CAJ | 학술논문

基于<建筑结构可靠度设计统一标准>(GB50068-2001),利用一次二阶矩法(JC法)对钢骨一钢管高强混凝土轴压长柱的极限承载力进行了可靠度分析,研究了可变荷载组合类型、荷载效应比、混凝土强度等级、钢管壁厚、钢骨截面面积、钢材屈服强度及长细比对组合柱承栽力可靠指标的影响.分析结果表明,在工程常用长细比范围内,各公式的可靠指标均能满足规范对延性构件可靠度指标的要求;在所研究参数范围内,长柱的可靠度指标随荷载组合和荷载效应比的变化而变化,随混凝土强度等级的提高而增大,随钢管壁厚的增加而有所降低,钢骨截面面积对长柱的可靠指标无明显影响,同时,钢材屈服强度和长细比对各公式可靠指标的影响各不相同.
기우<건축결구가고도설계통일표준>(GB50068-2001),이용일차이계구법(JC법)대강골일강관고강혼응토축압장주적겁한승재력진행료가고도분석,연구료가변하재조합류형、하재효응비、혼응토강도등급、강관벽후、강골절면면적、강재굴복강도급장세비대조합주승재력가고지표적영향.분석결과표명,재공정상용장세비범위내,각공식적가고지표균능만족규범대연성구건가고도지표적요구;재소연구삼수범위내,장주적가고도지표수하재조합화하재효응비적변화이변화,수혼응토강도등급적제고이증대,수강관벽후적증가이유소강저,강골절면면적대장주적가고지표무명현영향,동시,강재굴복강도화장세비대각공식가고지표적영향각불상동.
The first degree second order moment method (JC method) recommended in Unified Standard for Reliability Design of Building Structures (GB50068--2001) was applied to analyze the reliability of steel reinforced high-strength concrete filled steel tubular slender columns. Several performances were studies,which were the influences of different load combinations, specific values of loads, strength grades of concrete, thickness of steel tube, area of cross-section of structural steel, steel yield strength and slenderness ratio on the reliability of the composite column. It was found that, when the slenderness ratios were within common range, the reliability indexes of the proposed formulae satisfied the demand of GB50068-2001 for plastic material on the whole. And it was concluded that the reliability index varied with the load combination and specific value of loads. The reliability index increased with the increase of concrete strength grade and decreased with the increase of steel tube thickness. Furthermore, steel yield strength and slenderness ratio had different influences on the reliability indexes.