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以大跨度简支梁式渡槽为对象,研究了流固耦合对其纵向地震响应的影响。试验表明流固耦合对渡槽纵向位移地震响应影响明显,说明纵向流固耦合作用不可忽视。其次,在渡槽有水的情况下,采用附加水质量方法的计算结果会有比较大的误差,应该充分考虑到流固耦合的影响。另外,在设计中可用无水情况作为渡槽纵向抗震的控制工况。
Taking the long-span simple-supported beam aqueduct as an example, the influence of fluid-structure interaction on its longitudinal seismic response is studied. The experiment shows that the fluid-solid coupling has obvious influence on the seismic response of the aqueduct, which shows that the longitudinal fluid-structure interaction can not be neglected. Secondly, if there is water in the aqueduct, the calculation result of the additional water quality method will have a relatively large error, and the influence of the fluid-solid coupling should be fully taken into consideration. In addition, anhydrous conditions can be used in the design of the aqueduct as a longitudinal seismic control conditions.