| In the offshore engineering design, wind and wave loads are the most important external loads. Therefore, the accurate understanding of wind and wave loads is very important. With the economic development, many enterprises expand to overseas markets, and the different values of the load codes between the Chinese and foreign countries and the effect of those are concerned. In the implementation of the The Belt and Road strategy, the Chinese and foreign countries load codes are studied comparatively to find the similarities and differences. It is significant in revision and improvement of our country standards and the reference for the engineering design. Therefore, this paper carries out the following work:(1) This paper introduce the chapters of the wind load in the different load codes of several countries: the Chinese code(GB50009-2012), US code(ASCE7-10) and Japanese code(AIJ2004). And it also compare basic wind speed, shape coefficient, wind pressure coefficient with height variation, topographic factors, wind vibration coefficient along wind and wind load formula along wind respectively. The value of wind load in Chinese code is smaller than that in the US and Japan, especially obvious at the bottom of the structure. The main reason is the different calculation method for basic wind speed and wind vibration coefficient in the different countries codes when considering the wind load.(2) By setting wave parameters calculated wave forces used to compare the Chinese "harbor Hydrological Practices"(JTJ213-2013), United States "Coastal Engineering Manual"(CEM) and Japan, "the technical standards of port facilities" in the wave force calculation formula standing wave, far and near breaking wave breaking wave phase front wall horizontal wave force with wave height, wave steepness variation, depth and height of the bed base, and compares the differences in calculation results. The results show that the Japanese specification phase standing wave wave load is significantly larger; breaking away wave phases Chinese norms wave forces at steep steep seabed, results greater; nearly breaking wave phase Chinese norms wave force smaller, mainly Chinese standard design wave relatively low reason.(3) Examine the value of the method of wave load factors was used to "harbor Hydrological Practices" Formula Harmony Tanami pressure formula was calculated. Coupled with relevant provisions of the United States and Japan in the specification, the calculation results under different wave forms were analyzed. The results show that use of a single wave load factor underestimated wave breaking wave forces might stage, the introduction of high coefficient substituted wave load factors, may be a means to pursue worthwhile.(4)Combined with an instability engineering example,which a steel sheet pile cofferdam in the Guangdong coastal areas is under the strong wind and wave, the finite element method is used for the stability analysis in construction period and the service period. And from a engineer security point, the reasonable selected methods of the wave load are discussed in this paper. As for the project which has the serious damage consequences and long construction period, the calculation results of wave load of the Japanese code should be taken as the engineering anti dumping, anti slip and the bearing capacity of the foundation and checking computations of the stability of the design input. Resulting from the maximum wave pressure relatively small, in the design, we should adopt the calculation results of Chinese standard formula to the part strength of the structure in the design. |
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