|Table of Contents|

Criterion of mode number selection in seismic design for high-rise building structures(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年04期
Page:
73-76
Research Field:
Publishing date:
2009-08-20

Info

Title:
Criterion of mode number selection in seismic design for high-rise building structures
Author(s):
LIU Ming1; LI Shi-cui2; LIU Bo-quan1
1.School of Civil Engineering,Chang’an University,Xi’an 710061,Shaanxi,China;2.China Light Industry Xi’an Design Engineering Company Ltd,Xi’an 710048,Shaanxi,China
Keywords:
structure engineering;  highrise building structure;  seismic design;  modal participating mass ratio;  mode number selection
PACS:
TU973.31
DOI:
-
Abstract:
Based on selecting mode number in seismic design of highrise building structures in Chinese current code for seismic design of building has not express provision, the relationship between mode and many influences in seismic calculation of highrise building structures is studied. This paper puts forward that the different high mode influences the distribution of base shear along the height of structure. Modal participating mass is a parameter, which effects the contribution to the base shear by each mode based on equivalent to the base shear. Mode number selection in seismic calculation of highrise building structures relates to modal participating mass. The research result indicates that the influence of high mode should not be neglected in the seismic design of tall building structures. The decision principle of mode number is: when the error of base shear and top displacement are both below 5%, the sum of modal participating mass ratio should exceed 90%; for the irregular structure, the dynamic load participation ratio should exceed 95%. 3 tabs, 3 figs, 8 refs.

References:

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Memo

Memo:
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Last Update: 2009-08-20