风雨耦合环境结构荷载与响应的分析及试验研究
发布时间：2019-01-09 12:44
【摘要】：采用理论分析及试验研究方法对风雨共同作用下的结构荷载与响应进行了研究。首先在确定风雨联合作用概率模型的基础上通过对降雨作用特性的分析,比较了雨滴冲击作用模型和空气密度等效变化模型对建筑结构等效静力的作用性能;其次,基于高精度风雨耦合荷载环境模拟试验设备,进行了风雨定常气动力荷载模型高频天平测力试验,研究了简单几何形体的风雨定常荷载变化规律;然后,采用二维悬挂系统测振试验方法,研究了风雨非定常气动力荷载模型及其结构振动响应特点;最后,对缆索承重桥梁拉索风雨激振现象进行耦合荷载环境参数精细化控制试验,揭示了拉索空间姿态、拉索动力特性、来流风速和不同雨强组合等条件对拉索风雨振的影响规律。
[Abstract]:The structural load and response under the combined action of wind and rain are studied by theoretical analysis and experimental study. Firstly, on the basis of determining the probability model of combined action of wind and rain, through the analysis of the characteristics of rainfall action, the effects of raindrop impact model and equivalent variation model of air density on the equivalent static behavior of building structure are compared. Secondly, based on the high-precision wind and rain coupling load environment simulation test equipment, the wind and rain steady aerodynamic load model high-frequency balance force measurement test is carried out, and the change law of the simple geometric body's wind and rain steady load is studied. Then, the unsteady aerodynamic load model of wind and rain and the characteristics of structural vibration response are studied by using two-dimensional suspension system vibration measurement test method. Finally, the wind and rain vibration of cable bearing bridge is controlled by coupling load environment parameter refinement control test, which reveals the spatial attitude of cable and the dynamic characteristics of cable. The effect of wind speed and different rain intensity combinations on the wind and wind vibration of cable is studied.
【作者单位】： 同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金资助项目(51178353;91215302;51222809;2013CB036300)
【分类号】：U441.3
本文编号：2405647
[Abstract]:The structural load and response under the combined action of wind and rain are studied by theoretical analysis and experimental study. Firstly, on the basis of determining the probability model of combined action of wind and rain, through the analysis of the characteristics of rainfall action, the effects of raindrop impact model and equivalent variation model of air density on the equivalent static behavior of building structure are compared. Secondly, based on the high-precision wind and rain coupling load environment simulation test equipment, the wind and rain steady aerodynamic load model high-frequency balance force measurement test is carried out, and the change law of the simple geometric body's wind and rain steady load is studied. Then, the unsteady aerodynamic load model of wind and rain and the characteristics of structural vibration response are studied by using two-dimensional suspension system vibration measurement test method. Finally, the wind and rain vibration of cable bearing bridge is controlled by coupling load environment parameter refinement control test, which reveals the spatial attitude of cable and the dynamic characteristics of cable. The effect of wind speed and different rain intensity combinations on the wind and wind vibration of cable is studied.
【作者单位】： 同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金资助项目(51178353;91215302;51222809;2013CB036300)
【分类号】：U441.3
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