高延性混凝土加固钢筋混凝土柱抗震性能试验研究

发布时间：2018-08-12 16:15

【摘要】：为研究高延性混凝土(HDC)加固混凝土柱的受力性能,设计了8个RC柱,采用HDC和高性能复合砂浆进行加固,通过低周反复荷载试验,研究其破坏形态、变形和耗能能力。试验结果表明:采用HDC围套加固混凝土柱,可对核心区混凝土形成较好的约束作用,破坏形态由脆性破坏向延性破坏转变,加固柱的承载力、延性和耗能能力都得到显著提高;HDC加固层能与混凝土较好地协调工作,可充分发挥HDC的高耐损伤能力,其加固效果明显优于高性能复合砂浆钢筋网加固;在HDC加固层配置钢筋网,可提高加固层对内部混凝土的约束作用,进一步提高加固柱的延性和耗能能力,但对其承载力的贡献较小;采用HDC围套式加固混凝土柱,可减轻竖向构件的损伤程度,提高其抗震性能。
[Abstract]:In order to study the mechanical behavior of high ductile concrete (HDC) reinforced concrete columns, 8 RC columns were designed and strengthened with HDC and high performance composite mortar. The failure pattern, deformation and energy dissipation capacity were studied by low cycle cyclic loading test. The test results show that the reinforced concrete columns with HDC girdle can form a good constraint on the core concrete, and the failure form changes from brittle failure to ductile failure, and the bearing capacity of strengthened columns can be improved. The ductility and energy dissipation ability of the HDC reinforced layer can be improved remarkably by coordinating with concrete, and the high damage resistance ability of HDC can be brought into full play, and the reinforcement effect is obviously better than that of high performance composite mortar reinforced concrete mesh reinforcement. The reinforcement net in the HDC strengthened layer can improve the restraint effect of the strengthened layer on the internal concrete, and further improve the ductility and energy dissipation ability of the strengthened column, but the contribution to the bearing capacity of the strengthened column is small. It can reduce the damage degree of vertical member and improve its seismic performance.
【作者单位】：西安建筑科技大学土木工程学院;广州市建筑科学研究院有限公司;
【基金】：国家自然科学基金项目(51578445) 西安市科技计划项目(CX13135-3)
【分类号】：TU375.3

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