钢筋混凝土偏压构件承载力各国规范算法比较

Comparison on calculation methods for load bearing capacity of reinforced concrete members in codes of various countries

为进一步研究钢筋混凝土偏压构件的承载力计算方法,利用收集的试验资料,采用中国《混凝土结构设计规范(GB 50010-2010)》、《混凝土结构设计规范(GB 50010-2002)》、《公路钢筋混凝土及预应力混凝土桥涵设计规范(JTG D62-2004)》进行计算,发现部分试件采用中国规范计算结果与试验值的偏差超过20%。进一步通过算例,分别采用中国规范和美国《Building Code Requirements For Structural Concrete(ACI 318-05)》、欧洲《Eurocode 2:Design of Concrete Structures(EN 1992-1-1:2004)》规范进行计算,发现在构件计算长度相同的情况下,各规范的计算结果存在较大差异。另外,各规范在构件的计算长度取值方面,也存在一些区别。建议进一步开展钢筋混凝土偏压构件的承载力计算方法的研究。

For further research on the load bearing capacity calculation of eccentrically compressed reinforced concrete members, Code for Design of Concrete Structure （GB50010_2010）, Code for Design of Concrete Structure （GB50010-2002） and Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts （JTG D62-2004） are adopted to calculate the collect- ed experimental data in documents. It was found that the maximum deviation between the test results and the calculated values is greater than twenty percent. Chinese code and Eurocode 2：Design of Concrete Structures （EN 1992-1-l：2004 ） as well as Building Code Requirements For Structural Concrete （ACI 318-05） are adopted for further calculation. It was shown that the calculated results are very different from one another. Moreover, the codes from different countries are diverse in the i- dentification of effective length for the members. It is suggested that in-depth studies should be carried out for the load bearing capacity of the eccentrically loaded reinforced concrete members.