某等腰直角三角形平面高层建筑结构特性分析

Structural analysis of a high-rise building with isosceles right triangle plane

等腰直角三角形的平面形式因有一些不利的结构特性,在高层建筑中比较少见。以具体工程为例,分析了等腰直角三角形平面的抗侧抗扭不利性,以及高宽比、地震计算角度的确定方法,并尝试通过在三角形平面的角部增设类角筒来增加角部抗侧力构件的刚度。研究表明,增加外框架的环向刚度可以提高外框架结构的抗扭性能;通过调节核心筒两侧墙厚等设计及构造措施可使等腰直角三角形结构体系趋于更合理。

The plane form of isosceles right triangle is rarely used in high-rise buildings because of some unfavorable structural characteristics. Taking a an actual project as an example, the disadvantage of lateral torsion resistance, the aspect ratio and the determination method of seismic calculation angle of isosceles right triangle plane were analyzed. And the corner tubes were tried to added on the corners of the triangular plane to increase the stiffness of the lateral resistance components. The results show that the torsion resistance of the outer frame structure can be improved by increasing the circumferential stiffness of the outer frame, and the isosceles right triangle structure system can be more reasonable by adjusting the wall thickness on both sides of the corewall.