摘要
近年来,围绕大跨度空间结构的风场特性研究、风振研究逐渐成为土木工程学科的热点研究方向,虽然取得了不少成果,但大多是建立在数值模拟分析基础上,少量学者进行了风洞试验研究。虽然风洞试验可以方便地模拟不同工况条件下的风环境和结构风振响应,但在真实建筑与模型相似比问题上又会使试验结果与真实数据之间存在一定误差,鉴于此,通过实测手段采集到了大跨度空间结构屋盖上方的风速、风向和风压数据,并基于实测数据,对其风荷载的湍流强度、积分尺度、阵风因子、风压分布、风速风向联合分布等指标进行了细致分析,分析结果真实可靠。
Recently, the study of wind field characteristics and wind induced vibration about long-span spatial structures has become the hot spot of the civil engineering. Even a lot of achievements have obtained, which is mostly based on numerical simulation and a few research on wind tunnel test, the test results of which are a little different from the real data due to ratio of similitude even though wind tunnel test can simulate different wind load conditions and wind induced vibration response. The paper analyzed turbulent intensity, gust factors, wind pressure distribution, joint distribution of wind speed and direction based on the measured data of wind speed, wind direction and wind pressure from above the roof of the long-span spatial structure. The analysis results explained well the characteristics of wind field and had very important significance to the research on wind induced vibration.
出处
《钢结构》
2018年第1期23-27,17,共6页
Steel Construction
基金
国家自然科学基金应急管理项目(41641023)
江西省科技支撑项目(20133BBG70099)
江西省青年基金(20144BAB2160014)
江西省教改课题(JXJG-12-18-18)
江西省科技项目(GJJ151125)
2015年国家(江西省)大学生创新创业训练计划资助项目(201511319013)
关键词
大跨度空间结构
风荷载
联合概率分布
long-span spatial structure
wind load
joint probability distribution
