Torsional and lateral vibration of a high-rise building with L shape plan under earthquake will couple because of large distance between center of stiffness and center of mass.
平面L形高层建筑结构的刚度中心与质量中心偏离较大，在水平地震作用下平移振动与扭转振动扭耦合。
The floor plan is organised around two corridors that together form an L shape.
建筑平面围绕两个走廊布置，呈L形。
Complementing the L-shaped plan of the existing, the extension closes the shape to create a square and a central courtyard.
在原有建筑的L型平面上，扩建部分与原有部分围合出一个方形中心庭院。
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