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Lateral stiffness and vibration characteristics of damaged RC coupled shear walls strengthened with thin composite plates

机译：复合材料薄板加固受损RC耦合剪力墙的侧向刚度和振动特性

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摘要

This paper deals with the bending and vibration analysis of moderately damaged coupled shear wall structures with externally bonded carbon fiber-reinforced polymer (CFRP) sheets. In the analytical formulation, the adherent and the adhesive layers are all modelled as shear walls, using the mixed finite-element method (FEM). The anisotropic damage model is adopted to describe the damage extent of the RC coupled shear walls. A free vibration analysis is carried out to determine the frequencies of multi-storey strengthened shear wall structures with openings. Test problems are conducted to demonstrate the accuracy and effectiveness of the proposed method. Numerical results are presented to show the performance of reinforced concrete coupled shear wall structures bonded with composite plates in which a damaged RC shear wall with openings strengthened by a thin steel sheets is treated as a comparator. The effects of damage extent and of the bonded sheets on the bending and vibration characteristics of damaged RC coupled shear wall structures are also studied.
机译：本文研究了带有外部粘结碳纤维增强聚合物（CFRP）板的中度受损耦合剪力墙结构的弯曲和振动分析。在分析配方中，使用混合有限元方法（FEM）将粘附层和粘附层都建模为剪力墙。采用各向异性损伤模型描述了RC耦合剪力墙的损伤程度。进行自由振动分析，以确定带有开口的多层加固剪力墙结构的频率。进行测试问题以证明所提出方法的准确性和有效性。数值结果显示了用复合板粘结的钢筋混凝土耦合剪力墙结构的性能，其中以薄钢板加固的破损钢筋混凝土剪力墙为开口。还研究了损伤程度和粘结片对受损RC剪力墙结构的弯曲和振动特性的影响。

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