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首页> 外文会议>Structural Engineers Association of California(SEAOC) Convention; 20050928-1001; San Diego,CA(US) >The Need to Control Axial Load In Moment Frame Columns In Reinforced Concrete High-Rise Buildings Subject to Seismic Loading
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The Need to Control Axial Load In Moment Frame Columns In Reinforced Concrete High-Rise Buildings Subject to Seismic Loading

机译：钢筋混凝土高层建筑受地震荷载作用时控制框架柱轴向荷载的需要

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摘要

This paper emphasizes the significance of controlling axial compressive load in moment frame columns in the seismic design of high-rise reinforced concrete buildings. The current prescriptive code provisions (UBC 97[1], ACI 318[2], etc.) do not have specific guidelines to deal with this issue. This design issue deserves more attention than before because of the recent boom of high-rise residential buildings in major cities in California. The axial compressive load in frame columns located at the ends of frames caused by seismic overturning may increase significantly in moment frames with high aspect ratio (height to length ratio). The increase of seismic induced axial load is the result of accumulation of frame beam shear force associated with beam hinging. The detrimental effects of high axial load in the frame columns on the frame behavior are high-lighted by existing test results of columns and beam-columns joints. Several procedures of estimating the demand of axial load in frame columns during a major seismic event are provided and discussed. The variation of column axial load is highlighted through the analysis of an example high-rise moment frame. Recommendations of controlling column axial load through design to avoid the detrimental effects on the frame behavior are provided. In addition, moment curvature analysis is conducted on a column section with constant high axial load to confirm the adequacy of column design.
机译：本文强调了在高层钢筋混凝土建筑抗震设计中控制弯矩框架柱轴向压缩荷载的重要性。当前的规范性代码规定（UBC 97 [1]，ACI 318 [2]等）没有专门的准则来处理此问题。由于最近加州主要城市的高层住宅建筑热潮，这一设计问题比以往更加值得关注。在具有高纵横比（高长比）的弯矩框架中，由地震倾覆引起的位于框架端部的框架柱中的轴向压缩载荷可能会显着增加。地震引起的轴向载荷的增加是与梁铰接有关的框架梁剪力积累的结果。框架柱和梁柱节点的现有测试结果突显了框架柱中高轴向载荷对框架行为的有害影响。提供并讨论了在重大地震事件中估算框架柱轴向载荷需求的几种方法。通过分析示例高层弯矩框架，突出显示了柱轴向载荷的变化。建议通过设计来控制柱的轴向载荷，以避免对框架性能产生不利影响。另外，在具有恒定高轴向载荷的圆柱截面上进行弯矩曲率分析，以确认圆柱设计是否足够。

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