jgj82-91钢结构高强度螺栓连接的设计、施工及验收规范英文版

jgj82-91钢结构高强度螺栓连接的设计、施工及验收规范英文版内容摘要：

tension in the bolt’s axial direction, the design value of sheer bearing capacity shall be lowered by multiplying   P NP . When high strength frictiontype bolting is adopted for elements bearing the force in the axial direction, the strength  of the element shall be calculated according to the following equation: fANn  39。  () fANn  () where Naxial tension or axial pressure。 N’converted axial force, for mon steel structural elements: Nnn )( 1 , for coldbending thinwall type steel structural elements: Nnn )( 1。 nA section area of the element。 Agross section area of the element。 1n number of high strength bolts on the calculated section (joint with the outmost line of bolts)。 non the node or the connection, the number of high strength bolts connected to one end of the element。 f design value of tensile or pact strength of the element steel.. The shearresistant friction type connection under the repeated dynamic loads may be not subject to the fatigue calculation, but the base metal at the connection shall be subject to the fatigue calculation in pliance with the ―Code for design of steel structure‖ (GBJ17). Section III Calculation of Pressurebearing Connections For the pressurebearing connection of high strength bolting, the design value of pretension P shall be applied according to the values in Table . The treatment of the friction surface of such connection is the same as the frictiontype connection. For the shearbearing pressurebearing connection, the load bearing capacity of each high strength bolt shall be the lower of the design value of the shear bearing and pressure bearing capacity。 in addition, the value of the shear load shall also be controlled according to : Design value of the shear load bvvbv fdnN  42 (—1) Design value of the pressurized load   bcbc ftdN (—2) where vn number of shear bearing surfaces。 d nominal diameter of the bolt。 in the equation (—1), when the shear surface is at the thread, the effective diameter ed of the thread shall be used instead of d, but it is necessary to try to avoid the thread going into the shear surface。 t the lower total thickness of the pressure bearing element in the same force bearing direction。 bcbv ff , the design value of the bolt’s shear bearing capacity and the base material’s pressure bearing capacity, which shall be in pliance with Table Table Design value of pressure bearing connection (kN/cm2) Description Performance grade of the bolts Material of element steel 3 Steel 16Mn or 16Mnq steel, steel thickness (mm) 15Mn or 15Mnq steel, steel thickness (mm)  16 1125 2636  16 1725 2636 bvf / / / / / / / bcf / / When the pressure bearing connection is bearing the external tensile force in the bolt’s axial direction, the design value btN of the tensile force for each high strength bolt shall be calculated according to equation . When the pressure bearing connection is bearing both the shear and the external tensile force in the axial direction of the bolt, the external force on each high strength bolt shall meet the requirements of equations and . 12  vttbvv NNNN ( – 1) bcv NN  ( – 2) where tV NN, the shear and tensile force on each high strength bolt bcbtbv NNN , the design value of shear, tensile and pressure bearing capacity of each High strength bolt. For the pressure bearing connection bearing the shear force or bearing the shear and axial tensile force, the design shear force for high strength bolt shall not exceed times that as calculated in term of the friction type connection. For the structure bearing forces at its axial center, which adopts the pressurized High strength bolting, on the joint, the strength  of the structure shall be calculated according to the following equation: fANn  () Section IV Design of the Joint On the same forcebearing part of the same joint, the connection bined by High strength bolt friction joint and pressure bearing connection shall not be adopted, the connection bined by High strength bolt and normal bolt shall also not be adopted. On the same forcebearing part of the same joint in the innovation, extension and strengthening project with the majority structure bearing the static load, the High strength bolt friction joint together with sideangle weld seam or rivet is permitted, considering their normal work. For the same joint, the connection bined with different joints in terms of different forcebearing parts is adopted (such as in the steel node of the girder column, the flange of the girder welded with the column, the girder web plate connected with the column by High strength bolt), considering their normal work. For the joints of the different thickness plate, the shim is provided. Both surfaces of the plate shall be treated the same way as the mother material. When the differential thickness of the plate is equal or less than 3mm, the table of can be referred. the quantity of High strength bolt shall increase in the following joints: I. For two pieces connected through shim or other intermediate plate, the quantity of pressurized High strength bolts shall increase by 10% of the calculation. II. For lap joint or singlesurface connection by splice plate, the quantity of pressurized High strength bolts shall increase by 10% of the calculation. III. For the end joint of the structure, when short angle steel is used to connect the extended limb of the profiled bar (angle or channel steel)。