摘要
高强度螺栓连接分为摩擦型和承压型两类,是依照受剪螺栓连接的两种不同极限状态划分的。《钢结构设计规范》(GB 50017—2003)(简称03规范)不恰当地把受拉螺栓连接也纳入这两种分类,造成混乱。对此进行讨论,并提出改变分类的建议。受拉螺栓连接中螺栓通常要承受撬力。03规范不直接计算撬力,而是采用降低螺栓抗拉承载力设计值的方法,计算不够精确。《钢结构高强度螺栓连接技术规程》(JGJ 82-2011)虽然给出撬力计算方法,但存在值得商榷之处。在分析的基础上推出撬力的简化计算公式,并提出梁、柱之间抗弯连接的计算方法。最后,还提出了提高高强度螺栓抗拉承载力设计值的建议。
The classification of high-strength bolt connections into slip-critical type and bearing type is based on the two different limit states of connections under shearing force. The Code for Design of Steel Structures GB 50017-2003 unduly extends this classification to encompass connections under tension so as to invoke many confusions. This topic is discussed in this article and suggestion on modifying the classification is made. Bolts of tensile connections are usually subjected to prying force. The GB 50017 Code does not calculate this force and accounts for its effect by reducing the design value of the bolt tensile strength,and thus iniuring the calculation accuracy. The Technical Specification for High Strength Bolt Connections of Steel Structures JGJ 82 2011 although includes provisions on calculation of the prying force,there are yet quite a few arguable issues. Based on analytical work, this study puts forward a simplified formula for prying force calculation, together with an approach for calculating beam-to-column joints subjected to bending moment. Lastly, a proposal on magnifying the design value of highstrength bolts under tension is made.
出处
《建筑钢结构进展》
北大核心
2014年第3期1-6,29,共7页
Progress in Steel Building Structures
关键词
高强度螺栓
摩擦型连接
承压型连接
撬力
螺栓端板连接
high-strength bolts
slip-critical connection
bearing-type connection
prying force
bolted end-plate connection
