钢管混凝土基本构件承载力的设计计算——各国规程比较(Ⅰ)  

Design Calculation of Concrete Filled Steel Tubular Beam-Columns-World Code Comparison(I)

作　　者：韩林海[1] 陶忠[1] 尧国皇[1] 杨有福[1] 

机构地区：[1]福州大学土木建筑工程学院

出　　处：《建筑钢结构进展》2002年第3期47-55,共9页Progress in Steel Building Structures

摘　　要：简要介绍了美国LRFD(1994)、日本AIJ(1997)、欧洲 EC4(1996)和中国 CECS28:29(1992)、DL/T5085-1999(1999)、GJB(2001)设计规程中有关圆形截面钢管混凝土(以下简称圆钢管混凝土)、方形截面钢管混凝土(以下简称方钢管混凝土)和矩形截面钢管混凝土(以下简称矩形钢管混凝土)基本构件计算方法的特点,并将以上所述各类方法的计算结果和搜集到的试验结果(圆钢管混凝土包括256个轴压、12个纯弯及106个压弯构件,方钢管混凝土包括184个轴压、15个纯弯及147个压弯构件,矩形钢管混凝土包括75个轴压、8个纯弯及20个压弯构件)进行了对比和分析。结果表明,上述各设计规程均能较好地计算构件的承载力,且计算结果偏于安全。其中,DL/T5085-1999和GJB(2001)的计算结果与试验结果最为吻合,CECS28:29(1992)、LRFD(1994)、AIJ(1997)和EC4(1996)的计算结果整体上偏于安全分析结果还表明,当采用我国《钢-混凝土组合结构设计规程》(DL/T5085-1999)和国家军用标准《战时军港抢修早强型组合结构技术规程》(GJB)对钢管混凝土压弯构件进行承载力设计时,构件的可靠度指标一般均大于3.2,基本上能满足对延性破坏构件规定的可靠度指标(即β=3.2±0.25)要求。本文的研究成果可供有关钢管混凝土工程设计时参考,本期刊登该文的第一部分。Design methods of concrete filled steel tubular beam-columns in different codes, including LRFD (1996, American), AIJ(1997, Japan), EC4(1996. Europe), CECS28:29(1992,China),DL/T5085(1999,China),GJB(2001, China) are introduced respectively in this paper, the calculating results are compared with those of tests (concrete filled circular steel tubes including 256 axial loaded members, 12 pure bending members and 106 compression-bending members, concrete filled square steel tubes including 184 axial loaded members, 15 pure bending members and 147 compression-bending members, concrete filled rectangle steel tubes including 75 axial loaded members, 8 pure bending members and 20 compression-bending members). The analytical results demonstrate that all design codes can reasonably evaluate the bearing capacity, however and tend to safety, DL/T5085(1999) and GJB(2001) are better than the others, CECS28:29(1992),LRFD(1996), AIJ(1997) and EC4(1994) are somehow conservative. Reliability analytical results show that concrete filled steel tubular beam-columns based on the DL/T5085(1999) and the GJB(2001) designing method may basically satisfy the reliability index, i.e. β=3.2±0.25, . that are demanded for ductile member, and β>3.2 in general. The conclusions in this paper may be referred for practical engineering.

关 键 词：钢管混凝土 轴压 纯弯 压弯 承载力 可靠度 

分 类 号：TU391[建筑科学—结构工程]