The strength of concrete and steel decrease a lot after exposure to fire. As a result, the seismic performance of concrete-filled steel tubular (CFST) columns may be changed.
火灾后组成钢管混凝土的钢材和混凝土力学性能的降低，可能造成钢管混凝土柱抗震性能的改变。
The ductility of the tested columns decrease with the increase of concrete strength and width-to-thickness ratio. (2) 20 square steel tubed RC columns were tested under static axial compression.
以钢管的宽厚比、混凝土强度、钢管高宽比及试件有无纵筋为主要参数进行了20个方钢管约束钢筋高强混凝土轴压短柱的试验研究。
The ductility of the tested columns decrease with the increase of concrete strength and width-to-thickness ratio. (2) 20 square steel tubed RC columns were tested under static axial compression.
以钢管的宽厚比、混凝土强度、钢管高宽比及试件有无纵筋为主要参数进行了20个方钢管约束钢筋高强混凝土轴压短柱的试验研究。
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