[1]傅剑平,王敏,赵杰.最小地震剪力系数[J].长安大学学报(自然科学版),2020,40(5):66-76.
 FU Jian ping,WANG Min,ZHAO Jie.Minimum seismic shear force coefficient[J].Journal of Chang’an University (Natural Science Edition),2020,40(5):66-76.
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最小地震剪力系数()
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长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第40卷
期数:
2020年5期
页码:
66-76
栏目:
桥梁与隧道工程
出版日期:
2020-09-15

文章信息/Info

Title:
Minimum seismic shear force coefficient
作者:
傅剑平王敏赵杰
1. 重庆大学 土木工程学院,重庆 400044; 2. 重庆文理学院 土木工程学院,重庆 402160
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
关键词:
结构工程抗震性能最小地震剪力系数罕遇地震抗倒塌
Keywords:
structural engineering seismic performance minimum seismic shear coefficient rare earthquake collapse prevention
文献标志码:
A
摘要:
为了研究最小地震剪力系数对结构抗震性能的影响,首先考察最小地震剪力系数的设置背景,然后考察不满足最小地震剪力系数时,不同处理方式及其对结构抗震性能的影响。以设防烈度7度(0.10g,g为重力加速度)区不满足最小地震剪力系数规定的一超高层结构为例,按不同处理方式(不做调整、调整承载力、调整刚度)形成3种不同的结构分析模型,对其进行弹塑性地震反应测试,并对比分析3种不同最小地震剪力系数处理方法引起的结构抗震性能的差异。结果表明:受非抗震组合和最小配筋率的影响,不做调整的模型与调整承载力的模型相同,其罕遇地震作用下的抗震性能良好,抗倒塌能力也较强;与不做调整的模型和调整承载力的模型相比,调整刚度模型的抗震性能更好,抗倒塌能力也更强,但调整付出的较大经济代价和对建筑使用功能的干扰与获得的抗震性能改善幅度并不对等。考虑到非抗震组合和最小配筋率的影响,建议合理对待关于7度(0.10g)区最小地震剪力系数的规定,即对于7度(0.10g)区不满足最小地震剪力系数规定的建筑结构,允许不调整承载力或刚度,但须通过性能优化设计保证结构具有足够的抗震安全性。
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.

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更新日期/Last Update: 2020-10-12