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基于“风压脉冲”的大跨屋盖结构极值风压估计方法研究
陈龙1,王丛菲1,武岳1,2,刘海峰1
摘 要

(1 哈尔滨工业大学建筑设计研究院, 哈尔滨 150090; 2 哈尔滨工业大学土木工程学院, 哈尔滨 150090)

[摘要]通过少量样本实现结构极值风压的概率估计一直是结构风工程领域的研究热点。对此,借鉴改进“独立风暴”法,发展了基于“风压脉冲”的极值风压估计方法,然后结合平面屋盖和球面屋盖的多次采样风洞试验,对基于“风压脉冲”的极值风压估计方法与改进“独立风暴”法进行比较。结果表明,基于“风压脉冲”的极值风压估计方法通过较小容量样本即可建立起相对精确的目标概率模型,获得较为准确的极值估计结果。将基于“风压脉冲”的极值风压估计方法应用于实际工程大跨屋盖结构的极值风压估计中,验证了此方法的可行性和有效性。

[关键词]极值风压; 风压脉冲; 改进“独立风暴”法; 小容量样本; 风洞试验

中图分类号:TU312+-1文献标识码:A文章编号:1002-848X(2018)12-0085-07

 

Method for estimating extreme wind pressure on large-span roof structure based on“wind pressure pulse events”

Chen Long1, Wang Congfei1, Wu Yue1,2, Liu Haifeng1

(1 The Architectural Design and Research Institute of HIT, Harbin 150090, China; 2 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

Abstract:Probability assessment of extreme wind pressure on structure with small sample size has been one of hot research issues in structural wind engineering. Based on“Modified Independent Storms Method”, an estimate method on extreme wind pressure pulse was proposed. Then, combined with the multiple sampling wind tunnel tests of the flat roof and the spherical roof, the extreme wind pressure estimation method based on“wind pressure pulse”was compared with the improved“Modified Independent Storms Method”. The results show that extreme wind pressure estimation method based on“wind pressure pulse”can establish a relatively accurate target probability model with small sample size and obtain a more accurate extreme value estimation result. The extreme wind pressure estimation method based on“wind pressure pulse”was applied to estimation of the extreme wind pressure of the large-span roof structure of a real engineering, and the feasibility and effectiveness of this method were verified.

Keywords:extreme wind pressure; wind pressure pulse; Modified Independent Storms Method; small sample size;  wind tunnel test

 

作者简介:陈龙,硕士,工程师,Email: havingtoday2007@126.com。

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