【摘要】 海上风电基础在服役期间受潮汐、海浪以及风荷载作用会产生较大倾覆弯矩，为了研究承受不同速率的荷载作用时多桶导管架基础的荷载响应，在砂土地基中开展变速率水平荷载下的1g物理模型试验，分析荷载速率对多桶导管架基础最大弯矩与水平承载力的影响规律。结果表明：随着加载速率的不断增大，荷载-位移曲线的峰值不断增大，且最大水平承载力对应的位移区间越晚出现；在不同速率的水平荷载下，多桶导管架基础前桶竖向位移绝对值和桶内孔压累积水平均大于后桶；水平加载速率增加带来的弯矩与水平承载力的上升是由于孔压累积所引起的。更多还原

【Abstract】 In order to study the load response of multi-barrel jacket foundation under different rates of loads, 1g physical model tests under variable rate horizontal loads are carried out in sandy soil foundation to analyze the influences of loading rate on the maximum bending moment and horizontal bearing capacity of multi-barrel jacket foundation. The results show that the peak value of load displacement curve increases with the increase of the loading rate, and the displacement interval corresponding to the maximum horizontal bearing capacity appears later. Under the horizontal loads with different rates, the absolute value of the vertical displacement of the front bucket and the accumulated water in the hole pressure in the bucket are larger than those in the rear bucket on average. The increase in bending moment and horizontal bearing capacity caused by the increase in horizontal loading rate is due to the accumulation of pore pressure.更多还原