Abstract Compared with the current popular performance-based design (PBD) method, the current research of scholars on structural performance as a PBD foundation is insufficient. By considering the failure process of a standing seam roof system as an example, the wind-resistant performance of a roof system is evaluated by studying the wind uplift failure mechanism. The deformation process of roof-system components is obtained using numerical simulations. The analysis shows that the interaction between the vertical plate and anti-wind clip occurs in three stages: from non-contact and no interaction to anti-wind clips restraint vertical plate deformation, and finally to vertical plates drive anti-wind clip rotation. The changes in the structural responses (seam displacement and contact stress) and damage during the failure process of the roof system are obtained through experiments. Analysis of the variation in the curve of the structural responses with the load shows that the increase in the structural responses also occurs in three stages. Combined with the damage sequence, the aforementioned three failure stages are found to correspond to three different damage stages. In the first stage, the roof system is in an elastic stage. Second, the roof system is in the yield stage, and curling undergoes partial separation, which results in an interspace that is adverse to roof waterproofing. In the third stage, permanent plastic deformation occurs in the roof system, which leads to roof ponding. It was observed that the three-stage failure process represents different performance levels of the roof system, and some results from this study can be used as a guide for the definition of roof-system performance level in the future.

中文翻译：

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基于性能设计的立缝屋盖系统风顶破坏机理研究

摘要 与目前流行的基于性能的设计（PBD）方法相比，目前学者们将结构性能作为PBD基础的研究还不够充分。以立缝屋面系统的破坏过程为例，通过研究风隆起破坏机理来评价屋面系统的抗风性能。屋顶系统部件的变形过程是通过数值模拟获得的。分析表明，立板与抗风夹的相互作用发生在三个阶段：从非接触和无相互作用到抗风夹抑制立板变形，最后到立板驱动抗风夹旋转。通过实验得到屋顶系统破坏过程中结构响应（接缝位移和接触应力）和破坏的变化。对结构响应曲线随载荷变化的分析表明，结构响应的增加也发生在三个阶段。结合损伤序列，发现上述三个失效阶段对应于三个不同的损伤阶段。在第一阶段，屋顶系统处于弹性阶段。其次，屋面系统处于屈服阶段，卷曲部分分离，产生不利于屋面防水的空隙。在第三阶段，屋顶系统发生永久塑性变形，导致屋顶积水。