文档介绍：厂房框架柱平面外稳定计算的几个问题陈绍蕃(西安建筑科技大学西安 710055) 摘要:厂房钢框架边柱的下段大都为单轴对称的实腹截面,《钢结构设计规范》(GB50017)规定,计算这类柱的平面外稳定时,稳定系数φ应考虑扭转效应的换算长细比确定。为此给出了计算这一换算长细比所需要的截面特性的计算公式。压弯构件平面外稳定计算涉及等效弯矩系数β tx,设计规范规定的系数取值, 对弯矩沿轴线变化的柱段有时过于保守;实腹的下段柱时常采用较薄的腹板,其宽厚比超出局部稳定允许的范围,此时如何计算柱段的平面外稳定,设计规范的规定有欠细致,对上述问题提出了改进建议。关键词:框架柱压弯构件单轴对称截面平面外稳定等效弯矩系数有效宽度 SOMEASPECTSOFCOLUMNOUT-OF-PLANEBUCKLINGINMILLBUILDINGFRAMES ChenShaofan (Xi′.&′an710055) Abstract:“Code forDesignofSteelStructures”(GB50017)stipulatesthat,whencheckingtheout-of-planebucklingofthesecolumns,the stabilityfactorφshallbedeterminedbytheequivalentslendernessratio,, tx, involvedinthecalculationofbeam-columnout-of-planebuckling,asspecifiedintheDesignCode,isoverconservativefor thelowercolumnportionisoftenquitethinsothatitswidth- out-of- connectionaswell. Keywords:framecolumn beam-column monosymmetricsection out-of-planebuckling equivalentmomentfactor effective