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通过3个算例,对采用人字形无粘结内藏钢板支撑剪力墙(即人字形防屈曲支撑)的防屈曲支撑框架结构的抗震性能进行对比分析,以探讨支撑屈服后超强和被撑梁跨中竖向支点作用的有无对支撑跨横梁抗震性能的影响。结果表明,3个算例的框架梁在多遇地震下均能保持弹性,且被撑梁的最大竖向挠度均出现在撑点两侧。罕遇地震下,3个结构中支撑屈服后被撑梁的最大竖向挠度均出现在撑点位置。考虑超强但不考虑支点作用设计的结构中框架梁塑性发展程度较小,而不计超强但考虑支点作用设计的被撑梁塑性发展严重,且横梁的挠度较大,导致层间的两根支撑因承受较大的竖向力而使拉、压支撑的轴向应力-应变曲线明显不对称,不利于支撑受力。
Through the three examples, the anti-seismic performance of the buckling-restrained frame structure with herringbone-shaped, non-bonded steel plate-supported shear walls (ie herringbone buckling brace) Influence of Vertical Bezels in Beam Bracing on Seismic Performance of Cross Beam Strengthened by. The results show that the three examples of the frame beam can maintain the elasticity under the earthquake, and the maximum vertical deflection of the girder appears on both sides of the support point. Under the rare earthquakes, the maximum vertical deflection of the girder supported by the three structures after yielding appears in the position of the anchor point. Considering the super but not considering the design of the structure of the fulcrum, the plasticity of the frame beam is relatively small, while the plasticity of the brace beam, which is not super but the fulcrum design is seriously developed, has large deflection of the beam, resulting in two layers Due to the support of the larger vertical force, the axial stress-strain curve of the tension and compression support is obviously asymmetric, which is not conducive to supporting the force.