摘要
为进一步了解水泥聚苯保温模壳混凝土柱的抗震性能,制作了单侧设置水泥聚苯保温模壳、周边设置保温模壳的 2 个混凝土柱试件,以及相应的 2 个普通混凝土柱对照试件,采用拟静力加载方式对各试件的抗震性能进行试验.试验中考虑不同混凝土柱截面尺寸、单侧设置保温模壳及四周设置保温模壳对混凝土柱抗震性能的影响,分析各试件的滞回性能、骨架曲线、延性、刚度退化、耗能能力以及破坏特征等.结果表明:水泥聚苯保温模壳可以延缓混凝土开裂,混凝土柱角先于保温模壳发生破坏,且保温模壳与混凝土柱交界面无损伤,模壳与试件协同受力,形成整体;单侧设置保温模壳的试件,其承载力、延性、累积耗能分别提高了 5.0%、6.0%、10.7%;周边布置保温模壳的试件,分别提高了 17.0%、26.0%、23.3%.在混凝土柱中设置水泥聚苯保温模壳不仅可以起到保温、隔热的作用,还可以显著提高结构的抗震性能.
Abstract
Two concrete column specimens with cement polystyrene insulation mold on one side and insulation mold around were made,and two corresponding ordinary concrete column control specimens were also designed.The seismic performance of each specimen was tested by quasi-static loading method,and its hysteretic performance,skeleton curve,ductility,stiffness degradation,energy dissipation capacity and damage characteristics were analyzed.The results showed that the cement poly phenyl thermal insulation mold could delay the concrete cracking,the concrete column angle was destroyed before the thermal insulation mold,and the interface between the thermal insulation mold and the concrete column was not damaged,and the mold and the specimen were stressed cooperatively to form a whole;The bearing capacity,ductility and cumulative energy consumption of the specimen with insulation mold shell on one side increased by 5.0%,6.0%,and 10.7%,respectively.The specimens with thermal insulation mold around them increased by 17.0%,26.0%,and 23.3%,respectively;Setting cement polystyrene insulation mold in concrete column can not only play the role of heat preservation and heat insulation,but also significantly improve the seismic performance of the structure.
NETL
NSTL
万方数据