中马友谊大桥主桥墩钢吊箱压力实测数据分析

Analysis of field pressure data on steel cofferdam of main pier in China-Maldives Friendship Bridge

依托中马友谊大桥,主要开展主桥20号墩位处钢吊箱波流荷载实测研究。通过在钢吊箱外壁面布置36组压力传感器,得到了钢吊箱每个壁面上的压强分布。采用快速傅里叶变换(Fast Fourier Transform, FFT)和滤波方法,分离出波浪荷载和潮流荷载,通过对钢吊箱每个壁面进行压力积分,得到了钢吊箱波浪荷载,形成了一套适用于海上结构物波浪荷载实测及数据处理的方法,为后续CFD数值计算提供对比标准。

Relying on the China-Maldives Friendship Bridge, the wave and tide loads on No.20 steel cofferdam of main pier were measured in site. By laying 36 pressure sensors on the outer wall surface of the steel cofferdam, the pressure distribution on each surface of the steel cofferdam was recorded. The method of Fast Fourier Transform(FFT) and filtering were adapted to separate tide pressure and wave pressure. Through the integration of pressure on each wall surface of the steel cofferdam, the wave load on steel cofferdam were calculated and a set of methods suitable for the measurement and data processing of wave loads on offshore structures was formed, which provides a comparative standard for the future CFD simulations.