practice. Individually tailored services Getzner works closely with customers to solve vibration-related problems, always focusing on the specific project requirements. The preliminary calculation of the deflection, natural frequency and degree of isolation form the basis for the material selection consulting. These components are critical for the success of the project. Getzner manufactures the materials to specification, if required, to ensure that they can be installed quickly and easily. If desired, the company will also take over local construction site management, organization of the installation work and creation of individual installation plans. Product properties High dynamic efficiency High load capacity: Up to 6 N/mm2 Long service life Best long-term creep resistance Low amplitude dependence Low frequency dependence Relatively low weight Low flammability Resistant to chemicals and oils High mechanical strength (tensile strength, elongation at break) Specially selected stiffness values for various load requirements Usable as point or strip bearing

4 Successful projects speak for themselves Over 4 years of experience with vibration insulation resulted in the development of the Getzner high-resilient bearings. Getzner Werkstoffe offers builders, architects and other construction professionals a mature product that is ready to handle the challenges of real-world constructions. Getzner develops elastic solutions for vibration insulation for railway, construction and industrial applications. The PUR materials are the result of in-house research and development. The company s competence is founded on years of experience and expertise. Many complex and successfully implemented projects have made Getzner a leading provider of vibration reduction solutions in the construction industry. Information required to use the high-load bearings Drawings (horizontal projection, crosssections, details, etc.) Dead load, live load (people) Bearing position Bearing dimensions (length, width, height) Excitation frequency Target natural frequency Maximum deflection amount References Beisheim Centre Ritz-Carlton, Berlin Biogen Institute, Boston National Training Centre, Tokyo Lufthansa Headquarters, Frankfurt Kirloskar Oil Engines, Kagal EADS, Manching site Kahoku Shimpo, Sendai Theatro National de Catalunya, Barcelona The National Opera, Oslo Drachen-Centre, Basel Skyline, Vienna The Rushmore Building, NYC Music Centre, Helsinki TB HRB en Copyright by Getzner Werkstoffe GmbH -2 Austria Bürs germany Berlin Munich Jordan Amman Japan Tokyo INDIA Pune CHINA Beijing

5 High Resilient Bearing HRB-HS Material Colour closed cellular polyetherurethane dark-green Standard dimensions on stock Thickness: 2.5 mm with HRB-HS mm with HRB-HS 25 Dimensions: max.5 m wide, up to.2 m long Other dimensions (also thickness), as well as stamped on request. Area of application Compression load Deflection depending on form factor, values apply to form factor Static range of use (static loads) Load peaks (short term, infrequent loads) up to. N/mm 2 up to 4.5 N/mm 2 approx. 2 % approx. 6 % Material properties Test methods Comment Mechanical loss factor.6 DIN 55* depending on frequency, specific load and amplitude Static shear modulus 2.4 N/mm 2 DIN ISO 827* at preload of N/mm 2 Dynamic shear modulus 2.8 N/mm 2 DIN ISO 827* at preload of N/mm 2, Hz Coefficient of friction (steel).6 Getzner Werkstoffe dry, reference value Coefficient of friction (concrete).7 Getzner Werkstoffe dry, reference value Compression set < 5 % DIN EN ISO %, 2 C, 7 h, min. after unloading Operating temperature - bis 5 C short term higher temperatures possible Flammability B2 DIN 42 EN ISO normal flammable passed Thermal conductivity.6 W/(mK) DIN EN 2667 * Tests according to respective standards All information and data is based on our current knowledge. The data can be applied for calculations and as guidelines, are subject to typical manufacturing tolerances and are not guaranteed. We reserve the right to amend the data. Further information can be found in VDI Guideline 262 (Association of German Engineers). Further characteristic values on request.

6 Load deflection curve mm 7.5 mm 25 mm 5 mm Figure : Quasistatic load deflection curve measured with a loading rate of.2 N/mm 2 /s Testing between abrasive paper (grain size K2) affixed to flat steelplates; recording of the rd loading; testing at room temperature Deflection [mm] 7 Modulus of elasticity Modulus of elasticity [N/mm 2 ] Hz Hz Quasistatic Figure 2: Load dependency of the static and dynamic modulus of elasticity Quasistatic modulus of elasticity as a tangent modulus taken from the load deflection curve; dynamic modulus of elasticity due to sinusoidal excitation with an amplitude of. mm Test according to DIN Natural frequency mm 7.5 mm 25 mm 2.5 mm Figure : Natural frequency of a single-degree-of-freedom system (SDOF system) consisting of a fixed mass and an elastic bearing HRB-HS based on a stiff subgrade;.5 Parameter: Thickness of elastomeric bearing Natural frequency [Hz] 2

7 Static creep behaviour Relative deflection [% of thickness with unstressed sample] 8 % 6 % 4 % 2 % % 8 % 6 % 4 % 2 % Full static loading Half static loading Month Year Years Figure 4: Deformation under consistent loading If HRB-HS is loaded within the specified operating range, the performance (natural frequency) under constant ambient conditions remain the same during the period of loading. % ,, Period of loading [days] Dependency on amplitude Change of dynamic modulus of elasticity [%] 5 % 4 % % 2 % % % Reference value. mm, Hz Figure 5: Typical dependency of the dynamic modulus of elasticity on the amplitude of vibration HRB-HS materials exhibit a negligible dependency of amplitude. - % -2 % - % -4 % -5 % Amplitude [mm]

