钢框架-偏心支撑结构消能梁暗置侧向支撑设计

CONCE.ALED I ATERAL BRACE OF ENERGY DISSIPATED LINK BEAM IN ECCENTRICALLY BRACED STEEL FRAME

在钢框架-偏心支撑结构中,针对钢结构住宅等建筑中不能接受常规消能梁侧向支撑的情况,设计了一种在消能梁段端部的楼板内设置型钢连接件及暗梁组成的暗置侧向支撑。有限元模拟分析表明,在规范规定的消能梁段下翼缘侧向水平荷载的作用下,该消能梁暗置侧向支撑能显著减小消能梁的扭转变形和侧向弯曲变形;在考虑消能梁上局部楼板失效的情况下,暗置侧向支撑也能提供消能梁合适的扭转约束刚度。通过某工程的原位静荷载试验,验证了该暗置支撑对消能梁发挥的预期侧向支撑作用。

In the eccentrically braced steel frame structure,a concealed lateral support was designed where conventional lateral support of energy dissipation beams cannot be accepted in buildings such as steel residential buildings.This concealed lateral support was composed of steel connectors and concealed beams in the floor slab at the end of the energy dissipation beam.Finite element simulation analysis shows that under the lateral horizontal load on the bottom flange of the energy dissipation beam section specified in the specification,the concealed lateral support of the energy dissipation beam can significantly reduce the torsional deformation and lateral bending deformation of the energy dissipation beam;When considering local floor failure on the energy dissipation beam,concealed lateral supports can also provide appropriate torsional restraint stiffness for the energy dissipation beam.The expected lateral support effect of the concealed support on the energy dissipation beam was verified through in-situ static load tests of a steel residential buildings.