不同拼缝方向的预制带肋底板混凝土叠合板面内受力性能

发布时间：2017-12-30 20:16

本文关键词：不同拼缝方向的预制带肋底板混凝土叠合板面内受力性能　出处：《土木工程学报》2015年05期 　论文类型：期刊论文

【摘要】：对4个预制带肋底板混凝土叠合板试件和1个现浇混凝土板试件进行了面内低周反复加载试验,试件均呈正方形。4个叠合板试件分别为标准配筋、支座负筋加倍纵向拼缝叠合板,标准配筋、支座负筋加倍横向拼缝叠合板,现浇板试件作为对比。对各试件的破坏形态、滞回特性、变形性能、延性、刚度和耗能等进行对比分析。结果表明:预制带肋底板混凝土叠合板发生了剪切滑移破坏,现浇板发生剪切破坏。加载方向与预制带肋底板拼缝方向垂直的纵向拼缝试件的承载力、刚度均大于加载方向与拼缝方向平行的横向拼缝试件,延性也较好,耗能也较强。叠合板的刚度大于现浇板,现浇板延性略优于叠合板。增配支座负筋可使滞回环更加饱满,并可有效延缓开裂、改善延性、增加刚度、增强耗能。叠合板的预制底板一侧与现浇侧的裂缝发展及分布基本一致,二者协同工作性能良好。建议在实际工程中该叠合板宜适当提高穿孔钢筋和负筋的配筋率,以防止剪切滑移破坏。
[Abstract]:The 4 precast ribbed panel laminated concrete specimens and 1 cast-in-situ concrete slab specimens and the in-plane cyclic loading tests, the specimens are all square.4 laminate specimens were standard reinforcement, bearing negativereinforcement double longitudinal seam laminate, standard reinforcement, bearing negativereinforcement double horizontal seam laminated, cast-in-situ slab specimens for comparison. Failure modes of the specimens, hysteretic characteristics, deformation properties, ductility, stiffness and energy dissipation analysis etc.. The results show that the precast concrete composite ribbed plate occurred shear failure, cast-in-place shear failure longitudinal. Joint loading direction and precast ribbed floor seam is perpendicular to the direction of the bearing capacity of the specimen, the stiffness is greater than the loading direction and the direction parallel to the transverse seam seam specimen, better ductility, energy dissipation is also strong. Laminate stiffness is greater than the cast slab, slab with slightly better ductility In the laminate. Equipped with bearing negativereinforcement can make the hysteresis loop more full, and can effectively delay the cracking, ductility, stiffness increase, enhanced energy consumption. The development of cracks of cast-in-place and precast floor side side laminated and distribution are basically the same, the two collaborative work performance. Suggestions in practical engineering of the stack it is better to increase the slab reinforcement of perforated steel and negative reinforcement ratio to prevent shear failure.

【作者单位】：兰州大学西部灾害与环境力学教育部重点实验室;兰州大学土木工程与力学学院;中国建筑设计研究院;中国民航机场建设集团公司;山东同圆设计集团有限公司;
【基金】：国家自然科学基金(51078176,51208241) 兰州大学中央高校基本科研业务费专项资金(lzujbky-2013-m01)
【分类号】：TU375.2
【正文快照】： 引言从20世纪40年代开始,叠合板已经在房屋建筑中使用。目前使用的主要有预应力混凝土空心板叠合板[1-3]、预应力混凝土双T板叠合板[4-5]及钢筋桁架叠合板等。中国在20世纪50年代开始使用叠合板,到80年代已经得到广泛应用,对叠合板也进行了大量研究,如预制平板叠合板试验研究[

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