8 Influence of the form factor In the figures below one can find correction varying form factors. Figure 6: Static load range Figure 7: Deflection* Variation of deflection [%] % 8 % 6 % 4 % 2 % %. -2 %. Figure 8: Dynamic modulus of elasticity at Hz* Figure 9: Natural frequency* Variaton of the dynamic modulus of elasticity [%] % 2 % % % - % -2 % - % -4 % -5 %. * Reference value; specific load. N/mm 2, form factor Variation of natural frequency [%] 5 % % 5 % % -5 % - % -5 % -2 % -25 % - %. DB HRB-HS en Copyright by Getzner Werkstoffe GmbH l -2 We reserve the right to amend the data. Austria Bürs germany Berlin Munich Jordan Amman Japan Tokyo INDIA Pune CHINA Beijing 4

9 High Resilient Bearing HRB-HS 6 Material Colour closed cellular polyetherurethane dark-blue Standard dimensions on stock Thickness: 2.5 mm with HRB-HS mm with HRB-HS 6 25 Dimensions: max.5 m wide, up to.2 m long Other dimensions (also thickness), as well as stamped on request. Area of application Compression load Deflection depending on form factor, values apply to form factor Static range of use (static loads) Load peaks (short term, infrequent loads) up to 6. N/mm 2 up to 9. N/mm 2 approx. 2 % approx. 5 % Material properties Test methods Comment Mechanical loss factor.7 DIN 55* depending on frequency, specific load and amplitude Static shear modulus.5 N/mm 2 DIN ISO 827* at preload of 6 N/mm 2 Dynamic shear modulus 4.2 N/mm 2 DIN ISO 827* at preload of 6 N/mm 2, Hz Coefficient of friction (steel).6 Getzner Werkstoffe dry, reference value Coefficient of friction (concrete).7 Getzner Werkstoffe dry, reference value Compression set < 5 % DIN EN ISO %, 2 C, 7 h, min. after unloading Operating temperature - bis 5 C short term higher temperatures possible Flammability B2 DIN 42 EN ISO normal flammable passed Thermal conductivity.7 W/(mK) DIN EN 2667 * Tests according to respective standards All information and data is based on our current knowledge. The data can be applied for calculations and as guidelines, are subject to typical manufacturing tolerances and are not guaranteed. We reserve the right to amend the data. Further information can be found in VDI Guideline 262 (Association of German Engineers). Further characteristic values on request.

10 Load deflection curve mm 25 mm 7.5 mm 5 mm Figure : Quasistatic load deflection curve measured with a loading rate of.4 N/mm 2 /s Testing between abrasive paper (grain size K2) affixed to flat steelplates; recording of the rd loading; testing at room temperature Deflection [mm] Modulus of elasticity Modulus of elasticity [N/mm 2 ] Hz Hz Quasistatic Figure 2: Load dependency of the static and dynamic modulus of elasticity Quasistatic modulus of elasticity as a tangent modulus taken from the load deflection curve; dynamic modulus of elasticity due to sinusoidal excitation with an amplitude of. mm Test according to DIN Natural frequency mm 7.5 mm 25 mm 2.5 mm Figure : Natural frequency of a single-degree-of-freedom system (SDOF system) consisting of a fixed mass and an elastic bearing HRB-HS 6 based on a stiff subgrade; 2 Parameter: Thickness of elastomeric bearing Natural frequency [Hz] 2

11 Static creep behaviour Relative deflection [% of thickness with unstressed sample] 8 % 6 % 4 % 2 % % 8 % 6 % 4 % 2 % Full static loading Half static loading Month Year Years Figure 4: Deformation under consistent loading If HRB-HS 6 is loaded within the specified operating range, the performance (natural frequency) under constant ambient conditions remain the same during the period of loading. % ,, Period of loading [days] Dependency on amplitude Change of dynamic modulus of elasticity [%] 5 % 4 % % 2 % % % Reference value. mm, Hz Figure 5: Typical dependency of the dynamic modulus of elasticity on the amplitude of vibration HRB-HS 6 materials exhibit a negligible dependency of amplitude. - % -2 % - % -4 % -5 % Amplitude [mm]

12 Influence of the form factor In the figures below one can find correction varying form factors. Figure 6: Static load range Figure 7: Deflection* 6 Variation of deflection [%] 8 % 6 % 4 % 2 % % 8 % 6 % 4 % 2 % %. -2 %. Figure 8: Dynamic modulus of elasticity at Hz* Figure 9: Natural frequency* Variation of the dynamic modulus of elasticity [%] 2 % % % - % -2 % - % -4 % -5 % -6 %. * Reference value; specific load 6. N/mm 2, form factor Variation of natural frequency [%] % 5 % % -5 % - % -5 % -2 % -25 % - %. DB HRB-HS 6 en Copyright by Getzner Werkstoffe GmbH l -2 We reserve the right to amend the data. Austria Bürs germany Berlin Munich Jordan Amman Japan Tokyo INDIA Pune CHINA Beijing 4