SRC框架-排架结构异常节点的循环荷载试验

IF 1.4 4区 工程技术 Q3 ENGINEERING, CIVIL
Bo-Shiuan Wang, G. Cao, Kehua Yang, H. Dai, Chao-gang Qin
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引用次数: 2

摘要

火力发电厂钢骨混凝土框架排架主体结构中,由于功能要求,存在具有强梁弱柱、变柱截面、不等梁高、错高等特点的钢骨混凝土柱-钢筋混凝土梁异形节点。本文通过对五个比例因子为1/5的试件进行循环加载试验,给出了这些异常接头的试验结果。错列高度和是否在梁中加入H型钢都会改变试件的参数。对其破坏形式、承载力、耗能和延性性能进行了分析。此外,在斜撑模型的基础上,探讨了异形节点的受力机理。研究结果表明,异常外节点出现剪切破坏和柱端铰弯曲破坏;通过在异常外节点梁中加入H型钢来降低梁高,可以提高抗裂性和延性;不同错列高度的异常内节点发生柱端弯曲破坏;错列高度越大,节点的承载力和刚度越高,但延性越低。混凝土压杆机制仍然适用于TPP中的异常节点,但它受到异常特性的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cyclic loading test of abnormal joints in SRC frame-bentmain building structure
Due to functional requirements, SRC column-RC beam abnormal joints with characteristics of strong beam weak column, variable column section, unequal beam height and staggered height exist in the Steel reinforced concrete (SRC) frame-bent main building structure of thermal power plant (TPP). This paper presents the experimental results of these abnormal joints through cyclic loading tests on five specimens with scaling factor of 1/5. The staggered height and whether adding H-shaped steel in beam or not were changing parameters of specimens. The failure patterns, bearing capacity, energy dissipation and ductile performance were analyzed. In addition, the stress mechanism of the abnormal joint was discussed based on the diagonal strut model. The research results showed that the abnormal exterior joints occurred shear failure and column end hinge flexural failure; reducing beam height through adding H-shaped steel in the beam of abnormal exterior joint could improve the crack resistance and ductility; the abnormal interior joints with different staggered heights occurred column ends flexural failure; the joint with larger staggered height had the higher bearing capacity and stiffness, but lower ductility. The concrete compression strut mechanism is still applicable to the abnormal joints in TPP, but it is affected by the abnormal characteristics.
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来源期刊
Earthquakes and Structures
Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
2.90
自引率
20.00%
发文量
0
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
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