英文版 网架设计说明及施工要求.doc

Project OverviewProject nameProject siteProject scale (space frame projected area) see picProject structure: Orthogonalspatialsquare pyramidgridwith bolt-spherejoints Space frame support mode: Bottom chord column support Space frame plan size and rise: see it in the plan and elevation of the space frame Roof systemSafety level: second levelUsage: 50 yearsDesign Overview1. This project adopts SFCAD2006 FOR WINDOWS software to auxiliary design.2. Design principles of space frame: externalload of space frame made the load concentrate in the joints according to the staticequivalentprinciple. Pls ignore theeffect of the joint stiffness when you calculate and suppose joints are hinged joint and member bars only bear axial force. We adopt space truss displacement method when we design.3. Control stress of member bar: f185N/mm24. Control limit of member bars slenderness ratio: compressionbar 180 tie bar 1805. Deflection control of space frame: wL/250Basis of design, construction and qualityevaluationArchitecturalstructureloadstandards (GB50009-2012)Earthquake Resistant Design Code (GB50011-2010)Space frame structure technology procedures(JGJ7-2010)Steel structure design standards(GB50017-2003)Structural reliability design standard(GB50068-2001)Cold-formed thin-walled steel structure technical specifications(GB50018-2002)RoofConstructionTechnologyCode(GB50345-2004)Steel structure construction quality acceptance code(GB50205-2001)Space frame nodes with high strength bolts(GB/T16939-1997)Steel space frame bolt-spherejoints(JG/T10-2009)This projects technical files and relevant documentsSystem loads( not contain the space frames self-weight)Dead load of top chord: 0.20KN/m2Dead load of bottom chord: 0.20KN/m2Live load of roof: 0.50KN/m2Wind load:0.30KN/M2Snow load:1.30KN/M2Seismic fortification: 97. Temperature:40space frame materials1. Steel tube: it adopts Q235B steel. Apply to the “Space frame nodes with high strength bolts” regulation.2. Bolt ball: 45# steel should be produced and tested according to the “Steel space frame bolt-spherejoints” standard. 3.High strength bolt: 40Cr 4. Blanking plate and conehead: Q235B steel 5. Bearing and bracket: Q235B steel 6.Sockets: Adopt Q235B steel when the sockets inner diameter is 13.534, when the sockets inner diameter is 37 or bigger, it will adopt Q345B steel or 45# steel.7. Welding rod: It will adopt E43 series when Q235B steel welds with Q235B steel. It will adopt E43 series when Q235B steel welds with 45# steel. It will adopt E506 series when Q345B steel welds with 45# cessing technical specifications1. Steel yield strength and tensile strength measured values of the ratio of the measured values should not be greater than 0.85 Steel should be obvious to yield level,while elongation should not less than 20%,Should have good weldability and qualified steel impact toughness,Material all need warranty and the physical and chemical test report,The ball must hit number and all products shall comply with the quality of the steel rack industry standards.2. Space rods, bolted ball, bearing, bracket, sleeve, and anti-corrosive paint twice after sandblasting derusting3. Space frame components (including bolted ball, bars, high strength bolts, bearings, etc.) should be made in the factory with Inspection records,Ball and bolt processing, comply with the machinery industry standard on its own processing or purchased and chosed by the manufacturer,But all should meet the requirements of space frame design and construction stage of stress, deformation, etc4. Components welding should use equal strength, no slag weld nor bubbles, weld strength should be higher than the parent metal,Bearing ball must use E506 or E4303 electrode for welding, and only could be welded when heat reach o 150 degree.5. Weld quality gradeLButt welding for level 1, Angle seam welding for level 3Installation technical specifications1. Bearing surface of embedded steel plate must be level, position accurately, the orientation deviation is not more than 15 mm,Adjacent bearing elevation difference is not more than 5 mm, the surface in the vertical elevation difference is not more than 10 mm,2. To eliminate the error of the civil engineering in the embedded steel plate,space frame construction should use transition plate.3. After space frame installation, vertical and horizontal to the side length deviation value shall be 1/2000 of the length, and not more than 30 mm,Center offset value shall be 1/3000 of the space frame span, and should not more than 30 mm.The vertical deviation value shall be 1/800 of the adjacent bearing spacing, and should not be greater than 15 mm, elevation difference between the highest and lowest support should be not more than 30 mm4. After the construction of network frame deflection is not greater than the design value 15% (W) Space frame structure Corrosion protection and fire prevention1. derusting: before making steel structure ,surface should be sandblasting derusting treatment (shotting) Derusting quality level should reach national standard GB8923 sa2.5 level standard2. Coating: space truss structures, steel purlin two underlying spraying anti-corrosion primer after derusting, paint two way,after installation components need touch-up3. Steel structure fire retardant coating surface coating, fire rating is secondary grade, material decided by party A.E