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| 1 | Three-dimensional simulation of sintering crunodes of metal powders or fibers by level set method显示文摘The difference of sintering crunodes of metal powders and fibers is discussed. The mathematical model of the surface diffusion described by the difference in mean curvature is defined as a Hamilton-Jacobi-type equation, and the model is numerically solved by the level set method. The three-dimensional numerical simulations of two metal powders and fibers(the fiber angle is 0° or 90°) are implemented by this mathematical model, respectively. The numerical simulation results accord with the experimental ones. The sintering neck growth trends of metal powders and metal fibers are similar. The sintering neck radius of metal fibers is larger than that of metal powders. The difference of the neck radius is caused by the difference of geometric structure which makes an important influence on the curvature affecting the migration rate of atoms. | 谌东东 郑洲顺 王建忠 汤慧萍 曲选辉 | 2015 | Journal of Central South University2015，22，7： | 1 |
| 2 | 嘉盛大厦项目结构抗震设计显示文摘嘉盛大厦结构高度175.2 m,属超B级高度高层建筑,采用框支剪力墙结构,转换层设置于2层楼面。项目存在扭转不规则、楼板不连续、竖向构件不连续三项不规则,且高宽比为8.65。采用YJK及MIDAS BUILDING软件进行了小震弹性计算,并采用YJK、SAUSAGEH和ABAQUS软件进行了动力弹塑性时程分析,由于剪力墙需严格控制厚度,故风荷载下的位移角较大,通过加厚关键处楼板、合理调整梁墙截面等措施,各项计算指标均显示结构是安全可靠的。此外,针对本项目超限情况,底部加强区采用了新型带螺栓连接的分离式双片钢板剪力墙,对钢板、钢筋、混凝土之间使用耳板加强连接,在保证结构刚度的前提下,有效减小结构自重,并具有施工快、抗震性能好的特点。 | 谢杰文 张小良 | 2018 | 广东土木与建筑2018，25，2： | 0 |
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