内嵌钢板混凝土组合连梁抗震性能试验研究

发布时间：2018-04-26 07:15

本文选题：钢板 + 组合连梁　；参考：《土木工程学报》2017年02期

【摘要】：为改善传统高层建筑剪力墙连梁的抗震性能,设计并制作3个内嵌钢板混凝土组合(SPC)连梁和1个交叉斜筋钢筋混凝土连梁试件并进行低周往复加载试验。试件变化参数包括连梁纵筋配筋率和配板形式。对比分析各连梁的破坏过程、滞回性能、耗能能力、强刚度退化、承载力、延性以及变形能力等。结果表明,连梁试件发生弯剪和弯曲两种破坏模式;增大连梁纵筋配筋率在提高承载力的同时降低了试件的延性变形;在配板率相同情况下,钢板形式由单钢板改变为拉结双层钢板,连梁受力性能相似,当单层钢板厚度较大时可采用双层钢板设计方案;钢板的设置可有效提高试件的承载力与延性,较好改善滞回曲线的捏拢效应,同时参与连梁端部塑性铰区的抗弯,提供较大的抵抗弯矩,钢板的受压作用也可提高塑性铰的转动能力。与交叉配筋钢筋混凝土连梁相比,利用钢板良好的承载力和延性变形能力,内嵌钢板混凝土组合连梁具有稳定的滞回性能和耗能能力且施工简单,其综合抗震性能优于传统配筋混凝土连梁。
[Abstract]:In order to improve the seismic behavior of shear wall beams of traditional high-rise buildings, three steel plate reinforced concrete (SPC) connecting beams and one cross reinforced concrete beam with skew reinforcement were designed and fabricated, and the low-cycle reciprocating loading tests were carried out. The variation parameters of the specimen include the reinforcement ratio and the plate form of the connecting beam. The failure process, hysteretic performance, energy dissipation capacity, strong stiffness degradation, bearing capacity, ductility and deformation capacity of each connecting beam are compared and analyzed. The results show that there are two failure modes, bending shear and bending, increasing the reinforcement ratio of longitudinal reinforcement in Dalian beam not only increases the bearing capacity but also reduces the ductile deformation of the specimen. The form of steel plate is changed from single steel plate to double-layer steel plate, the mechanical behavior of connecting beam is similar, when the thickness of single-layer steel plate is large, the design scheme of double-layer steel plate can be adopted, and the setting of steel plate can effectively improve the bearing capacity and ductility of the specimen. The clamping effect of hysteretic curve is improved, and the bending resistance of plastic hinge region at the end of connected beam is improved. The bending moment is provided and the rotation ability of plastic hinge can be improved by the compression of steel plate. Compared with the reinforced concrete beam with cross reinforcement, the steel plate has good bearing capacity and ductile deformation ability, and the embedded steel plate concrete composite connecting beam has stable hysteretic performance and energy dissipation ability, and the construction is simple. Its comprehensive seismic performance is superior to the traditional reinforced concrete beam.
【作者单位】：华侨大学;福建省结构工程与防灾重点实验室;
【基金】：国家自然科学基金(51308236,51378228) 教育部高等学校博士学科点专项科研基金(20133501120003) 福建省自然科学基金(2014J05061)
【分类号】：TU398.9

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