单面螺栓连接及装配式钢结构节点理论与试验研究

发布时间：2018-02-25 23:14

本文关键词： 新型单面自紧高强螺栓力学性能装配式钢结构节点试验研究　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：钢结构住宅具有抗震性能好、施工速度快、绿色节能等优点,符合住宅产业化和可持续发展的要求。随着我国钢产量日益增加,以及钢结构设计和安装技术的日趋成熟,发展装配式钢结构住宅成为我国住宅产业化进程中的关键。在钢结构的设计中,梁柱节点起着传递梁柱之间弯矩和剪力的作用,其性能优劣直接影响到结构的整体反应,是钢结构设计中的重中之重。方钢管柱与H型钢梁连接节点由于其优越的受力性能,得到国内外研究者的广泛关注。针对目前方钢管柱与H型钢梁节点在实践中施工技术和焊接质量不能兼得以及螺栓需两边操作安装等问题,为进一步丰富和完善方钢管柱与钢梁之间节点连接形式,本文提出一种新型单面自紧高强螺栓钢结构连接节点。新型单面自紧螺栓主要通过改变传统的连接方式,使用特定形式的螺栓和操作方式,使其可以在一边采用扭剪电动扳手来拧紧和固定的特殊螺栓,而无需像传统螺栓一样进行两边操作。通过此种单面螺栓可实现矩形钢管等封闭截面柱与钢梁的全螺栓连接。结合国内外单边螺栓紧固系统相关产品的开发思路和研究现状以及国内扭剪型高强螺栓的应用现状,本文以扭剪型高强螺栓为基材,经历了新型单面自紧高强螺栓的成形过程、成形机理、传力机理等方面的试验探索与研究,并配以少量的ABAQUS有限元分析,最终提出了一种新型单面自紧高强螺栓。为获取新型单面自紧高强螺栓的各项力学性能指标,分别对新型单面自紧高强螺栓进行了预紧力时变效应测试试验、抗滑移系数测定试验和抗剪承载力性能理论与试验研究,并与扭剪型高强螺栓进行对比。研究成果表明：新型单面自紧高强螺栓能够达到扭剪型高强螺栓的力学性能,并能够符合相关规范中的力学要求。为了验证新型单面自紧高强螺栓的工程实用性,对新型单面自紧高强螺栓与扭剪型高强螺栓外伸式端板装配式钢结构节点试件进行了水平加载试验,对比研究了两种螺栓的外伸式端板钢结构连接节点的弯矩-转角关系曲线、屈服荷载、极限荷载、螺栓的受力性能、螺栓拉力的分布情况以及梁、端板、柱的应力变化和分布情况。试验研究成果表明：新型单面自紧高强螺栓同扭剪型高强螺栓一样可以在工程中为钢结构梁柱提供可靠的连接,进而验证了新型单面自紧高强螺栓在实际工程中的适用性。
[Abstract]:Steel structure housing has the advantages of good seismic performance, fast construction speed, green energy saving and so on. It meets the requirements of housing industrialization and sustainable development. With the increasing steel output in our country, and the maturity of steel structure design and installation technology, steel structure design and installation technology is becoming more and more mature. In the design of steel structure, Liang Zhu node plays the role of transferring bending moment and shearing force between Liang Zhu, and its performance directly affects the overall response of the structure. The connection joint between square steel pipe column and H-shaped steel beam is the most important in the design of steel structure, because of its superior mechanical performance, In view of the problems that the construction technology and welding quality of square steel pipe column and H-type steel beam joint can not be obtained in practice, and the bolt needs to be operated and installed on both sides, In order to further enrich and improve the connection form between square steel pipe column and steel beam, a new type of single-side self-tightening high-strength bolted steel structure connection joint is proposed in this paper. The new single-side self-tightening bolt mainly changes the traditional connection mode. Using a particular form of bolt and operation to enable it to tighten and fix special bolts on one side with a torsional shearing electric wrench, This kind of single side bolt can be used to realize the full bolt connection between rectangular steel tube and steel beam with closed section column. Combined with the development of products related to unilateral bolt fastening system at home and abroad. And the current situation of research and application of torsional shear high strength bolts in China, In this paper, the torsional shear high strength bolt is used as the base material, the forming process, forming mechanism and force transfer mechanism of the new single-side self-tightening high-strength bolt are studied and tested, and a small amount of ABAQUS finite element analysis is used. Finally, a new type of single-side self-tightening high-strength bolt is proposed. In order to obtain the mechanical properties of the new single-side self-tightening high-strength bolt, the time-varying effect of pre-tightening force of the new single-side self-tightening high-strength bolt is tested separately. The testing of slip coefficient and the theoretical and experimental study of shear bearing capacity are compared with those of torsional shear bolt. The results show that the new single-side self-tightening high-strength bolt can achieve the mechanical properties of torsional shear high-strength bolt. In order to verify the engineering practicability of the new single-side self-tightening high-strength bolt, In this paper, horizontal loading tests are carried out on the specimens of a new type of single-side self-tightening high-strength bolt and torsional shear high-strength bolt with outstretched end-plate assembly steel structure, and the moment to angle curves of the connections of the two kinds of bolts are comparatively studied. Yield load, ultimate load, mechanical behavior of bolt, distribution of bolt tensile force, beam, end plate, The experimental results show that the new self-tightening high-strength bolt can provide reliable connection for the steel structure Liang Zhu in the same way as torsional shear high-strength bolt. Furthermore, the applicability of the new self-tightening high-strength bolt on one side in practical engineering is verified.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU391

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