Support is a very important structural component, mainly used in bridge structures. There are many types of bearings, such as commonly used seismic isolation bearings, spherical bearings, plate bearings, basin bearings, etc. The testing items and standard basis for different types of bearings are also different. Below, Zhongjiao Road and Bridge Technology will take you to understand together. Seismic isolation bearings 1. Testing standards: 1. National standard series: (1) GB/T20688.1-2007 "Rubber bearings - Part 1: Test methods for seismic isolation rubber bearings" (2) GB/T20688.2-2006 "Rubber bearings - Part 2: Bridge seismic isolation rubber bearings" (3) GB/T20688.3-2006 "Rubber bearings - Part 3: Building seismic isolation rubber bearings" 2. Traffic series (1) JT/T822-2011 "Lead core seismic isolation rubber bearings for highway bridges" (2) JT/T842-2012 High damping isolation rubber bearings for highway bridges "(3) JT/T852-2013" Friction pendulum vibration reduction and isolation bearings for highway bridges "II. Inspection items: appearance quality, size, compression performance, shear performance, tensile performance, durability, low speed deformation reaction performance. Spherical bearings 1. Inspection standard: GB/T17955-2009 "Bridge spherical bearings" 2. Inspection items: appearance quality, size, vertical bearing capacity, horizontal bearing capacity, friction coefficient, rotational performance, non-destructive testing. Pot bearings 1. Inspection standard: JT/T391-2019 "Pot bearings for highway bridges" 2. Inspection items: appearance quality, size, vertical bearing capacity, horizontal bearing capacity, friction coefficient, corner angle, non-destructive testing. Plate type bearings 1. Testing standard: JT/T4-2019 "Road Bridge Plate Rubber Bearings" 2. Testing items: Ordinary plate type bearings: external dimensions, appearance quality, internal quality, compressive modulus of elasticity, shear modulus of elasticity, shear adhesion, ultimate compressive strength, allowable rotation angle, shear aging resistance. Sliding plate support: external dimensions, appearance quality, internal quality, compressive elastic modulus, ultimate compressive strength, allowable rotation angle, friction coefficient between PTFE plate and stainless steel plate
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China