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近年来,由强风、暴雪等极端天气导致的结构破坏倒塌事件屡有发生,如何应对新的气候条件对建筑结构的挑战成为工程界普遍关心的问题.本文以2007年辽宁省发生的56年未遇暴雪灾害为背景,对辽宁省内8个主要城市近50年的雪荷载实测值进行了统计分析,利用极值I型概率分布模型对规范雪荷载取值问题进行了探讨;还结合一个在此次雪灾中破坏的网架结构,进行了破坏原因分析和工程加固设计,对同类工程的设计雪荷载取值和除雪措施提出了建议.
In recent years, the structural failure and collapse caused by the extreme weather such as strong wind and Blizzard often occur, and how to deal with the challenge of the new climate conditions to the building structure has become a common concern in the engineering field.This paper takes 56 years in Liaoning Province in 2007 In the light of the snowstorm disaster background, the statistic analysis of the snow load in the eight major cities in Liaoning province for the past 50 years was carried out. The extreme value I probability distribution model was used to investigate the problem of the normalized snow load value. In addition, The destruction of the grid structure in the snowstorm, the cause of damage analysis and engineering reinforcement design, the design of similar projects snow load and snow removal measures are proposed.