预损混凝土柱角钢加固抗震性能试验研究

Experiment Study on Seismic Behavior of Pre-damaged RC Column Strengthened with Angle Steel

工程中经常采用外包角钢法对混凝土柱进行加固,通过对比角钢加固后的预损加固柱和未损对比柱之间的试验现象和数据结果,对两类试件的抗震性能及破坏机理进行探讨,以试验结果为基础对加固后预损柱的力学行为进行数值模拟。研究结果表明,角钢加固预损柱最终因根部角钢的拉断或压曲导致破坏,该加固方法可较大程度地提高试件承载能力,同时也具有良好的延性性能。

Reinforced concrete column strengthened with angle steel is often used in strengthening engineering. By the comparison of experimental phenomena and data, the seismic behavior of predamaged RC column strengthened with angle steel and intact RC column are analyzed. Based on the experimental results, the mechanical behavior is simulated with finite element method. The research results indicate that RC column strengthened with angle steel have good ductility, while not lose high load bearing capacity. The failure characteristic of strengthened RC column is induced by angle steels stretched or buckling fracture.