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Seismic Performance of a New Type of Reinforced Concrete Energy Dissipation Structure
KSCE Journal of Civil Engineering ( IF 2.2 ) Pub Date : 2020-07-31 , DOI: 10.1007/s12205-020-2226-0
Penghui Yang , Xingwen Liang

High-performance fiber-reinforced concrete (HPFRC) is an ideal energy dissipation material because of its high tensile ductility and multiple fine-crack development. An HPFRC energy dissipation wall was installed in a reinforced concrete (RC) frame to form a new RC frame-HPFRC energy dissipation wall aseismic structure. Two half-scale RC frame-HPFRC energy dissipation wall specimens were designed and constructed. Quasi-static tests were performed to study the failure mechanism, deformation performance, stiffness degradation, and energy dissipation performance. The effective stiffness of the RC frame-HPFRC energy dissipation wall at the peak load was analyzed. The test results indicate that RC frame-HPFRC energy dissipation wall structures can achieve the seismic fortification objective of being “repairable after major earthquake”. Compared with the RC frame with one energy dissipation wall, the lateral load capacity of the frame with two energy dissipation walls was improved by 38.3%, and the initial lateral stiffness increased by 1.78 times, while the post yield lateral stiffness increased by only 20% to 30%; the energy dissipation capacity at different damage states increased by 10% to 175%, while the lateral deformation capacity was basically the same. The energy dissipation mechanism of the RC frame-HPFRC energy dissipation wall structure includes the energy dissipation caused by the deformation of the wall, the slipping at the connections of the upper and lower ends of the wall with the frame beams, and the deformation of the RC frame. The effective stiffness coefficients of the RC frame and the HPFRC energy dissipation wall at the peak load are 0.11 and 0.13, respectively.



中文翻译:

新型钢筋混凝土耗能结构的抗震性能

高性能纤维增强混凝土(HPFRC)由于其高拉伸延展性和多次细裂纹发展而成为理想的消能材料。将HPFRC消能墙安装在钢筋混凝土(RC)框架中,以形成新的RC框架-HPFRC消能墙抗震结构。设计并构造了两个半比例尺RC框架-HPFRC消能墙标本。进行了准静态测试,以研究破坏机理,变形性能,刚度退化和能量耗散性能。分析了RC框架-HPFRC消能墙在峰值荷载下的有效刚度。测试结果表明,RC框架-HPFRC消能墙结构可以达到“大地震后可修复”的抗震设防目标。与具有一个消能墙的RC框架相比,具有两个消能墙的框架的侧向承载能力提高了38.3%,初始侧向刚度提高了1.78倍,而屈服后侧向刚度仅提高了20%至30%;在不同破坏状态下的能量耗散能力提高了10%至175%,而横向变形能力基本相同。RC框架-HPFRC消能墙结构的消能机理包括:壁的变形,壁的上下端与框架梁的连接处的滑移,壁的变形引起的能量消散。 RC框架。RC框架和HPFRC消能墙在峰值载荷下的有效刚度系数分别为0.11和0.13,

更新日期:2020-09-22
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