钢纤维高强混凝土框架边节点抗震性能-防灾减灾工程及防护工程专业论文.docxVIP

摘要 摘要 混凝土抗拉强度比较低，脆性大。随着强度的增加，这种特征更加明显。 如果将混凝土应用在框架节点等应力复杂区域，很容易开裂，其抗剪承载力和 抗震性能都很低。与普通混凝土结构相比，钢纤维混凝土结构的抗剪能力和抗 震性能明显提高。因此，综合钢纤维混凝土和高强混凝土的优点，研究钢纤维 高强混凝土桩架节点性能具有理论意义和实用价值。 本文通过钢纤维高强混凝土桩架节点的低周反复加载试验，初步分析了轴 压比、核心区配箍量、钢纤维掺盘及掺加范围对框架节点抗剪和抗震性能的影 响。并探讨在框架结构中，用制纤维取代核心区箍筋的可行性。主要内容如下: (1) 进行了 2 组共 5 个钢纤维高强混凝土桩架节点在低周反复荷载作用下的 拟静力实验，分析了轴压比、核心区配箍量、钢纤维掺最及掺加范围对裂缝的 影响，并研究了破坏形态。 (2)根据试验得到的框架边节点的滞???曲线，分析了各个概架节点的和能能 力，探讨了轴应比、核心匹配箍量、钢纤维掺盘及掺加范围对抗震性能的影响。 (3) 对框架节点进行受力分析，探讨了框架节点的抗裂及抗剪机理，提出 了钢纤维商强混凝土节点的受力模型。 关键词:钢纤维高强泪凝土概架节点抗震性能抗荫能力:  F Abstract Abstract Reinforc创 Concrete has a m司jor defect 伽at is weak in tension 附m份 and is very brittle. As the intensity increased，也is feature is more obvious. If applied in ωmplex 耐ess areas 阳ch as beam-column join饵，批 isωyωcrack， the shear capac抑制d seismic performance 缸e very low. Compar时 with ordinary concrete struc阳邸， the shear capacity and seismic perfonnance of steel fiber reinforced ωncrete have improved significantly. Therefore，ωnsid创ng the advantages of st佣1 fiber reinforcedωncrete and high strength ∞ncrete，伽ep臼fonnance research of steel fiber reinforcedωn口ete frame joint have important theoretical and practical value. 响lfOUgh a test including 侃侃1 fiber reinforc创 ωncrete frame joints under cyclic loading t，创t 伽川.thor analyses that four exp创mental parameters effect in specimens mechanics capability and seismic capacity.ηle p即ameters are axial ∞mpression ratio，volume and mixing 町ea of steel fib叽 volume of theωre area of stirrup. We also research if steel fiber rl叩lac臼 the feasibi1ity of stirrups in the ∞m M创.The main contents areωfol1ows: The paper carries out a test including 5 frame joints under cyclic loading. 叽le specimα18 are divided into 2 groups. We analyze the impact ofaxial load ratio， volume and mixing area of steel 胁时 volume of 伽∞re area of stírrup on 加 αack ，also study the failure mode. According to the Hysteretic curve of frame side joint from 阳阳st， we analyze 也e en，町gy dissipation capacity of each frame joint and paramet，缸s effect on th