[1]王峰,郑晓东,熊川,等.覆面施工脚手架抗风设计[J].长安大学学报(自然科学版),2020,40(5):56-65.
　WANG Feng,ZHENG Xiao dong,XIONG Chuan,et al.Windresistant design of the clad construction scaffolding[J].Journal of Chang’an University (Natural Science Edition),2020,40(5):56-65.
点击复制

覆面施工脚手架抗风设计()
分享到：

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第40卷
期数:
2020年5期
页码:
56-65
栏目:
桥梁与隧道工程
出版日期:
2020-09-15

文章信息/Info

Title:
Windresistant design of the clad construction scaffolding
作者:
王峰; 郑晓东; 熊川; 李加武
1. 长安大学 公路学院，陕西 西安 710064； 2. 东京工艺大学 建筑学系，厚木 神奈川 2430297；3. 广东省高等学校结构与风洞重点实验室，广东 汕头 515063
Author(s):
WANG Feng;  ZHENG Xiaodong;  XIONG Chuan;  LI Jiawu
1. School of Highway, Changan University, Xian 710064, Shaanxi, China； 2. Department of Architecture，Tokyo Polytechnic University，Kanagawa 2430297， Atsugi City， Japan； 3. Key Laboratory of Structure andWind Tunnel of Guangdong Higher Education Institutes, Shantou 515063, Guangdong, China
关键词:
土木工程; 风荷载; 风洞试验; 脚手架; 抗风设计
Keywords:
civil engineering;  wind loads;  wind tunnel experiment;  scaffolding;  wind resistance design
文献标志码:
A
摘要:
为了分析覆面施工脚手架的风荷载特性，结合已有研究成果，并考虑最不利情况，以使用100%挡风率覆面结构的脚手架为研究对象，开展脚手架布置形式、建筑开孔率和周边建筑物风干扰效应等参数影响下的风洞试验。通过刚体模型测压试验，测得各工况下脚手架覆面结构表面上的风压时程，分析作用在其结构上的风压特性及其变化规律。结合试验分析和数值计算脚手架整体平均风力系数，并与现行的中国和英国规范建议值进行对比。建立脚手架结构的有限元模型，利用风洞试验测得的风压时程进行加载分析，得到各工况下脚手架连墙件的内力响应时程。估算各工况下所有连墙件中的最大极值拉力，计算阵风荷载因子并分析脚手架布置形式对其影响规律。研究周边建筑对作用在连墙件上最大极值拉力的风干扰效应，计算周边建筑物在不同位置时和不同脚手架布置形式下的干扰因子。综合分析结果，并给出覆面施工脚手架的抗风设计建议。研究结果表明：在所有试验工况下，最大正平均风力系数为1.41，最大负平均风力系数为-1.51，超过了中国和英国规范的最大建议值1.3；半包围布置脚手架的脉动风效应显著，阵风荷载因子最大值可达4.1，若脚手架布置形式为全包围，最大阵风荷载因子为2.7；当干扰建筑物位于脚手架结构正前方时的干扰效应尤为显著，最大荷载增量可达66%。
Abstract:
To study the wind loads characteristics acting on clad construction scaffolding were in wind tunnel experiment. The past researches and the most unfavorable condition were considered, a floortype scaffolding with the 100% solidity ratio cladding was selected as the prototype. Effects of scaffolding geometry, building openings and interference effects of a neighboring building were studied. The rigid models were made to collect the wind pressure time histories acting on the surface of the cladding of scaffolding in wind tunnel, and the wind pressure distributions and characteristics were studied. Mean wind force coefficient for the entire scaffolding was calculated based on the data processing and experiment analysis, and the comparison was made among the Chinese standard, British standard. Finite element model was established and analyzed with the wind loads collected in wind tunnel experiment. The reaction force time histories acting on the ties between the scaffolding and building were calculated. The largest peak tensile forces and the gust loading factors were estimated for different scaffolding geometries. The interference effects of a neighboring building on the largest peak tensile force on tie members were studied. The interference factors were calculated for different neighboring building locations and scaffolding geometries. The suggestions for the windresistant design of the clad construction scaffolding were proposed based on the analysis results. The results show that the largest positive and negative mean wind force coefficients are 1.41 and -1.51, respectively, which are larger than the max value 1.3, which recommended by the Chinese and British standards. The largest gust loading factor is 4.1 due to fluctuating wind effect under the condition that the building is partially enclosed by scaffolding. The largest gust loading factor is 2.7, when the building is fully enclosed by scaffolding. When the neighboring building is located in front of the measuring scaffolding, the increment of wind loads may reach to 66%. 2 tabs, 9 figs, 30 refs.

