To investigate the seismic performance of a wind turbine that is influenced by both ice load and load, research proposes numerical approach for simulating behavior on monopile foundation. First, fluid–solid coupled equation water–ice–wind simplified assigning reasonable boundary conditions solving motion equation, developed. Then, this basis, we propose 3D model can simulate interactions among turbine, water sea ice. By conducting shaking table tests, results demonstrate established...

Research Article| September 26, 2017 On the Amplitude Discrepancy of HVSR and Site Amplification from Strong‐Motion Observations Mianshui Rong; Rong aInstitute Crustal Dynamics, China Earthquake Administration, No. 1, Anningzhuang Road, Haidian District, Beijing 100085, China, waltrong@126.comluyj1@263.netfAlso at Institute Geology Geophysics, Chinese Academy Sciences, 19, Beitucheng Western Chaoyang 100029, China. Search for other works by this author on: GSW Google Scholar Li‐Yun Fu; Fu...

The prediction method plays crucial roles in the accurate of rockfall runout range which could improve protection endangered residential areas and infrastructure. Recently, Knearest neighbor (KNN) algorithm, one many machine learning techniques, showed good performance pattern classification. Therefore, aim this study was to use K-nearest algorithm predict is classified into different subintervals according distance from slope toe. First, we proposed model based on our improved KNN better...

An accurate slope prediction model is important for reinforcement before the disaster. The k ‐nearest neighbor (KNN) algorithm, as a simple and effective nonparametric machine learning method, widely applied in classification recognition. In our study, algorithm improved to reduce its sample dependence improve robustness of then stability proposed based on algorithm. Extensive experimental results show that achieves high performance this regard. Moreover, comparison between finite element...

Using the seismic data collected since 2010 by China Earthquake Networks Center and based on maximum likelihood method, we analyzed temporal spatial anomalies of b-value prior to MS 6.0 Luxian earthquake September 16, 2021. The results are as follows. (1) broke historical record no M ≥ 6 occurring in Huayingshan fault zone, revealing that zone still has seismogenic ability medium strong earthquakes. (2) Before earthquake, b-values around focal areas exhibited increasing–peaking–decreasing...

Saline soil affected by earthquakes and groundwater can lead to subgrade subsidence collapse in highway construction. Consequently, considering the potential activity of waste slag magnesia, new cementitious composite materials used solid saline were developed our study. The unconfined compressive strengths solidified with a combination magnesium oxide, calcium gypsum, mineral powder cement investigated, optimum dosage proportion material for solidifying was determined; then SEM, EDS, XRD...

In the past 500 years, many moderate to strong earthquakes have occurred in or near Beijing metropolitan area, which is underlain by thick Quaternary and Tertiary sediments. Therefore, area susceptible damage associated with ground-motion site effect, particularly for large number of high-rise buildings. order understand earthquake effect potential, context buildings, we are undertaking an effort construct a 3-D shear-velocity model sediments area. this paper, present integrated method...

Because soluble salt in saline soil dissolves with water, utility tunnels built foundation are more likely to damage due by groundwater and earthquake. In this study, new cementitious composite materials were developed using slag, building gypsum, quicklime, magnesia. The unconfined compressive strengths of the solidified cement investigated, optimum proportion different components is determined. We found from microscopic characteristics that could better absorb chloride ions. Finally,...

Compared with onshore wind turbine, the offshore turbine is more easily destroyed influenced by complicated conditions at sea. In this study, a refined finite element model of in consideration soil-structure interaction built. The dynamic response tower different water depths investigated; then weak positions under earthquake determined. We found that pressure on one side inflow face pile foundation greatest; as rate flow increases, negative contact surface increased than positive pressure....

Based on the newly compiled and mostly complete unified earthquake catalogue for China’s seas adjacent areas, further information was obtained about structural shape dip angle of Benioff zone in Ryukyu Islands subduction during different stages. In addition, using damped regional stress tensor inversion method, we were able to investigate complex field characteristics dynamic significance shallow intermediate earthquakes zone. The results show that tectonic extensional along direction...

In our study, the vibration signal of impulse response and attenuation are extracted using correlation function power spectrum, natural frequency wind turbine is determined. Compared with rotation blades which 1p (one blade) 3p (three blades), performance The between frequencies one blade three turbine, can avoid resonance phenomenon meet precision requirement for engineering application. laws acceleration strain along under ordinary load obtained by installing sensor gauge turbine. We found...

Sea ice is one of the main loads acting on a wind turbine tower in areas prone to icing, and this threatens safe working life tower. In our study, simplified calculated model ice, tower, water dynamic interaction under earthquake action was proposed, which could avoid solve large number nonlinear equations. Then, seismic behaviour with without influence sea investigated, we found that greater mass response should be considered when designed an area thick ice. With most unfavourable mass,...

In this article, based on the nonlinear elastic-plastic finite element model for metro station, considering structure-soil dynamic interaction, influence laws of burial depth response and failure mode station structure under near far-field earthquakes are studied. We found that deformation may be omitted after a specific value depth. With increasing depth, acceleration amplification factors decreses. At last, indoor shaking table test was done, through which we determined position initial earthquake.