超高层转换结构中震性能目标的讨论

Discussion on the Moderate Earthquake Performance Target of Super High-rise Conversion Structure

通过工程实例,讨论了转换结构构件的中震性能目标设定;中震弹性位移角宜在1.5~2倍小震弹性位移角范围内;关键构件的抗弯、抗剪性能应区别对待,提高抗剪储备;对于关键构件如果只是加大抗弯而忽略抗剪的增长,则将违背“强剪弱弯”的设计原则,加大抗弯能力同时应适当提高抗剪能力;应使用框支梁的抗弯实际配筋反算与之相连的框支柱的抗弯、抗剪承载力,以达到“强柱弱梁”的性能目标。

Through the engineering examples,the moderate earthquake performance target setting of the transfer structural members is discussed. The elastic displacement angle of moderate earthquake should be within the range of 1.5~2 times the frequent earthquake elastic displacement angle;the bending and shear resistance of key components should be treated differently and improve the shear reserve. The design principle of “strong shear capacity and weak bending capacity” will be violated if we only increase the bending capacity not the shear capacity for the critical members,the shear capacity should be properly increased when increasing the bending capacity. The flexural capacity of the beam is inversely calculated from the bending and shear bearing capacity of the frame pillar connected to it to achieve the performance goal of “strong column weak beam”.