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对4种波纹钢板(CSP)涵洞的动力放大系数(DAFs)进行了试验研究。给出了静力和动力荷载下现场试验的结果。动力荷载下的位移和应变均高于静力试验。基于上述两种方法确定DAFs。在第一种方法中,可以从静力试验中直接获得结构的静力响应。在第二种方法中,可对涵洞的动态响应进行筛选,得到结构的静态响应。为使静态值的DAFs不存在较大误差,采用过滤法对涵洞的动态响应进行筛选。与第一种方法相比,误差不超过3%。位移的DAFs为1.116～1.260,应变的DAFs为1.105～1.293。DAFs的主要影响因素有涵洞的跨度、土壤覆盖层厚度和车速。研究得到的结论有助于评估CSP涵洞的动力放大系数和承载率。
The dynamic amplification factors (DAFs) of four kinds of corrugated steel (CSP) culverts were studied. The results of field tests under static and dynamic loads are given. Displacement and strain under dynamic load are higher than static test. DAFs are determined based on the above two methods. In the first method, the static response of the structure can be obtained directly from the static test. In the second method, the dynamic response of the culvert can be screened to obtain the static response of the structure. In order to make the DAFs of static value have no big error, the dynamic response of culverts is filtered through the filtering method. Compared with the first method, the error does not exceed 3%. The displacement of DAFs was 1.116 ~ 1.260 and the strain of DAFs was 1.105 ~ 1.293. The main influencing factors of DAFs include culvert span, soil cover thickness and vehicle speed. The conclusions obtained from the study are helpful to evaluate the dynamic amplification coefficient and bearing capacity of CSP culverts.