Typhoons　frequently　occur　along　the　southeastern　coast　of　China,　and　offshore　wind　turbines　often　suffer　from　multiple　cycling　and　reconsolidation　during　their　service　life.　However,　there　is　currently　limited　research　on　effects　of　cycling　and　reconsolidation.　To　address　this,　a　series　of　centrifuge　tests　was　conducted　on　two　types　of　large-diameter　monopile　foundations　in　soft　clay　with　different　amplitudes,　aiming　to　reveal　and　quantify　the　impact　of　episodic　cycling　and　reconsolidation　effect　on　key　design　indicators　such　as　cumulative　displacement　and　pile　head　stiffness　of　large-diameter　monopiles.　The　test　results　show　that　under　the　same　cyclic　load　amplitude,　after　two　episodes　of　cycling　and　reconsolidation,　the　maximum　stiffness　of　the　pile　head　of　monopile　foundation　can　increase　by　1.5　times　compared　to　the　initial　stiffness.　This　significantly　reduces　the　cumulative　displacement　of　the　monopile,　with　a　maximum　reduction　of　63%.　Therefore,　if　the　episodic　cycling　and　reconsolidation　effect　on　the　subsequent　cyclic　response　of　a　monopile　is　not　considered　in　the　design　process,　and　the　cumulative　displacement　of　a　monopile　under　each　extreme　typhoon　is　directly　accumulated,　it　will　seriously　overestimate　the　cumulative　displacement　of　the　pile,　leading　to　a　conservative　design.　©　2024　Biodiversity　Research　Center　Academia　Sinica.　All　rights　reserved.