细晶高强钢筋混凝土梁柱组合体抗震性能试验研究

通过对细晶高强钢筋进行的材性试验表明,细晶高强钢筋有很好的屈服台阶,属于一种强度高延性好的增强筋材。参照现行混凝土结构规范设计了4个不同配筋率的细晶高强钢筋混凝土梁柱十字型组合体,并对这些试件进行低周反复荷载试验。测试试件从开裂到破坏的全过程及最终破坏形态,并给出荷载-位移滞回曲线、开裂荷载、极限荷载等重要数据。对数据分析得到细晶高强钢筋混凝土梁柱十字型组合体抗震性能的延性指标和耗能指标。研究表明,采用细晶高强钢筋混凝土梁柱十字型组合体,具有较好的抗震性能和耗能性能。

EXPERIMENTAL STUDY ON ASEISMATIC PERFORMANCE OF CONCRETE BEAM-COLUMN ASSEMBLIES REINFORCED WITH FINE GRAINED HIGH STRENGTH STEEL BARS

In this paper, the material testing of HRBF is firstly taken and its result shows this kind of steel bars posess obvious and sufficient yielding stage and affiliates to a good ductile reinforcing material. Secondly, a total of four specimens of concrete frame beam-column assemblies reinforced with different ratios of HRBF were designed referring to available concrete code. And then the testing of the specimens under cyclic reverse loading was implemented. The performance of concrete beam-column assemblies during the whole process from initial cracking to final failure was tested and such important data as cracking load, ultimate load and load-displacement hysteresis curve for each specimen were recorded and given. The ascismatic indexes for ductility and energy-dispersion of the assemblies were also gained on the basis of testing results. The conclusion from the investigation can be drawn that the concrete beam-column assemblies reinforced with HRBF exibit .good aseismatic performance and energy-dispersion performance.