阻尼耗能抗风装置对低矮双坡屋面风压影响研究  

Research on influence of wind-resistant damping devices on wind pressures of low-rise buildings with gable roof

作　　者：霍林生[1] 王银坤 何锴 李钢[1] 李宏男[1] HUO Linsheng, WANG Yinkun, HE Kai, LI Gang, LI Hongnan(State Key Lab of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024 ,Chin)

机构地区：[1]大连理工大学海岸与近海工程国家重点实验室

出　　处：《建筑结构学报》2018年第4期8-17,共10页Journal of Building Structures

基　　金：“十二五”国家科技支撑计划项目(2014BAL05B03);国家自然科学基金创新群体项目(51421064);中央高校基本科研业务费专项资金项目(DUT16TD03)

摘　　要：采用阻尼耗能抗风装置以减小强风对低矮双坡房屋的破坏,对无耗能抗风装置、设置有女儿墙及耗能抗风装置和仅有女儿墙3种屋面的村镇低矮房屋进行了风洞试验,以研究阻尼耗能抗风装置对低矮双坡屋面风压的影响。试验结果表明：耗能抗风装置对减小屋面的最不利负压效果明显,迎风屋面为主要破坏区域,如屋脊附近处、屋面与山墙接触边缘处等,平均负风压系数绝对值减小幅度可达50%;耗能抗风装置对于背风屋面的风压影响也较明显,平均负风压系数绝对值减小幅度最多可达15%。采用有限元软件对风场中低矮双坡屋面的风压进行了数值模拟,得到的屋面风压分布规律与风洞试验结果一致。This paper proposed a method using wind-resistant energy dissipation damper to reduce the wind-induced damages to low-rise buildings with gable roof. In order to study the influence of the wind-resistant energy dissipation devices on the wind pressures applied to the roof, wind tunnel experiments were carried out for the buildings with three types of roofs, namely, roof without energy dissipation devices, vertical-parapets with energy dissipation devices, and vertical-parapets without energy dissipation devices. The experimental results show that the wind-resistant energy dissipation devices can greatly reduce the worst negative pressure over the whole roof. The absolute value of mean negative wind pressure coefficients for the most vulnerable area of the windward roofs, such as that near the ridge and close to the conjunction between the roof and gable, can be decreased by 50 percent. The wind-resistant energy dissipation devices can also affect the wind pressures of the leeward roof area, in which the absolute value of mean negative wind pressure coefficients can be decreased by 15 percent. Finally, the wind pressures of low-rise buildings with gable roof in the wind field were numerically simulated using finite element software. The results show that the distribution of wind pressure on the roof is consistent with the results of wind tunnel experiments.

关 键 词：低矮房屋 耗能装置 风洞试验 数值模拟 平均风压 

分 类 号：TU352.203[建筑科学—结构工程] TU311.41