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Seismic Performance Evaluation of Modern Bare and Masonry-Infilled RC SMRF Structures

机译：现代裸露和砌体 - 潜入的RC SMRF结构的地震性能评价

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摘要

Improper execution of modern code-designed structures in many developing countries have resulted in significant deficient building stock; low strength of concrete, reduced reinforcement, inappropriate detailing of beam-column members, and lack of lateral ties in joint panels. Observations based on earthquake-induced damages and experimental studies conducted on such buildings have revealed significant vulnerability of beam-column joints of bare moment-resisting frame structures. Shake table tests were conducted on selected three 1 : 4 reduced-scale three-story reinforced concrete (RC) moment-resisting frames, including one bare RC frame and two masonry-infilled RC frames, having relatively lower bay width-to-height ratio. The models were tested under multilevels of seismic excitations using natural acceleration time history of 1994 Northridge and also free vibration tests, to acquire the models' dynamic characteristics, i.e., frequencies and elastic viscous damping, and seismic response parameters, i.e., roof displacement, interstory drift and interstory shear, and seismic response curves, in order to understand the role of masonry infill in the selected frames under moderate seismic actions. The inclusion of masonry infill avoided joint shear hinging of the frame. Additionally, the infill provided energy dissipation to the structure through masonry sliding over multiple cracks. This enabled the structure to control seismic displacement demand and resist relatively higher ground motions, yet limiting structural damages.
机译：在许多发展中国家的现代代码设计结构的不正确执行导致建筑物股票的显着缺乏;低强度的混凝土，减少加固，梁柱构件的不恰当细节，以及联合面板中的横向关系。基于地震诱导的损伤和在这些建筑物上进行的实验研究的观察揭示了裸脉冲框架结构的梁柱关节的显着脆弱性。摇动台测试在选定的三个1：4减小的三层钢筋混凝土（RC）力矩抵抗框架上进行，包括一个裸rc帧和两个具有相对较低的托架宽度与高度比。使用1994年Northridge的天然加速时间历史和自由振动试验的自然加速时间历史，在抗震激励的多尺寸下进行测试，以获取模型的动态特性，即频率和弹性粘性阻尼，以及地震反应参数，即屋顶位移，壁垒漂移和壁垒剪切，以及地震反应曲线，以了解在适度地震动作下所选框架中砌体填充在所选框架中的作用。包含砌体填充避免了框架的关节剪切铰接。另外，填充物通过在多个裂缝上滑动的砖石滑动来提供对结构的能量耗散。这使得结构控制地震位移需求并抵抗相对较高的地面运动，但限制结构损坏。

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  • 来源
    《Advances in civil engineering》 |2019年第14期|6572465.1-6572465.15|共15页
  • 作者

    Ahmad M. E.; Ahmad N.; Pervez S.; Iqbal A.; Khan A. Z.; Rahim M. E.; Hassan W.; Umer K.; Khan K.;

  • 作者单位

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

    UET Peshawar Dept Civil Engn Peshawar KP Pakistan;

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