褚云朋, 梁锋, 龚寅东, 周锐, 崔林涛. 斜加劲薄壁钢板加固RC框架抗震性能[J]. 北京工业大学学报, 2023, 49(1): 20-32. DOI: 10.11936/bjutxb2021110025
    引用本文: 褚云朋, 梁锋, 龚寅东, 周锐, 崔林涛. 斜加劲薄壁钢板加固RC框架抗震性能[J]. 北京工业大学学报, 2023, 49(1): 20-32. DOI: 10.11936/bjutxb2021110025
    CHU Yunpeng, LIANG Feng, GONG Yindong, ZHOU Rui, CUI Lintao. Seismic Performance of RC Frame Strengthened With Stiffened Thin-walled Steel Plate[J]. Journal of Beijing University of Technology, 2023, 49(1): 20-32. DOI: 10.11936/bjutxb2021110025
    Citation: CHU Yunpeng, LIANG Feng, GONG Yindong, ZHOU Rui, CUI Lintao. Seismic Performance of RC Frame Strengthened With Stiffened Thin-walled Steel Plate[J]. Journal of Beijing University of Technology, 2023, 49(1): 20-32. DOI: 10.11936/bjutxb2021110025

    斜加劲薄壁钢板加固RC框架抗震性能

    Seismic Performance of RC Frame Strengthened With Stiffened Thin-walled Steel Plate

    • 摘要: 为探究经内嵌式薄壁钢板和沿主受力际线布置加劲肋加强后钢筋混凝土框架的抗震能力,对不同高厚比钢板加固试件进行低周往复加载试验,并利用ABAQUS建立有限元模型,分析肋板刚度比、高厚比和轴压比对加固试件抗震性能的影响.结果表明:未加强试件在梁端和柱端都出现塑性铰,而加强后试件仅在梁端出现塑性铰,改变了出铰机制,提高了试件抗震性能;设置加劲肋将薄壁钢板分成多个小区格板,边界约束条件增强,有效抑制薄钢板的面外变形,提高薄壁钢板的承载能力和耗能能力;经加固后的试件承载能力和耗能能力提高,刚度大幅提高,破坏时梁柱节点区域保持完好,改善了加固后试件的抗震性能,但采用3 mm和4 mm薄壁钢板加强后的试件抗震性能差比较小;肋板刚度比、高厚比、轴压比对试件的抗震性能均有明显影响.

       

      Abstract: To explore the influence of the seismic capacity of the RC frame strengthened by the embedded thin-walled steel plate and the stiffener along the main force line, low-cycle reciprocating loading tests were carried out on specimens reinforced with steel plates with different height-to-thickness ratios and ABAQUS was used to establish a finite element model to analyze the effects of rib stiffness ratio, height-to-thickness ratio and axial compression ratio on the seismic performance of the reinforced specimens. Results show that there are plastic hinges at the beam end and column end of the unreinforced specimen, but only plastic hinges at the beam end of the reinforced specimens, which changed the hinge mechanism and improved the seismic performance of the specimen; stiffeners were set to thin the wall. The steel plate was divided into multiple cell grids, which enhanced the boundary constraint conditions, suppressed the out-of-plane deformation of the thin steel plate, and improved the bearing capacity and energy consumption capacity of the thin-walled steel plate. The load-bearing capacity, consumption capacity, stiffness and seismic performance of the reinforced specimens were all improved, and the beam-column joint area remaind intact during failure. However, the seismic performance of the specimens strengthened with 3 mm and 4 mm thin-walled steel plates was relatively small. The rib stiffness ratio, height-to-thickness ratio and axial compression ratio have a significant effect on the seismic performance of the specimen.

       

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