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现有的冷成型钢结构体系源于传统的木结构体系,在国外低层住宅中已得到广泛应用。本文首先将该体系通过改进扩展为多层冷成型钢结构体系,并提出相应的结构抗震性能设计准则。在对多层冷成型钢结构一定简化的基础上,提出了结构整体及标准层有限元建模方法。该方法可以考虑连接件的间距和滑移影响,尽可能真实地反映了结构在水平荷载下的工作性能。以6层住宅结构为例,利用本文有限元建模方法,分析了结构在风载以及地震作用下的抗侧性能,并给出设计建议。案例同时表明多层冷成型钢住宅结构具有类似框架-剪力墙结构的变形特点,即呈现反S型变形。此外,在保证施工质量的前提下,多层冷成型钢住宅结构可以具有足够的抗侧刚度,结构墙板可以替代传统的支撑系统。
The existing cold-formed steel structure system originates from the traditional wood structure system and has been widely used in low-rise residences abroad. In this paper, the system is extended to a multi-layer cold-formed steel structure system through improvement, and corresponding design criteria of seismic performance of structures are proposed. Based on the simplification of multi-layer cold-formed steel structure, the method of finite element modeling of whole structure and standard layer is put forward. The method considers the influence of the spacing and slippage of connectors and reflects the working performance of the structure under horizontal load as far as possible. Take the 6-storey residential structure as an example, this paper analyzes the anti-side performance of the structure under the action of wind load and earthquake, and gives the design recommendations. The case also shows that the multi-layer cold-formed steel residential structure has the deformation characteristics similar to those of the frame-shear wall structure, ie, it presents the inverse S-shaped deformation. In addition, under the premise of ensuring the quality of construction, multi-layer cold-formed steel residential structure can have sufficient lateral rigidity, structural wall panels can replace the traditional support system.