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提出了一种应用于联肢剪力墙体系的新型钢连梁,称之为双阶屈服消能钢连梁,并且在此基础上提出了基于小震消能的双阶屈服钢连梁联肢剪力墙体系的抗震设计方法。该新型钢连梁由两部分并联而成,分别是发生剪切屈服的核心板梁和发生弯曲屈服的外套箱形梁。在小震作用下,剪切屈服板梁进入塑性,发挥消能减震作用,弯曲屈服梁保持弹性从而保证结构的整体刚度。在中震及大震作用下,剪切屈服梁和弯曲屈服梁同时进入塑性,发挥更大的消能作用,使主体结构免遭过大的地震损伤。在合理考虑第1阶屈服力和第2刚度与第1刚度比的基础上,提出了针对双阶屈服钢连梁联肢剪力墙体系的小震消能减震设计方法.根据该方法设计了一个20层的双阶屈服消能钢连梁联肢墙结构,最后通过弹塑性时程分析验证了该方法的合理性。
A new type of steel beam connected to the shear wall system is proposed, which is called a double-girder yielding steel beam. On the basis of this, a two-stage yielding steel beam with small energy dissipation is proposed. Seismic Design Method of Shear Wall System. The new steel beam connected in parallel by two parts, respectively, is the occurrence of shear yielding core plate girder and bending yield jacket box beam. Under the action of minor earthquakes, the shear yielding beam will enter the plasticity and play the role of energy dissipation and cushioning, and the curved yielding beam will maintain the elasticity so as to ensure the overall rigidity of the structure. Under the action of moderate earthquakes and large earthquakes, the shear yielding beam and the curved yielding beam enter into plasticity at the same time, exerting greater energy dissipating effect and protecting the main structure from excessive earthquake damage. Based on the reasonable consideration of the first-order yield strength, the second stiffness and the first stiffness ratio, a design method for reducing energy dissipation of small earthquakes by small-amplitude seismic response for two-order yielding steel coupled beam-shear wall system is proposed. According to this method, A 20-story double-tie yield-energy beam with steel beam structure is proposed. Finally, the method is verified by elasto-plastic time-history analysis.