典型格构式结构风荷载及风致响应规范比较

发布时间：2018-01-02 23:14

本文关键词：典型格构式结构风荷载及风致响应规范比较　出处：《振动与冲击》2015年06期 　论文类型：期刊论文

【摘要】：对国内外四种常见格构式结构荷载规范中风荷载计算方法、关键参数取值等进行详细对比分析,以典型500 k V单回路酒杯型输电塔为例,将规范计算所得风荷载与风洞测力试验所测风荷载进行比较,计算结构的风致响应。对比分析发现,相同条件下(50年重现期)不同规范对同一输电塔结构的等效风荷载存在一定差异。随节段高度增加,我国规范GB50545的等效静力风荷载偏大。据规范计算所得风致响应值与据测力风洞试验计算结果吻合较好。由于我国规范未考虑重现期对线路影响,随线路安全等级提高,其等效静力风荷载可能会不安全。
[Abstract]:The calculation methods of stroke load and the values of key parameters of four common lattice structural load codes at home and abroad are compared and analyzed in detail. The typical 500kV single circuit wine cup transmission tower is taken as an example. The wind load calculated by the code is compared with the wind load measured by wind tunnel force measurement test, and the wind-induced response of the structure is calculated. Under the same conditions (50-year recurrence period), the equivalent wind loads of the same transmission tower structure under different specifications are different, and the height of the transmission tower increases with the increase of the section height. The equivalent static wind load of the code GB50545 in our country is on the high side. The wind induced response calculated according to the code is in good agreement with the calculated result of the wind tunnel test based on the measured force. The influence of the recurrence period on the line is not considered in the code of our country. The equivalent static wind load may not be safe as the line safety level increases.
【作者单位】：华北水利水电大学;同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金重点项目(50638010) 科技部国家重点实验室基础研究资助项目(SLDRCE08-A-03) 河南省教育厅科学技术研究重点项目(13A560691)
【分类号】：TU312.1
【正文快照】： 作为输电线体系主要承载部分—输电杆塔为复杂的空间高耸结构。其风损、风毁事故在世界各地频发[1-3]。大量格构式结构在强风作用下所遭破坏或功能失效表明,现有格构式结构设计理论存在一定缺陷。为保证结构安全稳定运行,需全面系统对格构式结构风荷载设计规范深入分析研究。

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