大越浪下堤后建筑单体波浪冲击力计算方法

Calculation methods for impact force on building behind breakwater under massive wave overtopping condition

针对越浪水体对防波堤后方建筑单体冲击力缺乏理论计算公式的问题,结合地中海某油气港改扩建工程的二维物理模型试验结果,提出4种基于压力传感器测量数据的堤后单体平均波压力计算方法,并结合总力传感器结果与各种方法的计算结果进行对比分析。结果表明:越浪水体具有较高的动能,导致单个压力传感器的测量结果偏高,明显高于总力传感器结果;当试验设备受限时,可以通过均布压力传感器,取同一时刻下波压(不含负值)平均值的方式近似计算建筑单体迎浪面受到的总水平力;不同的波压平均值计算策略对总水平力的大小有影响,遍历全部测量结果计算得到的波压平均值较为合理,采取此计算策略得到的总水平力与总力传感器结果最为接近。

In response to the problem of the lack of theoretical formulae for calculating the wave overtopping impact force on a building behind the breakwater,combining with the two-dimensional physical model test results of a Mediterranean petroleum jetty expansion project,we propose four calculation methods of average wave pressure acting on the buildings behind the breakwater based on the pressure sensors data,and compare and analyze the results of the total force sensor with the calculation results of various methods.The results show that the high kinetic energy of the wave overtopping drops causes the measurement results of individual pressure sensors to be higher than those of the total force sensor.When the test equipment is limited,the total wave pressure on the building can be approximately calculated by taking the average positive wave pressure value based on synchronous data from uniformly distributing pressure sensors.Different strategies for calculating the average wave pressure have an impact on the magnitude of the total horizontal force,the average wave pressure calculated based on all measurement data is more reasonable,and the total horizontal force obtained by adopting this calculation strategy is closest to the total force sensor s results.