Behavior of precast, prestressed concrete sandwich wall panels reinforced with CFRP shear grid
Behavior of precast, prestressed concrete sandwich wall panels reinforced with CFRP shear grid
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DOI：
10.15554/pcij.03012011.42.54
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发表时间：
2011-03
期刊：
影响因子：
1.1
通讯作者：
B. Frankl;G. Lucier;T. Hassan;S. Rizkalla
中科院分区：
文献类型：
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作者：
B. Frankl;G. Lucier;T. Hassan;S. Rizkalla
本文描述了用碳纤维增强聚合物（CFRP）剪切网格加固的预制预应力混凝土夹芯墙板的结构行为，以实现复合作用。使用CFRP作为剪切传递机制的目的是提高隔热效率、延长使用寿命并提高面板的整体结构能力。这项研究包括测试六块全尺寸夹芯墙板，每块尺寸为 20 英尺 x 12 英尺（6.1 米 x 3.7 米）。该面板由两个外部预应力混凝土板和一个内部绝缘板组成。该研究包括两种类型的隔热材料和几种具有不同 CFRP 加固比率的剪切传递机制，以检查两种混凝土结构之间产生的复合作用程度。所有面板同时承受重力和横向载荷。反向循环横向载荷模拟了风压和吸力的影响。所有面板均经受大约 4000 次侧向载荷循环，并存在因素重力载荷。在每个疲劳状态之后，横向载荷都会增加，直到发生故障。将实验程序的测试结果与完全复合和非复合作用的理论预测进行比较，以评估复合作用百分比并评估最佳面板配置。
This paper describes the structural behavior of precast, prestressed concrete sandwich wall panels reinforced with carbon-fiber-reinforced polymer (CFRP) shear grid to achieve composite action. Use of CFRP as a shear transfer mechanism was intended to increase the thermal insulation efficiency, enhance the service life, and increase the overall structural capacities of the panels. This study included testing of six full-scale sandwich wall panels, each measuring 20 ft x 12 ft (6.1 m x 3.7 m). The panels consisted of two outer prestressed concrete wythes and an inner insulation wythe. The study included two types of insulation and several shear transfer mechanisms with different CFRP reinforcement ratios to examine the degree of composite action developed between the two concrete wythes. All panels were simultaneously subjected to applied gravity and lateral loads. Reverse-cyclic lateral loads simulated the effects of wind pressure and suction. All panels were subjected to approximately 4000 cycles of lateral loading with the presence of factored gravity load. Following each fatigue regime, the lateral loads were increased until failure was achieved. Test results of the experimental program were compared with theoretical predictions of fully composite and noncomposite actions to evaluate the percent composite action and to assess the optimum panel configuration.