BRB屈曲约束支撑施工技术探索与实践

Exploration and practice of BRB buckling restrained brace construction technology

钢结构系统在现代建筑中,应用十分广泛,其中抗弯钢框架体系、支撑框架结构以及双重结构体系,是最为常见的几种形式。这些体系在建筑高度增加的情况下,往往面临结构相对变柔的问题,导致结构变形超过规范规定的侧移限值,需要进行相应的刚度增强措施。屈曲约束支撑(BRB)是一种特殊的支撑构件,它在受压时不会发生屈曲,而是通过一种特殊的结构设计,使核心支撑在受到压力时,能与受拉时一样发生屈服,从而能大量吸收输入整个体系的能量。这种支撑构件在建筑结构中,特别是在抗震性能要求较高的建筑中,有着广泛的应用。

Steel structure system is widely used in modern architecture,in which bending steel frame system,braced frame structure and double structure system are the most common forms.With the increase of building height,these systems often face the problem of relatively flexible structure,which leads to the structural deformation exceeding the limit of lateral displacement.Buckling-restrained brace(BRB)is a kind of special bracing member,which does not buckle under pressure,but through a special structural design,the core braces can yield under pressure as well as under tension,thus it can absorb a great deal of energy input into the whole system.This kind of supporting member is widely used in building structure,especially in the building with high seismic performance requirements.