摘要
对4片高宽比为2∶1的钢纤维部分增强混凝土剪力墙进行了低周反复荷载下的抗裂性能试验。通过对钢纤维混凝土剪力墙开裂的理论分析,建立了抗裂计算模型。结合普通钢筋混凝土剪力墙正截面开裂弯矩的计算方法及公式,提出了钢纤维部分增强混凝土剪力墙开裂荷载的计算模型,并针对钢纤维掺入不同层高提出了正截面受拉区钢纤维混凝土塑性影响系数计算公式。试验及计算结果表明,钢纤维部分增强混凝土剪力墙能显著地提高混凝土剪力墙的抗裂性能,改变钢纤维混凝土层高对剪力墙正截面开裂荷载的影响显著,且开裂荷载随层厚增大而提高。
An experimental study was carried out on the eross-section crack-resistant property of 4 steel fiber partially reinforced concrete shear walls under cyclic reverse load. Through the theoretical analysis of crack modes,the calculation model of cross-section crack resistant capacity was established. The calculation formulas of cross-section crack-resistant capacity were deduced, which were connected with that of steel fiber partially reinforced concrete shear walls. The results indicated that the steel fiber partially reinforced concrete shear-wall would reduce the fiber content and improve the crack resistance and the cracking load increased with the greater thickness of steel fiber reinforced concrete.
基金
教育部新世纪优秀人才支持计划资助项目(NCET-10-0125)
国家自然科学基金资助项目(51078333)
关键词
剪力墙
钢纤维
正截面抗裂性能
混凝土层高
shear walls
steel fiber
cross-section crack-resistance
thickness of steel fiber reinforced concrete
