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钢梁的极限承载性能极大地影响着钢框架的整体性能。主要的响应参数是转动能力和极限抗弯承载力。前者来自地震作用下通过结构的整体能量耗散性能获得的对局部延性的需求,而后者则需要在抗震设计中成功运用等级标准来获取抗弯强度。因此,对于抗震设计的应用来说,根据钢构件的延性和强度来对其进行双重分类是最合适的方法。目前,现代的国际设计规范是根据型钢的分类来对结构进行塑性设计和抗震设计,但有所误导地着重以局部屈曲为主要的应变-弱化效应。即使科技文献中提供了预测非均匀弯曲下钢构件的极限承载性能的各种方法,仍应对其进行进一步研究,因为最终结果和各种横断面的形状会受到高参数的影响。因此,在科技文献中介绍了一种新的试验方案,其能通过挑选过的﹑合适的﹑局部长细比不同的试验样本进行数据集成,从而处理单调和循环加载下许多不同的横截面类型(H型截面,工字型截面,方管形管截面,矩形管截面)。最后对得到的数据结果进行研究讨论。
The ultimate bearing capacity of steel beams greatly affects the overall performance of the steel frame. The main response parameters are rotation capacity and ultimate flexural capacity. The former comes from the demand for local ductility obtained by seismic energy dissipation through the overall energy dissipation of the structure, while the latter requires the successful application of grading criteria in seismic design to obtain flexural strength. Therefore, for seismic design applications, it is the most suitable method to classify steel members according to their ductility and strength. At present, the modern international design code is based on the classification of structural steel to plastic design and seismic design of the structure, but misleading to focus on local buckling as the main strain - weakened effect. Even though the scientific literature provides various ways of predicting the ultimate bearing capacity of steel members under non-uniform bending, further studies should be conducted on the final results and on the shape of the various cross-sectional shapes subject to high parameters. Therefore, a new experimental protocol has been introduced in the scientific literature that integrates data from selected test samples by selection, fit and slenderness to handle many different cross-sectional types under monotonic and cyclic loading (H-section, I-section, square tube cross-section, rectangular tube cross-section). Finally, the data obtained results to discuss.