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采用无线测力鞋垫实测了24人次372条跑步荷载,计算了每条时程所对应的单自由度系统的加速度反应谱,取每位测试者所有的计算反应谱曲线的包络线为其代表谱线,在分析所有代表谱线特点的基础上提出了设计反应谱的形式及其数学表达式,包含六个部分:三个平台段以及它们之间的连接线。由试验数据的分析确定了不同阻尼比和保证率下各部分设计谱参数的取值,并讨论了结构跨度、跑步步距、高阶振型和边界条件对反应谱的影响,提出了不同谱代表值之间的转换关系。该文给出了设计反应谱的详细使用步骤并通过工程实例验证了其可行性。
Using wireless force measuring insoles, we measured 372 running loads of 24 persons and calculated the acceleration response spectrum of single degree of freedom system corresponding to each time course. Taking the envelope of all the calculated response spectrum curves of each tester as their representative Based on the analysis of the characteristics of all the representative spectral lines, this paper presents the form of the design response spectrum and its mathematical expression, which consists of six parts: three platform segments and their connection lines. Based on the experimental data, the parameters of design spectrum under different damping ratios and guaranteed rates were determined. The influence of span, running step, high-order modes and boundary conditions on the response spectra were discussed. Different spectral representations The relationship between the conversion. This paper gives the detailed steps of designing the response spectrum and verifies its feasibility through an engineering example.