扭剪型高强螺栓标准规范？
Standard Specification for torsional shear type high strength bolts?
高强螺栓主要应用在钢结构工程上,用来连接钢结构钢板的连接点.高强螺栓的一个非常重要的特点就是限单次使用，一般用于长时间连接，严禁重复使用！高强螺栓分类：按受力状态分为：摩擦型和承压型；
High strength bolts are mainly used in steel structure engineering to connect the connection points of steel structure steel plates A very important feature of high-strength bolts is that they are limited to single use. They are generally used for long-term connection. Reuse is strictly prohibited! Classification of high-strength bolts: according to the stress state, they are divided into friction type and pressure bearing type;
按施工工艺分为：扭剪型高强螺栓和大六角高强螺栓。
According to the construction process, it is divided into torsion shear high-strength bolt and large hexagon high-strength bolt.
大六角高强螺栓属于普通螺丝的高强度级,而扭剪型高强螺栓则是大六角高强螺栓的改进型,为了更好施工.高强螺栓的施工需要先初紧后终紧,初紧高强螺栓需用冲击型电动扳手或扭矩可调电动扳手;而终紧高强螺栓有严格的要求,终紧扭剪型高强螺栓需要用扭剪型电动扳手,终紧扭矩型高强螺栓需要用扭矩型电动扳手.
Large hexagon high-strength bolt belongs to the high-strength grade of ordinary screw, while torsion shear high-strength bolt is an improved type of large hexagon high-strength bolt for better construction The construction of high-strength bolts requires initial tightening before final tightening, and the initial tightening of high-strength bolts requires impact electric wrench or torque adjustable electric wrench; The final tightening of high-strength bolts has strict requirements. The final tightening of torsional shear high-strength bolts requires torsional shear electric wrench, and the final tightening of torque high-strength bolts requires torque electric wrench
大六角强螺栓 由一个螺栓，一个螺母，两个垫圈组成。扭剪型高强螺栓 由一个螺栓，一个螺母，一个垫圈组成。用高强度钢制造的,或者需要施以较大预紧力的螺栓,皆可称为高强度螺栓.高强度螺栓多用于桥梁、钢轨、高压设备的连接.这种螺栓的断裂多为脆性断裂.应用于高压设备上的高强度螺栓,为了保证容器的密封,需要施以较大的预应力.关于高强度螺栓的几个概念：按规定螺栓的性能等级在8.8级以上者,称为高强度螺栓.现标准只罗列到M39,对于大尺寸规格,特别是长度大于10~15倍的高强度螺栓,国内生产尚属短线.
The large hexagon strong bolt is composed of a bolt, a nut and two washers. Torsional shear high-strength bolt is composed of a bolt, a nut and a washer. Bolts made of high strength steel or requiring large preload can be called high strength bolts High strength bolts are mostly used for the connection of bridges, rails and high-voltage equipment The fracture of this kind of bolt is brittle fracture High strength bolts used in high pressure equipment need to be prestressed to ensure the sealing of the container Several concepts about high strength bolt: according to the regulations, the performance grade of bolt is above grade 8.8, which is called high strength bolt At present, the national standard only lists M39. For large-size specifications, especially high-strength bolts with length greater than 10 ~ 15 times, domestic production is still a short line
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