粘结和双向锚固对贯通锚杆CFST连接滞回性能的影响

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2020-11-01 DOI:10.12989/EAS.2020.19.5.315

M. Ajith, K. Beena, S. Sheela

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引用次数: 1

摘要

钢管混凝土螺栓连接在抗震性能和可施工性方面已被证明是良好的。采用全贯通螺栓的加筋延伸端板连接有助于完全避免现场焊接，从而提高接头质量。对方形内梁柱连接的滞回性能进行了试验研究。研究了拉杆与核心混凝土之间的粘结对节点循环性能的影响。该研究还量化了双向螺栓连接引起的约束效应对内部节点的加固程度，双向螺栓连接在三维抗弯框架中广泛使用。为了更好地理解机理并预测面板区域的剪切能力，生成了一个数学模型。模型中包括的各种参数包括轴向载荷、螺栓拧紧引起的预应力量、锚固和混凝土支柱作用的影响。该研究调查了强度、刚度、延性和能量耗散特性。结果表明，其抗震性能符合美国钢结构协会（AISC）的抗震建议。双向螺栓连接和粘结效应对节点的性能有显著影响。

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Effect of bond and bidirectional bolting onhysteretic performance of through bolt CFST connections

Through bolt connections in Concrete Filled Steel Tubes (CFSTs) has been proved to be good in terms of seismic performance and constructability. Stiffened extended end plate connection with full through type bolt helps to avoid field weld altogether, and hence to improve the quality of joints. An experimental study was conducted on the hysteretic performance of square interior beam-column connections using flat extended end plates with through bolt. The study focuses on the effect of the bond between the tie rod and the core concrete on the cyclic performance of the joint. The study also quantifies how much the interior joint is getting strengthened due to the confinement effect induced by bi-directional bolting, which is widely used in 3D moment resisting frames. For a better understanding of the mechanism and for the prediction of shear capacity of the panel zone, a mathematical model was generated. The various parameters included in the model are the influence of axial load, amount of prestress induced by bolt tightening, anchorage, and the concrete strut action. The study investigates the strength, stiffness, ductility, and energy dissipation characteristics. The results indicate that the seismic resistance is at par with American Institute of Steel Construction (AISC) seismic recommendations. The bidirectional bolting and bond effect have got remarkable influence on the performance of joints.

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来源期刊

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response