Abstract
In recent years, existing quay walls have been expected to be reinforced against earthquakes for the purpose of effective utilization of the social capital. On the other hand, the seismic strengthening of existing quay walls needs huge budget, because high-priced ground improvement methods must be used for in-use quay walls. In the present study, the economical strengthening method of in-use quay walls was investigated by dynamic numerical analyses. The analyses showed that the proposed method by using a detached-pier style economically increased the seismic capacity. However, the response acceleration at the crane basement rail was too large to design the crane reasonably. Therefore, the dynamic cross-interaction behavior between the quay walls and the crane was investigated by changing the natural period of the crane in the numerical analyses, and this resulted that the response acceleration can be reduced by the effect of the dynamic cross-interaction behavior.
