钢管混凝土短柱极限承载力可靠度分析  

RELIABILITY ANALYSIS OF ULTIMATE BEARING CAPACITY OF CONCRETE-FILLED TUBULAR STEEL STUB COLUMNS

作　　者：余志武[1] 贺飒飒[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《工程力学》2006年第11期139-144,共6页Engineering Mechanics

基　　金：国家自然科学基金重点资助项目(50438082)

摘　　要：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)对圆钢管混凝土轴压短柱的极限承载力进行了可靠度校准。结果表明,钢管混凝土构件的可靠指标随着混凝土强度等级的提高而提高,随着钢材强度、含钢率及套箍指标的提高而降低;此外钢材种类、荷载组合以及荷载效应比等也对钢管混凝土构件可靠指标有一定程度的影响。按照建议的分项系数值,能较好的满足《建筑结构可靠度设计统一标准》可靠指标的要求。The second moment of first order method （JC method） recommended in Unified Standard for Reliability Design of Building Structures （GB 50068-2001） is applied to analyze the reliability of concrete-filled tubular steel stub columns. It can be concluded that the reliability indexes increase with the increasing strength grade of concrete, reduce with the increase of strength of steel, steel ratio, and casing hoop steel coefficient. Material of steel, load combinations and specific value of loads etc. also influence the reliability index to a certain extent. The results fit Unified Standard for Reliability Design of Building Structures well with the separate coefficient suggested by this paper.

关 键 词：钢管混凝土 短柱 极限承载力 可靠性分析 一次二阶矩验算点法 

分 类 号：TU311.2[建筑科学—结构工程] TU318