Dynamic Responses of Sliding Isolation Concrete Rectangular Liquid Storage Structure with Limiting Devices Under Bidirectional Earthquake Actions

摘要

There is no lack of destructions of concrete liquid storage structures in the previous earthquake, and concrete rectangular liquid storage structures (RLSSs) are widely used in all kinds of engineering fields, so it is significant to study energy dissipation method aiming at structural responses and wave height. An energy dissipation method combination of sliding isolation and limiting-device is proposed for concrete RLSS, considering fluid- structure interaction, simplified and numerical models of a concrete RLSS with displacement-limiting devices are established. The dynamic responses of sliding isolation concrete RLSS with limiting devices under bidirectional earthquake actions are studied, parameter analysis is conducted, and seismic decrease coefficient is used to evaluate the reduction effect of sliding isolation on concrete RLSS. The results show that damping effect of sliding isolation with limiting devices on concrete RLSS is significant, and the dynamic responses under horizontal bidirectional earthquake actions are obviously higher than that of unidirectional earthquake action. The smaller the friction coefficient is, wall tensile stress and wave height are more reduced; in the premise of keeping the structural displacement within the limit, the limiting-device diameter should be smaller; liquid height mainly affects wall tensile stress and structural displacement. When the friction coefficient and limiting-device diameter are designed reasonably, seismic decrease coefficients corresponding to wall tensile stress and wave height are all large enough. Therefore, the proposed energy dissipation method is of great significance for the prevention and control of the common two types of failure modes (wall cracking and liquid overflow) of concrete RLSSs.