|Table of Contents|

Minimum seismic shear force coefficient(PDF)

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

Issue:
2020年5期
Page:
66-76
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Minimum seismic shear force coefficient
Author(s):
FU Jianping;  WANG Min;  ZHAO Jie
1. School of Civil Engineering, Chongqing University, Chongqing 400044, China;2. School of Civil Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
Keywords:
structural engineering;  seismic performance;  minimum seismic shear coefficient;  rare earthquake;  collapse prevention
PACS:
-
DOI:
-
Abstract:
In order to study the influence of the minimum seismic shear coefficient on the seismic performance of the structure, the setting background of the minimum seismic shear coefficient was firstly investigated, and then the different treatment methods and their influence on the seismic performance of the structure were investigated, when the minimum seismic shear coefficient was not satisfied. A highrise structure was used as an example, which locates in the seismic intensity zone 7(0.10g) and does not meet the provisions of the minimum seismic shear coefficient. Three different structure analysis models were formed according to different treatment methods (no adjustment, adjusting bearing capacity, and adjusting stiffness). The elasticplastic seismic response tests were carried out, and the differences of seismic performance caused by three different minimum seismic shear force coefficient processing methods were compared and analyzed. That the model without adjustment is the same as the model of adjusting bearing capacity because of the nonseismic combination and the minimum reinforcement ratio. Their seismic performance under rare earthquakes is good and the capacity of collapse prevention is also strong. Compared with these two models, seismic performance of the model with adjusted stiffness under rare earthquakes is better and its capacity of collapse prevention is also stronger. This adjustment costs huge and the building functional deteriorates, but the seismic performance is not improved proportionally, and the adjustment is not cost effective and not needful. Therefore, considering the influence of the nonseismic combination and the minimum reinforcement ratio, it is recommended to deal with the provision of the minimum seismic shear coefficient for seismic intensity zone 7(0.10g) rationally. In other words, no adjustment of bearing capacity or stiffness is allowed for building structures whose minimum seismic shear coefficient is not satisfied in the 7 degree (0.10g) zone, but the structural seismic safety is guaranteed by performancebased design. 10 tabs, 5 figs, 29 refs.

References:

Memo

Memo:
-
Last Update: 2020-10-12