摘要
针对中国典型轻型钢结构建筑,提出风灾易损性的概率分析方法。荷载概率模型考虑屋面板自身重力、围护结构风压、飞掷物冲击破坏,提出屋面板、墙面板、外门窗的抗风承载力概率模型,建议构件风灾破坏的判定准则,给出轻型钢结构的风灾破坏等级矩阵。使用蒙特卡洛模拟得到各类构件及建筑整体的超越破坏易损性曲线,针对某一典型轻型钢结构建筑进行模拟。研究结果表明:屋面板和外门窗的超越破坏概率高于墙面板超越破坏概率;为减少风灾破坏,应当优先选用利于抗风的屋面板型,进而提高外门窗的抗风性能,最后考虑增强墙面板的抗风性能。
A method of probabilistic wind vulnerability analysis for typical light-weight steel buildings in China was presented.The probabilistic load models took into account roof panel weight,wind pressures on components and cladding,and impact damage caused by wind-borne debris.The probabilistic resistance capacity models for roof panels,wall panels,external doors,and external windows were given.The failure criteria for various components were suggested,and the wind-induced damage state matrix for light-weight steel buildings was presented.The fragility curves of components and the whole building were obtained with Monte Carlo simulation.The simulation results of a typical light-weight steel building show that roof panels and fenestrations have greater damage probabilities of exceedance than wall panels.To mitigate the wind-induced damages,selecting a roof panel type superior in wind resistance should have priority,improving the resistance capacity of fenestrations is of secondary importance,and strengthening wall panels takes a third order of importance.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第9期3609-3618,共10页
Journal of Central South University:Science and Technology
基金
国家自然科学基金重大研究计划重点项目(90715040)
科技部国家重点实验室基础研究资助项目(SLDRCE08-A-03)
关键词
轻型钢结构
门式刚架
风灾破坏
易损性
概率模型
light-weight steel building
gabled frame
wind-induced damage
vulnerability
probabilistic model
