考虑支座缺陷的连续焊接不锈钢屋面抗风揭性能研究

Evaluation on Wind Uplift Resistance of Continuous Welded Stainless Steel Roof Considering Sliding Support Imperfections

摘要

为研究连续焊接不锈钢(CWSS)屋面系统的抗风揭性能和破坏行为,采用静态风揭试验和数值模拟相结合的方法,比较了有无滑动支座缺陷的 CWSS 屋面系统在失效模式和极限承载力方面的区别。 利用有限元方法模拟 CWSS 屋面系统的抗风揭响应,并基于验证后的模型进一步进行参数分析。 研究结果表明,初始支座缺陷会显著降低 CWSS 屋面系统的抗风揭性能,移除 1、2、3 个支座后极限风压分别降低 10. 7%、23. 3%、35. 7%。 降低屋面板宽厚比对屋面整体极限承载力影响不大,但能增加抗弯刚度;增加支座厚度可显著提高屋面系统的抗风揭性能。

Abstract

In order to investigate the wind uplift resistance and failure behavior of the Continuous Welded Stainless Steel ( CWSS) roof system, a combination method of static wind uplift test and numerical simulation was adopted to compare the differences in failure modes and ultimate bearing capacities of the CWSS roof system with and without sliding support imperfections. The wind uplift resistance response of the CWSS roof system was simulated using the finite element method, and further parametric studies were carried out based on the verified model. The research results show that the initial support imperfections can significantly reduce the wind uplift resistance of the CWSS roof system. When 1, 2, and 3 supports are removed, the ultimate wind pressure is reduced by 10. 7%, 23. 3%, and 35. 7%, respectively. Reducing the width-to-thickness ratio of the roof panel has little impact on the overall ultimate bearing capacity of the roof but can enhance the flexural rigidity. Increasing the thickness of the support can notably improve the wind uplift resistance of the roof system.

关键词

连续焊接不锈钢 / 风揭试验 / 滑动支座 / 数值模拟 / 参数分析

Key words

continuous welded stainless steel / wind uplift test / sliding support / numerical simulation / parametric study

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基金资助

浙江公司 2023 年依托工程基建新技术研究项目(SGZJQZ00JJJS2310864)

宁夏回族自治区重点研发计划项目(2025BEG02023)