为得到合肥新桥国际机场航站楼钢结构屋盖中箱型曲梁构件的承载性能,以箱型曲梁部分为重点研究对象,采用千斤顶单拉加载的方式,进行了3个箱型曲梁模型的试验研究;试验测定了箱型曲梁模型宏观的荷载位移曲线、面外位移以及各关键位置的应变情况,得到了箱型曲梁构件预期的破坏形态和破坏模式,并建立了试验构件的有限元模型,将试验结果与有限元计算结果进行了对比和分析;通过3个试验构件不同形式的面外支撑,检验了支撑的效果;通过施加不同大小的初始缺陷,分析了初始缺陷对于转换节点构件承载性能的影响.结果表明:有限元计算有效地模拟了试验构件的承载性能,试验和有限元结果吻合较好,证明了设计的合理性和安全性.%To get the bearing behaviors of the curved girders,three model experiments were carried out under tensile force by way of a single jack.The load-displacement curve,out-plane displacement were measured,as well as the strain at the concerning positions.Target curves and expected failure mode of the experiment components were obtained.Finite element models were established.The bearing behaviors of the curved girders were simulated and the results of experiments and FEM were compared.By different types of out-plane supporters,different effects were obtained.The effects of different initial defects applied on the models were analyzed as well.The results show that the experiment results and FEM results agree well,and the design is reasonable and safe.
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