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通过对3个小跨高比超高韧性水泥基复合材料连梁和1个钢筋混凝土连梁试件的低周反复加载试验,分析连梁试件的破坏形态、滞回性能和钢筋应变等性能,研究连梁跨高比变化对连梁抗震性能的影响。研究结果表明:小跨高比超高韧性水泥基复合材料连梁试件由于较好的韧性,有从脆性向延性转变的趋势,超高韧性水泥基复合材料连梁试件的滞回曲线呈反S形,比钢筋混凝土连梁试件的滞回曲线更为饱满,试件中各种钢筋能够达到屈服状态,超高韧性水泥基复合材料能改善连梁抗震性能,满足工程设计要求。
Through the low-cycle repeated loading test of three small span high-ratio ultra-high toughness cement-based composite beams and one reinforced concrete beam specimen, the failure morphology, hysteretic behavior and steel bar strain of the beam specimens were analyzed , The effect of the beam-span ratio on the seismic performance of the coupled beam is studied. The results show that due to good ductility, the beam-to-beam specimens with small span ratio ultra-high toughness cementitious composites tend to change from brittleness to ductility. The hysteresis curves of the ultra-high toughness cementitious composite beam specimens The anti-S shape is more full than the hysteresis curve of the RC beam specimens. All kinds of steel bars in the specimen can reach the yield state. The ultra-high toughness cement-based composites can improve the seismic performance of the beam and meet the engineering design requirements.