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首页> 外文期刊>Bulletin of earthquake engineering >Haunch retrofitting technique for seismic upgrading deficient RC frames
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Haunch retrofitting technique for seismic upgrading deficient RC frames

机译：HA悬架改装技术用于地震升级缺陷RC帧

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摘要

Haunch retrofitting technique has been employed, primarily to stiffen the beam-column connections that controls the hierarchy of strength within the beam-column members, and avoid joint shear hinging of RC frame structures, subjected to earthquake imposed lateral loads. Shake-table tests were performed on a total of nine(09) 1:3 reduced scale two-story RC frames, including five(05) as-built and four(04) haunch retrofitted models, to develop structures' damage scale and obtain their seismic response parameters. A representative finite element based numerical model was prepared in SeismoStruct and validated against the experimental response. A suit of seven natural accelerograms were retrieved from the PEER NGA strong ground motions database and employed for incremental dynamic analysis of structural models,in order to derive seismic fragility functions for as-built and retrofitted structures. Vulnerability curves were derived for the structures, correlating the mean damage ratio with the seismic intensity. Uniform hazard curves, obtained for candidate cities in moderate and high hazard zones, were employed to derive the structures' loss exceedance curves for calculating the expected average annual loss. The net present value of the annual avoided repair cost was quantified, and critically compared with the retrofitting cost, to evaluate the viability of haunch retrofitting technique for seismic upgradation of deficient RC frame structures for risk mitigation.
机译：已经采用了HA统一改装技术，主要是加强控制光束柱构件内强度的层次结构的梁柱连接，并避免RC帧结构的联合剪切铰接，经受抗震施加的横向载荷。摇动表测试总共九（09）1：3减小尺度的两层RC帧，包括五（05）的竣工和四（04）个仓位改装模型，以开发结构的损伤量表并获得他们的地震反应参数。基于代表性的有限元的数值模型制备在地震分子中并验证了实验响应。从对等NGA强大的地面运动数据库中检索七种自然加入臂的套装，并用于对结构模型的增量动态分析，以导出适用和改装结构的地震脆弱功能。衍生脆弱性曲线对于结构，将平均损伤率与地震强度相关联。采用适度和高危险区中候选城市获得的均匀危险曲线，用于推导结构的损失曲线，以计算预期的平均年度损失。净目前的年度避免修复成本的价值与改装成本进行了规范，并统治性地比较，以评估HA统计改装技术对缺乏RC框架结构的地震升级的可行性，用于风险缓解。

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