波浪荷载作用下桥墩码头动力响应分析

Dynamic Response Analysis of Bridge Pier Under wave Load

采用数学理论推导了规则波浪荷载与随机波浪荷载的计算表达式,并应用仿真数值模拟对波浪荷载作用下桥墩码头结构的动力响应进行了分析,研究了波浪的波高、周期、入射角、水深四个波浪参数对桥墩码头动力响应的影响。通过施加两种不同形式的极限波浪荷载,确定了桥墩主应力的分布规律以及危险区域。计算结果表明:波高和水深对桥墩码头的影响较大,但是波高的变化对桥墩的影响更为显著;周期对桥墩的影响有一定的局限性;入射角对桥墩码头影响最小;桥墩的最大主应力没有超过混凝土的抗拉设计强度,并富有一定的安全储备,桥墩是安全的。

In this paper rule of wave load and random wave load calculation expression was deduced by mathematical theory,and applied to the simulation numerical simulation under the action of the wave load. Through the change of the wave load factor,such as wave height,period,incidence angle and the depth,the rule of the dynamic response of a bridge pier was obtained. By applying two different forms of extreme wave load,the distribution of principal stress of the piers and the danger zone were determined. Calculation results show that the influence of wave height and water depth of bridge pier is great,but the influence of wave height is more significant; Cycle effect on the pier has certain limitations. Angle of incidence of bridge pier wharf minimal impact has minimal impact on bridge pier wharf structure. Piers of the maximum principal stress more than concrete tensile strength design,with safe reserve,so the bridge pier is safe.