人行激励荷载作用机理的试验研究

Test Research on Mechanism of Pedestrian Excitation Loads

人行激励荷载引发的结构振动可能导致结构使用舒适性问题.利用识别的单步荷载落足曲线建立连续步行激励荷载时程曲线用于人行桥人致振动响应分析过程中,对于人行桥人致振动使用舒适性问题研究具有重要意义.利用多维测力台数据采集和分析系统进行行人步行过程中荷载数据采集工作,然后通过关键点荷载值多项式插值方式识别出六类人行荷载模式的落足曲线,对比了各种荷载模式下的单步落足曲线,最后建立了人行荷载峰值与步频间的具体函数关系式,给出了相应的拟合曲线.

The bridge vibration excited by the pedestrian load might induce the problem of the bridge comfort.This paper establishes the continuous walking excitation load curve for footbridge vibration response analysis by means of the identification of the single-step load curve,which is important for the research on the problem of comfort of the footbridge vibration.It also uses the multi-dimensional force platform data acquisition and analysis system to conduct the loading data collection during the pedestrian＇s walking,identifies six kinds of load curve by using the key point load value polynomial interpolation method,compares different kinds of single-step load curve,and finally establishes the specific function equation between the load peak and walking frequency and presents the corresponding fitting curve.