Ji Koochul, Choi Hyok Chu, Kwon Kyungrok, Kong Jung Sik
Global Loss Control Center, Samsung Fire & Marine Insurance Co., Ltd., Seoul 04523, Korea.
Department of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea.
Materials (Basel). 2022 Apr 27;15(9):3163. doi: 10.3390/ma15093163.
In response to the increasing demands of high-technology industrial buildings, renovated standing seam metal roofs (SSMRs) are widely used in the construction of such buildings due to their superior performance regarding heat insulation and waterproofing. However, studies to identify realistic mechanical performance and structural defects in newly applied SSMRs are still limited due to their recent development. In our previous full-scale experiment, the ultimate failure of the roof under wind pressure corresponded to mid-clip failure rather than end clip failure and seam separation; therefore, in this study, the lab-scale experimental programs mainly focused on the mid-clip and the metal roof sheet. Here, the plastic saddle type of the SSMR was chosen as the lab-scale experiment specimen under various loading speeds and angled plastic saddle conditions. The JC material properties were calibrated against experimental results and simulated to predict the dynamic failure response of SSMRs. An additional experimental study was conducted to identify the effect of strengthening SSMRs with wind clips, which showed that 20.77% of the peak load was enhanced after reinforcing the SSMR with wind clips. On the basis of this result, the failure wind speed was computed according to ASCE 7-10 standards with the assumption of a wind clip installed on the corner and edge of the roof panel, indicating that the failure wind speed increased with the wind clip by about 6 to 7 m/s. The current research results suggest a methodology for enhancing the structural performance of renovated industrial building SSMRs.
为了满足高科技工业建筑日益增长的需求，翻新的直立锁边金属屋面（SSMRs）因其在隔热和防水方面的卓越性能而被广泛应用于此类建筑的建设中。然而，由于其应用时间较短，关于新应用的SSMRs实际力学性能和结构缺陷的研究仍然有限。在我们之前的足尺试验中，屋面在风压作用下的最终破坏对应于中扣失效而非端扣失效和接缝分离；因此，在本研究中，实验室规模的试验方案主要集中在中扣和金属屋面板上。在这里，选择了SSMR的塑料鞍型作为实验室规模试验的试件，研究了不同加载速度和斜角塑料鞍条件下的情况。根据试验结果校准了JC材料性能，并进行模拟以预测SSMRs的动态失效响应。还进行了一项额外的试验研究，以确定用防风夹加强SSMRs的效果，结果表明，用防风夹加固SSMRs后，峰值荷载提高了20.77%。基于这一结果，假设在屋面板的角部和边缘安装防风夹，根据ASCE 7-10标准计算了失效风速，结果表明，安装防风夹后失效风速增加了约6至7m/s。目前的研究结果提出了一种提高翻新工业建筑SSMRs结构性能的方法。
