海岛温室结构抗风设计中基本风压取值方法  

Method of the Reference Wind Pressure in the Design of Greenhouse Structures in Island Areas

作　　者：雷隽卿[1] 蒋秀根[1] 李保明[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第6期1106-1110,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家十一五科技支撑计划项目(2008BADC4B03);中央高校基本科研业务费专项基金项目(2009-3-11)

摘　　要：目的研究结构抗风设计中影响基本风压值计算的主要因素,以及海岛温室结构抗风设计中的基本风压取值的方法.方法以北京市和海口市为例,采用不同的重现期和时程间距,计算与风速相应的风压值,确定海岛地区温室结构合理的基本风压.结果在风压-风速计算模型的基础上,根据重现期与风速的关系,计算了不同时程、不同重现期对应的风压值.海岛地区温室结构基本风压值计算中,取荷载重现期为50 a,时程为1 min基本风速为61.12 m/s,相应的基本风压值为2.21 kPa.结论重现期和时程的选取对基本风压值有较大地影响.具体地区的基本风压应该根据统计的气象条件选择合理的重现期,利用时程、风速、风压的换算关系进行计算.The primary influencing factors of the reference wind pressure value computation are studied,and the method of the reference wind pressure in the design of greenhouse structures in island area is also discussed.Taking Beijing,Haikou for example,wind pressure values corresponding to different wind speeds are calculated by considering different return periods and time intervals,and the reasonable reference wind pressure is obtained in this paper.Based on the model of wind pressure-wind speed and the relationship between return period and time interval,the reference wind pressure of the greenhouse structures in different return period and time interval is calculated.In the calculation,the reference wind pressure of greenhouse structure in island area is 2.21 kPa when the return period is 50 a,time interval is 1min,and reference wind speed is 61.12 m/s.The result indicates that return period and time interval have significant effects on the reference wind pressure.Based on the practical weather condition of a region,the reference wind pressure can be calculated by using the correlations between wind speed,wind pressure and time interval with a constant return period.

关 键 词：海岛地区 温室结构 时程 基本风压 

分 类 号：TU311.2[建筑科学—结构工程]