钢结构建筑风灾及防治

风灾对钢结构建筑产生的经济损失居各种自然灾害之首.通过对钢结构建筑在风灾中的破坏形式和原因进行分析,风灾导致破坏的主要原因为瞬时风荷载过大造成围护结构或附属结构破坏、梁柱构件节点破坏、基础向上位移过大及主体结构倒塌破坏等,并提出了在设计时考虑阵风系数、围护结构采用可靠连接、加强柱脚与基础的连接,增加结构整体刚度及加强施工质量管理等防治措施.

Prevention and Control of Windstorm Disaster to Steel-Structured Architecture

The economic losses to steel-structured architecture by windstorm rank first in those by all kinds of natural disasters.According to analyses on the destruction forms and causes of steel-structured buildings in wind hazards,the leading causes of destructions are excessive instantaneous wind loads incur damages to exterior-protected construction or accessory structure,damages to beam-column component joints,excessive upward displacement of foundation and collapse of major structure.This paper presents relevant prevention and control measrues,such as taking into consideration gust coefficients in design,adopting dependable joints for exterior-protected construction,strengthening connections between column base and foundation,enhancing the whole rigidity of structure and energizing construction quality management.