Soil underneath a structure might affect the behavior and the overall response of the structure in seismic events. The role of loose soil conditions and the inclusion of soil-structure interaction (SSI) in the analysi...Soil underneath a structure might affect the behavior and the overall response of the structure in seismic events. The role of loose soil conditions and the inclusion of soil-structure interaction (SSI) in the analysis are important issues that need to be addressed. Since steel structures are light, two configurations designed as spatial and perimeter are considered to study the effect of soil on the steel structural frames for the same building. The paper provides a parametric analysis on the influence of SSI on the overall performance of MRFs (Moment Resisting Frames) according to the provisions of Saudi Building Code (SBC) [1]. A case study has been developed in which spatial and perimeter moment resisting frames of 12, 6 and 3 stories residential buildings are designed using Saudi Building Code (SBC) prescriptions. A modal response spectrum analysis has been carried out to see the influence of SSI on the fundamental period of vibration, top story displacement and inter-story drift limitations. Moreover, a static non-linear analysis has been performed to investigate the performance of frames, thus allowing to identify the influence of SSI on the structural design of steel MRFs.展开更多
文章基于RANS方程,对计及自由面影响的双桨转动情况下的舰船旋臂试验(RAT)粘性流场数值模拟方法进行了研究。在旋臂试验的数值模拟中,根据旋臂试验的特点,采用分区混合网格,结合MRF方法和滑移网格方法,解决船体圆运动及螺旋桨定轴旋转...文章基于RANS方程,对计及自由面影响的双桨转动情况下的舰船旋臂试验(RAT)粘性流场数值模拟方法进行了研究。在旋臂试验的数值模拟中,根据旋臂试验的特点,采用分区混合网格,结合MRF方法和滑移网格方法,解决船体圆运动及螺旋桨定轴旋转运动的叠合难题。文中以ITTC推荐的MARIN model no.7967船模为对象,对其在四组转动半径下的旋臂试验进行了数值计算,并将结果与权威水池试验结果进行了对比,吻合良好。文中提出的方法可获得全附体船模旋转流场水动力性能参数,可以较真实地模拟其流场特性,获取包括船—舵—桨干扰在内的流场信息。该文的工作是可行的、有效的,可为深入研究舰船自由旋回试验及非定常操纵运动的数值模拟提供基础。展开更多
文摘Soil underneath a structure might affect the behavior and the overall response of the structure in seismic events. The role of loose soil conditions and the inclusion of soil-structure interaction (SSI) in the analysis are important issues that need to be addressed. Since steel structures are light, two configurations designed as spatial and perimeter are considered to study the effect of soil on the steel structural frames for the same building. The paper provides a parametric analysis on the influence of SSI on the overall performance of MRFs (Moment Resisting Frames) according to the provisions of Saudi Building Code (SBC) [1]. A case study has been developed in which spatial and perimeter moment resisting frames of 12, 6 and 3 stories residential buildings are designed using Saudi Building Code (SBC) prescriptions. A modal response spectrum analysis has been carried out to see the influence of SSI on the fundamental period of vibration, top story displacement and inter-story drift limitations. Moreover, a static non-linear analysis has been performed to investigate the performance of frames, thus allowing to identify the influence of SSI on the structural design of steel MRFs.
文摘文章基于RANS方程,对计及自由面影响的双桨转动情况下的舰船旋臂试验(RAT)粘性流场数值模拟方法进行了研究。在旋臂试验的数值模拟中,根据旋臂试验的特点,采用分区混合网格,结合MRF方法和滑移网格方法,解决船体圆运动及螺旋桨定轴旋转运动的叠合难题。文中以ITTC推荐的MARIN model no.7967船模为对象,对其在四组转动半径下的旋臂试验进行了数值计算,并将结果与权威水池试验结果进行了对比,吻合良好。文中提出的方法可获得全附体船模旋转流场水动力性能参数,可以较真实地模拟其流场特性,获取包括船—舵—桨干扰在内的流场信息。该文的工作是可行的、有效的,可为深入研究舰船自由旋回试验及非定常操纵运动的数值模拟提供基础。
