美标AISC DG4端板节点计算与国标对比  

Comparison of End Plate Connection Design Between AISC DG4 and GB Codes

作　　者：郭丹 贺文星 Dan Guo;Wenxing He(Morimatsu(China),Group,Shanghai 201323,China)

机构地区：[1]森松集团(中国)有限公司,上海201323

出　　处：《钢结构（中英文）》2021年第4期32-49,共18页Steel Construction（Chinese & English）

摘　　要：端板节点是一种钢结构多层建筑中常用的节点,在美国应用较为普遍,在我国应用不多。针对此现象,将国标和美标规范进行了对比。通过对比发现,美国标准对端板节点的研究很完善,AISC DG4和DG16都是对端板节点的设计指导,DG4设计流程适用于风和地震作用下的端板外伸式梁柱节点(即刚接节点),梁柱节点域的计算参见DG13;DG16适用于非地震或风作用时的平端板和外伸端板计算(即半刚接节点)。相比之下,国标规范对端板节点的核算就较为简单,在JGJ 82—2011《钢结构高强度螺栓连接技术规程》(简称《螺栓规程》)和GB 51022—2015《门式刚架轻型房屋钢结构技术规范》(简称《门刚规范》)中均涉及到了端板节点的计算,但《螺栓规程》中未给出板厚计算方法,仅按构造要求板厚不小于16 mm且不小于螺栓直径;而《门刚规范》未给出螺栓计算方法,仅给出了板厚的计算。可见:两个规范对此类节点的计算都不够完整。为了论证国标规范对螺栓及端板厚度的选取是否合理,也为了判断按照国标规范设计端板节点是否可以作为刚接节点,选取AISC DG4与国标规范进行对比,从基础理论开始,简单论述了美国对于端板节点的研究历史以及美标DG4的计算原理、计算假定,然后以实例的形式按照DG4的设计流程对该实例进行了详细的解答,并与《螺栓规程》《门刚规范》的计算结果对比,分析两国规范的计算原理和结果的不同之处。通过对比发现,两国规范对受拉翼缘受力的计算原理相同,受拉翼缘所承受的拉力由受拉区螺栓承担,对受拉区螺栓的受力计算,两国规范有所差异,但差异不大,不至于影响螺栓规格选取;只是对端板厚度的计算方法差异较大,美标采用屈服线理论,利用了板的塑性抗弯强度,国标规范仍在板的弹性范围内计算,国标计算方法偏于保守。DG4中附录B是端板节点的初步设�End plate connection is commonly used in multi-story buildings, which is widely used in American Standard Design, but rarely in Chinese Standard Design. In response to that, the comparison between American and Chinese standard design is conducted, through which it’s found that the American Standard has been deeply investigated, such as AISC DG4, DG16. The DG4 design procedure suits to extended end plates yielding to wind and seismic design(rigid joint). For the beam-column joint of extended end plate, refer to DG13. DG16 suits to flush end plate and extended end plates yielding to non-seismic or wind design(semi-rigid joint). In contrast, associated calculation procedure per Chinese Standard is quite preliminary. Both JGJ 82-2011 Technical Specification for High Strength Bolt Connections of Steel Structures( "Bolt Regulations" hereinafter) and GB 51022-2015 Technical Code for Steel Structure of Light-weight Building with Gabled Frames( "Gabled Frames Specifications" hereinafter) provide clauses dealing with end plate connection design, but the plate thickness calculation method is not given in the Bolt Regulations, only with a mandatory term of plate thickness no less than 16 mm nor less than the bolt diameter being identified. Meanwhile, calculation method of bolt arrays is not given in Gabled Frames Specifications, but only providing the end plate thickness calculation. Neither of these standards integrates the end plate connection design procedure. In order to rationalize the bolt and end plate design of the connection, also to valid the end plate connection as rigid joint in Chinese Standard Design, the article presents what distinctively different between AISC DG4 and GB/JGJ since the researching history, calculation theory, assumptions, case studies and analysis. The connection tension member design concurs between AISC DG4 and GB/JGJ, the bolt sizing procedures are basically the same, but the calculation of the end plate thickness varies drastically in between, Yield Line Theory was adopted by American S

关 键 词：屈服线理论 地震作用 外伸端板节点 塑性铰 

分 类 号：TU391[建筑科学—结构工程]