方志1,2,李益州1,胡锐1.混合配筋活性粉末混凝土剪力墙的抗震性能[J].湖南大学学报:自然科学版,2019,(11):1~10
混合配筋活性粉末混凝土剪力墙的抗震性能
Study on Seismic Performance of RPC Shear Walls with Hybrid Reinforcement
  
DOI:
中文关键词:  活性粉末混凝土  碳纤维增强复合材料  剪力墙  有限元分析  抗震性能
英文关键词:reactive powder concrete(RPC)  carbon fiber reinforced polymer (CFRP)  shearwall  finite element analysis  seismic performance
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作者单位
方志1,2,李益州1,胡锐1 (1. 湖南大学 土木工程学院湖南 长沙 410082 2. 风工程与桥梁工程湖南省重点实验室(湖南大学)湖南 长沙 410082) 
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中文摘要:
      为形成一种兼具良好耗能能力和可恢复性的配筋混凝土剪力墙结构,提出了一种由普通钢筋和碳纤维增强复合材料(CFRP,Carbon Fiber Reinforced Polymers)混合配筋的超高性能活性粉末混凝土(RPC,Reactive Powder Concrete)剪力墙结构体系. 利用非线性有限元软件DIANA,建立了用以分析配筋混凝土剪力墙抗震性能的非线性有限元模型,并以文献试验结果验证了分析模型的适用性. 基于所建立的模型,对不同配筋形式普通混凝土和活性粉末混凝土剪力墙的抗震性能进行了分析. 结果表明:就所分析的构件参数及工况而言,由于RPC材料具有更好的延性,使得钢筋RPC剪力墙的延性系数较普通钢筋混凝土剪力墙提高了42%;与普通钢筋混凝土剪力墙相比,墙肢配置CFRP筋、暗柱配置普通钢筋的混合配筋RPC剪力墙的耗能能力提高了51%,延性系数提高了30%,自复位能力系数提高了25%. 验证了所提混合配筋RPC剪力墙结构体系良好的综合抗震性能. 混合配筋剪力墙墙肢内CFRP纵向钢筋的配筋率宜为暗柱内纵向普通钢筋配筋率的0.5~1.0.
英文摘要:
      In order to create a reinforced concrete shear wall structure with good energy dissipation and resilience,a kind of ultra-high performance concrete RPC (Reactive Powder Concrete) shear wall structure composed of ordinary reinforcement and CFRP (Carbon Fiber Reinforced Polymers) was presented. A nonlinear finite element model using nonlinear finite element software DIANA was established to analyze the seismic performance of reinforced concrete shear walls. The applicability of the model was verified by the test results in this paper and other references. Based on the constructed model,the seismic behavior of normal concrete and RPC shear walls with different reinforcement types was analyzed. The results showed that,in terms of the analyzed situation,the ductility coefficient of reinforced RPC shear wall was increased by 42% when compared with that of reinforced concrete shear wall due to the better ductility of RPC material. Compared with reinforced concrete shear wall,the energy dissipation capacity of RPC shear wall reinforced with CFRP bars for wall and ordinary reinforcement for side columns was increased by 51%,the ductility coefficient was increased by 30%,and the self-resetting capacity coefficient was increased by 25%. It is verified that the proposed hybrid reinforced RPC shear wall structure system has good comprehensive seismic performance. The reinforcement ratio of CFRP longitudinal reinforcement in shear walls with mixed reinforcement should be between 0.5 and 1.0 of ordinary longitudinal reinforcement in side columns.
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