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基于一榀钢结构植筋加层框架和一榀碳纤维布节点加固的植筋加层框架的1/3缩尺模型进行低周反复荷载试验,对采用无机锚固材料植筋加层后框架的破坏形态、滞回曲线、刚度退化、位移延性和耗能能力等抗震特性进行研究。试验结果表明:高强早强水泥基无机锚固材料在植筋结构上可以很好地满足工程对其力学性能的要求;使用无机锚固材料植筋技术,对既有混凝土框架结构进行钢结构加层后,结构整体抗震性能较好;使用碳纤维布材料对植筋节点进行加固后,加层框架的破坏机制由混合铰破坏转为梁铰破坏,结构的延性、耗能能力等抗震性能的提高较为明显。
The low-cycle cyclic loading test was carried out on a 1/3 scale model based on a steel bar anchorage plus steel frame and a carbon fiber reinforced anchor reinforcement plus frame, Shape, hysteresis curve, stiffness degradation, displacement ductility and energy dissipation capacity of the earthquake resistance characteristics of the study. The results show that the cement-based inorganic anchoring materials of high strength and early strength can meet the engineering requirements of the mechanical properties of the anchorage structure well. Using the anchorage technology of inorganic anchorage materials, after the steel structure is added to the existing concrete frame structure , And the overall seismic performance of the structure is better. After reinforcing the anchorage node with carbon fiber cloth material, the failure mechanism of the reinforced frame is changed from hybrid hinge failure to beam hinge failure, and the improvement of seismic performance such as ductility and energy dissipation of the structure is obvious .