单边螺栓连接钢结构仿古建筑异形节点地震损伤性能评估
吴占景 , 王新武 , 布欣 , 米红甫 , 董金爽
建筑钢结构进展 ›› 2026, Vol. 28 ›› Issue (9) : 31 -40.
单边螺栓连接钢结构仿古建筑异形节点地震损伤性能评估
Seismic Damage Assessment of Irregular Joints in Steel Chinese Traditional-Style Buildings with Blind Bolts
为了评估单边螺栓连接钢结构仿古建筑(steel Chinese traditional-style building, SCTB)异形节点在地震作用下的损伤特性,在原有全焊连接仿古建筑异形节点的基础上,依据中国古建筑形制构造要求,采用单边螺栓-T型钢连接形式,设计并制作了4个单边螺栓连接SCTB异形节点。通过拟静力试验,获得了节点的破坏模式、滞回性能及刚度退化等抗震性能指标。试验结果表明:单边螺栓连接SCTB异形节点的变形和破坏主要集中在T型钢区域,T型钢翼缘先发生弯曲变形,最终在翼缘与腹板交界处出现裂纹并断裂。双梁节点的滞回曲线更为饱满,且整体刚度高于单梁节点的整体刚度。采用考虑残余变形累积损伤修正的Park-Ang损伤模型研究了节点的损伤演化过程与破坏程度。研究成果为装配式SCTB的优化设计与推广应用提供了理论依据和技术支撑。
In order to evaluate the seismic damage characteristics of irregular joints in steel Chinese traditional-style buildings (SCTBs) with blind bolts, four specimens were designed and fabricated based on the fully welded joints previously used in such structures. The design complied with the architectural and structural requirements of traditional Chinese architecture and incorporated blind bolt-T-stub connections. Quasi-static tests were conducted to investigate seismic performance indicators, including failure modes, hysteretic behavior, and stiffness degradation. The results indicated that deformation and failure of irregular joints in SCTBs with blind bolts were primarily concentrated in the T-stub region, where the flange first underwent bending deformation, followed by cracking and fracture at the junction between the flange and web. Compared with single-beam-column joints, double-beam-column joints exhibited fuller hysteresis loops and greater overall stiffness. The damage evolution and failure severity of the specimens were investigated using a modified Park-Ang damage model that considers cumulative damage due to residual deformation. The findings may provide a theoretical basis and technical support for the optimized design and broader application of prefabricated SCTBs.
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国家自然科学基金(52008330)
国家重点研发计划资助项目(2019YFD1101003)
河南省科技厅科技攻关资助项目(242102320318)
海南省重大科技计划资助项目(ZDKJ201803)
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