往复荷载作用下矩形钢管混凝土压弯构件承载力计算

Calculation of bearing capacity of concrete filled steel rectangular hollow sectional compression-bending members under cyclic loading

本文基于往复荷载作用下矩形钢管混凝土压弯构件的实验结果,比较了国内外比较典型的设计规范(程),包括英国BS5400(1979)、美国ACI318-99(1999)和AISC LRFD(1999)、日本AIJ(1997)、欧洲EC4(1994)、中国GJB4142 2000(2001)和福建省地方标准(送审稿),及本文数值方法在计算往复荷载作用下矩形钢管混凝土压弯构件承载力的差异。结果表明,在进行往复荷载作用下矩形钢管混凝土压弯构件承载力计算时,各种计算方法获得的承载力都偏于安全,其中,数值计算结果与实验结果最接近,GJB4142 2000(2001)的计算结果与实验结果吻合程度稍差,ACI318-99(1999),EC4(1994)和福建省地方标准(送审稿)的计算结果比实验结果约低20%,而BS5400(1979)、AISC LRFD(1999)和AIJ(1997)的计算结果比实验结果总体上低30%以上。本文结果可供进行矩形钢管混凝土结构设计时参考。

Based on the experimental results of concretefilled steel rectangular hollow sectional compressionbending members subjected to cyclic loading,this paper compares the difference of design methods in different codes,including BS5400(1979,England),ACI 318-99(1999,American),AISCLRFD(1999,American),AIJ(1997,Japan),EC4(1994,Europe),GJB41422000(2001,China),Local Code of Fujian Province(Examination Draft,China) and the numerical method in this paper.It is demonstrated that all design codes can reasonably evaluate the bearing capacity,and the results tend to be safe,GJB41422000 (2001) results are some what conservative,ACI318-99(1999),EC4(1994) and Local Code of Fujian Province(Examination Draft) results are lower than the test results approximately 20 percentage.However,BS5400(1979),AISCLRFD(1999) and AIJ(1997) are lower than the test results more than 30 percentage.The results in this paper may be referenced in practical engineering.