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首页> 外文会议>NASCC - the steel conference incorporating the 2008 annual stability conference >IMPACT OF DIAPHRAGM BEHAVIOR ON THE SEISMIC DESIGN OF LOW-RISE STEEL BUILDINGS
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IMPACT OF DIAPHRAGM BEHAVIOR ON THE SEISMIC DESIGN OF LOW-RISE STEEL BUILDINGS

机译：横隔膜行为对低强度钢结构房屋抗震设计的影响

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Single-story buildings typically incorporate a steel roof deck diaphragm that is relied on to transfer lateral loads to the vertical bracing bents.Modern building codes allow engineers to use reduced seismic loads in design provided that the seismic load resisting system(SLRS)of the structure is adequately designed and detailed to withstand strong ground shaking through ductile response.This approach has been adopted by the North American model codes which typically include special provisions to achieve satisfactory inelastic seismic performance.The vertical braces of steel buildings are usually selected as the energy dissipating fuse element,while the diaphragm and other elements in the SLRS should be designed to have a capacity that exceeds the nominal resistance of the braces.Steel bracing members designed for compression inherently possess significant reserve strength when loaded in tension, which means that large brace tension loads must be considered in the design of the surrounding protected structural components.Capacity design seismic provisions have led to the need for much thicker roof deck panels and more closely spaced diaphragm connection patterns compared with past practice.This paper provides a description of the current US seismic design approach and an example as it is applied to a single-story building and its diaphragm.An overview of the related aspects of an on-going research project on the flexibility and ductility of the roof diaphragm in low-rise steel buildings is also included.
机译：单层建筑通常采用钢制屋顶平台隔板，将侧向荷载传递到竖向支撑弯曲处。现代建筑规范允许工程师在设计中使用减少的地震荷载，前提是结构的抗震荷载系统（SLRS）经过充分设计和详细设计，可以通过延性响应承受强烈的地面震动。此方法已被北美型号规范采用，通常包括为达到令人满意的非弹性抗震性能而进行的特殊规定。通常选择钢结构的垂直支撑作为消能保险丝元件，而SLRS中的膜片和其他元件的设计能力应超过支撑的标称电阻。设计用于压缩的钢支撑构件在承受拉力时固有地具有显着的储备强度，这意味着较大的支撑拉力环绕的设计必须考虑负载与过去的实践相比，容量设计的抗震规定导致对屋顶面板的厚得多的需求以及更紧密间隔的膜片连接方式的需要。本文提供了当前美国抗震设计方法的说明，并提供了一个示例。还包括正在进行的有关低层钢结构建筑中屋顶隔板的柔韧性和延展性研究项目相关方面的概述。

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