低温环境下输电线铁塔的选材方法  

SELECTION METHOD OF STEEL MATERIALS FOR TRANSMISSION LINE TOWERS AT LOW TEMPERATURE

作　　者：王元清[1] 廖小伟[1] 张子富[2] 邢海军[2] 

机构地区：[1]土木工程安全与耐久教育部重点实验室清华大学土木工程系,北京100084 [2]中国电力科学研究院,北京100192

出　　处：《钢结构》2016年第7期60-62,41,共4页Steel Construction

基　　金：国家自然科学基金资助项目(51378289);高等学校博士学科点专项科研基金(20130002110085);国家电网公司科技项目(GCB17201300166)

摘　　要：为了选择适合寒冷地区的输电线铁塔钢材,降低因低温冷脆破坏带来的杆塔断裂事故。根据低温拉伸和冲击韧性试验结果,结合相关规范要求和低温塑性及韧性指标,给出了低温环境下铁塔钢管和角钢钢材的选材方法。通过工程选材算例,给出了输电线铁塔钢材的选材结果。结果表明:算例钢材的低温塑性和韧性指标均能基本满足要求;建议在寒冷地区优先采用Q420B钢管钢材。In order to select the steel materials which are applicable to cold areas and to avoid the fracture accident of transmission line towers induced by the cold brittle fracture,this paper provided the selection method of the steel tube and steel angle at low temperature according to the code requirements of low-temperature plastic index and toughness index.Then,the results of material selection for transmission line towers were given from an example of engineering practice. The results show that low temperature plastic index and toughness index of steel materials from the example could meet the requirements of the corresponding codes,and the priority should be given to the steel tube Q420 B in cold areas.

关 键 词：输电线铁塔 钢材 低温 塑性指标 韧性指标 选材方法 

分 类 号：TU511.3[建筑科学—建筑技术科学]