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为研究内置聚氯乙烯管材(PVC管)约束高强混凝土短柱的抗震性能,设计了2个新型约束高强混凝土短柱试件和3个传统约束高强混凝土短柱(普通箍筋约束高强混凝土、型钢高强混凝土以及内置钢管约束高强混凝土)对比试件进行低周反复加载试验。研究表明:所有约束高强混凝土短柱试件的破坏形态均为剪切斜压破坏;内置型钢、钢管以及PVC管约束高强混凝土试件较普通箍筋约束高强混凝土试件的滞回曲线饱满、极限变形大,其中内置PVC管试件随着PVC管径的增大,耗能及延性会劣化,但仍能满足结构抗震变形要求(μ≥3);采用内置型钢、钢管以及PVC管的措施能增强高强混凝土的抗震耗能及变形能力。
In order to study the seismic behavior of short columns with high strength concrete confined by polyvinyl chloride pipe (PVC pipe), two new types of confined high-strength concrete short column specimens and three traditional confined high-strength concrete short columns (ordinary stirrups constrained high-strength concrete, High-strength concrete and built-in steel tube confined high-strength concrete) comparative test specimens for low cycle repeated loading test. The results show that the failure modes of all HSS specimens are all shear baroclinic failure. The hysteretic curves of HSC specimens with built-in steel, steel tube and PVC-tube confined high-strength concrete specimens are more than those of conventional HSS specimens, Large deformation, which built-in PVC pipe specimens with the PVC pipe diameter increases, energy consumption and ductility will deteriorate, but still able to meet the requirements of structural seismic deformation (μ ≥ 3); using built-in steel, steel and PVC pipe measures can Enhance the seismic energy dissipation and deformation capacity of high-strength concrete.