基于随机风作用的直立锁边金属屋面系统损伤评估方法  

Damage Assessment Method for Standing Seam Metal Roof System under Ran-dom Wind Loads

作　　者：雷崇[1] 周兵[1] 刘文豪 陆怡雯 周臻[2] Lei Chong;Zhou Bing;Liu Wenhao;Lu Yiwen;Zhou Zhen(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Southeast University,Nanjing 210096,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《特种结构》2024年第1期91-96,共6页Special Structures

基　　金：国家重点研发计划项目(2022YFC3801800);铁四院院控科研项目(2022K056)。

摘　　要：为提出基于随机风作用的直立锁边金属屋面系统损伤评估方法,选取实际工程案例中某一截面的3块典型区域进行有限元分析,确定屋面系统在最大基本风压作用下的损伤等级。首先确定直立锁边屋面系统性能水准及量化指标,然后采用MATLAB软件模拟脉动风荷载,针对每一块典型区域随机生成了11条风速时程曲线并将其转化为风压荷载。而后在ABAQUS软件中建立典型区域的有限元模型并施加风压荷载,进行非线性动力时程分析,最后进行损伤评估。对比评估结果可知本文提出的损伤评估方法具有较好的合理性,可以用于评估直立锁边金属屋面系统在不同风压荷载作用下的损伤等级。This paper proposes a damage assessment method for the standing seam metal roof system based on random wind loads.The method involves selecting three typical areas of a cross-section in a practical pro-ject for finite element(FE)analysis to determine the damage level of the roof system under the maximum basic wind pressure.Firstly,the performance level and quantitative indicators of the standing seam metal roof sys-tem are determined.Then MATLAB software is used to simulate fluctuating wind loads,and 11 wind speed time-history curves are randomly generated for each typical area and converted to wind pressure loads.Next,the FE model of the typical area is established using ABAQUS software,and wind pressure load is applied to perform a nonlinear dynamic time history analysis.Finally,the damage assessment is conducted.Upon com-paring the results,it is evident that the damage assessment method proposed in this paper is highly rational and can be effectively employed to evaluate the damage level of a standing seam metal roof system under var-ying wind pressure loads.

关 键 词：随机风 直立锁边屋面系统 损伤评估 

分 类 号：TU231[建筑科学—建筑设计及理论]