Detail of GB/T 30827-2014

Introduction of GB/T 30827-2014

1 Scope This standard specifies the terms and definitions, symbols and interpretations, components and materials, technical requirements, inspection rules, marking, packaging, transport and storage, inspection and monitoring of external prestressing tendons (hereinafter referred to as external tendon). This standard is applicable to newly-built prestressed concrete girder bridge structures. Reference may be made to this standard for the external tendons used for maintenance and reinforcement of existing bridge structures and for other structures. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 175 Common portland cement GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test method (Scales A, B, C, D, E, F, G, H, K, N, T) GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method GB/T 254 Semi-refined paraffin wax GB/T 700 Carbon structural steels GB/T 1591 High strength low alloy structural steels GB/T 5224 Steel strand for prestressed concrete GB/T 5796.1 Trapezoidal screw threads - Part 1: Profiles GB/T 5796.2 Trapezoidal screw threads - Part 2: System of diameter and pitch GB/T 5796.3 Trapezoidal screw threads - Part 3: Basic dimensions GB/T 5796.4 Trapezoidal screw threads - Part 4: Tolerances GB/T 6402-2008 Steel forgings - Method for ultrasonic testing GB/T 8162 Seamless steel tubes for structural purposes GB/T 11352 Carbon steel castings for general engineering purpose GB/T 14370 Anchorage, grip and coupler for prestressing tendons GB/T 18365 Technical conditions for hot-extruding PE protection high strength wire cable of cable-stayed bridge GB/T 21073 Epoxy-coated seven-wire prestressing steel strand GB/T 21839-2008 Steel for prestressed concrete - Test methods GB/T 25823-2010 Individual epoxy-coated wire prestressing steel strand GB 50204 Code for acceptance of constructional quality of concrete structures GBJ 132 Basic terms and general symbols of structure deign CJ/T 297 High density polyethylene sheathing compounds for bridge cable JB/T 4730.4 Nondestructive testing of pressure equipments - Part 4: Magnetic particle testing JB/T 5000.13 Heavy mechanical general techniques and standards - Part 13: Packing JG 161 Unbonded prestressing steel strand JG/T 3007 Corrosion-resistant and lubricating grease specialized for unbonded tendons JG/T 5028 Hydraulic jack for prestressing JG/T 5029 Electric oil pump for pretressing JGJ 63 Standard of water for concrete YB/T 152 High strength low relaxation hot-dip galvanized Steel strand for prestress 3 Terms and definitions For the purposes of this document, the terms and definitions given in GBJ 132 and the following apply. 3.1 external prestressing tendon components assembly of external prestressing tendon, anchorage device, deviator, damper, etc. 3.2 external prestressing tendon combination of external tensile elements of tendon and its corrosion prevention and protection 3.3 external tensile elements of tendon steel strand outside the section of a member that is prestressed 3.4 deviator device that changes the direction of transmission of force in a prestressing tendon so as to let the external tensile elements of tendon deviate in a centralized way 3.5 damper device for reducing vibration amplitude of external prestressing tendon and changing natural vibration frequency of external prestressing tendon to avoid resonance with structure 3.6 duct protective sleeve that is externally wrapped or sleeved on external tensile elements of tendon to prevent corrosion and mechanical damage of the external tensile elements of tendon

Contents of GB/T 30827-2014

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols and interpretations 5 Components and materials 5.1 General requirements 5.2 External prestressing tendon 5.3 Deviator 5.4 Anchorage devices 5.5 Damper 5.6 Accessories 6 Technical requirements 6.1 General requirements 6.2 Corrosion protection performance 6.3 Anchoring performance of anchorage device 6.4 Under-anchor load transfer performancecc 6.5 Fatigue performance of external prestressing tendon components 6.6 Static load strength of the deviator 6.7 Wear resistance of the external protective layer for the deviator zone of the external prestressing tendon 6.8 Filling performance of the duct 6.9 Replaceability of external tendon 6.10 Restressability of external tensile elements of tendon 6.11 Tightness of anchorage zone 7 Inspection rules 7.1 Inspection classification 7.2 Type inspection 7.3 End-of-manufacturing inspection 7.4 Receiving inspection 8 Marking, packaging, transport and storage 8.1 Marking 8.2 Packaging 8.3 Transport and storage 9 Construction 9.1 Blanking and fabrication 9.2 Installation and tensioning 9.3 Grouting with cement slurry for filling 9.4 Construction acceptance 10 Inspection and monitoring 10.1 General requirements 10.2 Inspection and monitoring items 10.3 Inspection information feedback and processing Annex A (Normative) Cement slurry materials used for filling Annex B (Informative) Selection and configuration of external prestressing tendon components Annex C (Normative) Anchorage performance test of anchorage device under static load Annex D (Normative) Under-anchor load transfer test Annex E (Normative) Fatigue test of components of anchorage device Annex F (Normative) Static load test of deviators Annex G (Normative) Fatigue test of deviator zone of external prestressing tendon Annex H (Normative) Test on outer protective layer of deviator zone of external prestressing tendon Annex I (Normative) Duct filling test Annex J (Normative) External tendon replaceable test Annex K (Normative) Test for restressable tensioning of external tensile elements of tendon Annex L (Normative) Tightness test of anchorage zone