方矩形钢管混凝土抗弯性能研究及规范对比

Experimental investigation and code comparison on flexural bearing capacity of concrete-filled rectangular steel tubes

对国内外研究钢管混凝土具有代表性的规范进行了研究,并通过7根填充高强灌浆料的方矩形钢管混凝土受弯构件的试验研究,分析了它们在不同高宽比、钢管壁厚条件下的抗弯承载力及抗弯刚度,并将试验结果与日本AIJ(1997)、欧洲EC4(1996)、中国CECS159(2004)等规范的计算结果进行了比较。结果表明,日本AIJ规范安全储备最高,相应造价也要提高,DBJ规范和试验值比较接近,工程使用比较经济,并有足够安全储备,而其他三个规范介于二者之间。

In Seven flexural members of rectangular steel tubes filled with high strength grouting are experimental studied in order to investigate those mechanical properties. Furthermore, the flexural bearing capacity and stiffness are investigated on condition that the different height - to - breadth ratio and tube thickness, and these results are compared with the criterion~ calculate results of Japan AIJ （1997） ,Europe EC4（1996）, China CECS159：2004 （2004） etc. It shows that the criterion Japan AIJ is safest, the criterion DBJ is close to the test and have good economic engineering application and enough safety stock, and the other three criterions lie between the former two.