可调节式挡水板在深水高桩码头中的减震效果

为研究水深度对高桩码头结构抗震性能的影响，明确地震作用下码头钢管桩的塑性发展与水深的关系，验证可调节式挡水板的减隔震效果，以典型钢管高桩码头为研究对象，使用ABAQUS软件建立直桩式高桩码头有限元模型，在不同类型及峰值加速度地震动作用下，通过设置挡水板并改变其倾斜角度，研究结构在远场长周期地震及直下型地震作用下挡水板调整的合理角度。研究结果表明：随水深增加，钢管桩码头在地震作用下的损伤程度也会随之增加，码头结构的抗震性能下降，设置挡水板可有效减小地震作用下结构的最大位移及钢管桩塑性率(最大曲率与屈服曲率的比值)；对于远场长周期地震作用，应将挡水板角度调整为45°~60°之间，对于直下型地震作用，若对码头面板位移无严格限制，可将挡水板角度调整到0°~60°范围，此时钢管桩结构塑性率小于破坏塑性率，但结构位移值较大，若使结构位移减小，应将挡水板角度保持在45°~60°之间。

Damping effect of adjustable baffle in deep-water high-pile wharf

In order to investigate the influence of water depth on the seismic performance of high-pile wharf structures, clarify the relationship between plastic development of wharf steel pipe piles and water depth under earthquake action, and verify the shock absorption and isolation effect of adjustable water retaining plates, the typical high-pile wharf was taken as the research object. The software ABAQUS was used to establish the finite element model of the straight piled high-pile wharf. Under the action of seismic ground motions with different types and peak ground accelerations, the reasonable angle of lower baffle adjustment of the structure on the ocean-type earthquake and the direct-type earthquake was studied by setting the retaining plate and changing its inclination angle. The research results show that the damage degree of the steel pipe pile wharf under the earthquake action increases as the water depth increases, and the seismic performance of the wharf structure decreases. The installation of water retaining plates can effectively reduce the maximum displacement of the structure and the plasticity ratio of steel pipe pile under the seismic actions. The pile plasticity improves the seismic performance of the high-piled wharf. For long-term earthquakes in the far field, the angle of the retaining plate should be adjusted to 45°-60°. For the direct earthquake action, if there is no strict restriction on the displacement of the wharf panel, the angle of the water baffle can be adjusted to the range of 0°-60°. At this time, the plasticity ratio of the steel pipe pile structure is less than the failure plasticity ratio, but the structure displacement value is larger. To reduce the structure displacement, the angle of the water baffle should be maintained at 45°-60°。