防灾减灾工程学报2017，Vol.37Issue(5)：725-731,7.DOI:10.13409/j.cnki.jdpme.2017.05.005
开孔圆形截面空心桥墩水动力研究
Study on Hydrodynamic Characteristics of Circular Hollow Pier with Holes
摘要
Abstract
For the problem whether inner water has an impact on the hydrodynamic characteristics of circular hollow pier with holes,a numerical analysis model for pier-water coupling by ANSYS CFX was established.The dynamic characteristics and the dynamic response of the hollow pier with inner water under earthquake loading were studied.The results show that the inner water has great influence on dynamic characteristics.When the inner water depth is half the height of the hollow pier,the natural frequency of hollow pier is 25.08％ lower than that of the only outer water,and the natural frequency is reduced by 39.32％ with full water.As a result of pier vibration induced by earthquake,the inner water sloshing will increase the additional hydrodynamic force of the hollow pier,thus increasing the dynamic response of the structure (the increase rate of principal stress is 30.84 ％).The interaction between inner and outer water causes the local stress near the holes to increase by 9％.The benefit of inner water resistance to outer water pres sure of the hollow pier is etched away.In terms of the seismic action effect,it is not suitable for opening holes on the wall of hollow piers in deep water.关键词
空心墩/内部水/地震/动水力/动力响应Key words
hollow pier/inner water/earthquake/hydrodynamic force/dynamic response分类
建筑与水利引用本文复制引用
吴安杰,杨万理,赵雷..开孔圆形截面空心桥墩水动力研究[J].防灾减灾工程学报,2017,37(5):725-731,7.基金项目
国家自然科学基金项目(51678491)资助 （51678491）