相似文献/References:

[1]姚兆明,毛 芬,李 哲,等.动态空心圆柱剪切仪模拟复杂应力路径能力[J].长安大学学报(自然科学版),2012,32(05):71.
　YAO Zhao-ming,MAO Fen,LI Zhe,et al.Capacity analysis of dynamic hollow cylinder shear apparatus simulating complicated stress path[J].Journal of Chang’an University (Natural Science Edition),2012,32(5):71.
[2]王瑀,马如进,涂熙.考虑风偏角影响的大跨径拱桥横向风荷载试验[J].长安大学学报(自然科学版),2011,31(05):38.
　WANG Yu,MA Ru-jin,TU Xi.Test on transversal wind load effect of long-span arch bridge with influence of skew wind[J].Journal of Chang’an University (Natural Science Edition),2011,31(5):38.
[3]李晓光,吕 晶,刘云霄.高岭土类煤矸石的热活化性能[J].长安大学学报(自然科学版),2013,33(02):63.
　LI Xiao-guang,LU Jing,LIU Yun-xiao.Pozzolanic activity of thermal activating coal gangue with kaolin clay composition[J].Journal of Chang’an University (Natural Science Edition),2013,33(5):63.
[4]张豫川,辛明静,王亚军.堆载法对浅层平板载荷试验的影响[J].长安大学学报(自然科学版),2013,33(03):55.
　ZHANG Yu-chuan,XIN Ming-jing,WANG Ya-jun.Effect of piling-up weights on shallow plate load test[J].Journal of Chang’an University (Natural Science Edition),2013,33(5):55.
[5]王社良,樊禹江,陈　琪,等.基于新型摩擦滑移隔振装置的框架模型地震响应[J].长安大学学报(自然科学版),2014,34(03):92.
[6]王志滨,谢恩普,陈　靖. ＣＦＲＰ-方钢管混凝土压弯构件的滞回性能[J].长安大学学报(自然科学版),2014,34(06):91.
[7]张效忠,姚文娟,程泽坤,等.负压贯入式多仓筒式结构施工阶段沉降[J].长安大学学报(自然科学版),2015,35(01):91.
　[J].Journal of Chang’an University (Natural Science Edition),2015,35(5):91.
[8]明　锋,李东庆. 压力作用下冻结粉质粘土的水分迁移特征[J].长安大学学报(自然科学版),2015,35(03):67.
[9]杜　强,卫　婧,吕　晶,等.以岩棉为芯材的SIPs力学性能试验研究[J].长安大学学报(自然科学版),2016,36(04):66.
　DU Qiang,WEI Jing,LU Jing,et al.Experiment on mechanical properties of rock wool cored SIPs[J].Journal of Chang’an University (Natural Science Edition),2016,36(5):66.
[10]宋朝阳,纪洪广,张月征,等.碎石地基强夯加固机制与加固效果试验[J].长安大学学报(自然科学版),2016,36(06):69.
　SONG Zhao-yang,JI Hong-guang,ZHANG Yue-zheng,et al.Gravel foundation dynamic consolidation mechanism and experiment on consolidation effects[J].Journal of Chang’an University (Natural Science Edition),2016,36(5):69.

更新日期/Last Update: 2020-10-12