Influence of seismic action adjustments on seismic design and safety of RC frames

被引：0
|
作者：
Lu X. [1 ]
Lu X.-Z. [2 ]
Li M.-K. [3 ]
Gu D.-L. [2 ]
Xie L.-L. [4 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Department of Civil Engineering, Tsinghua University, Beijing
[3] China Architecture Design Group, Beijing
[4] School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing
来源：
Gongcheng Lixue/Engineering Mechanics | 2017年 / 34卷 / 04期
关键词：
Axial compression ratio; Earthquake-induced collapse analysis; RC frame; Seismic action; Seismic safety;
D O I：
10.6052/j.issn.1000-4750.2016.11.0871
中图分类号：
学科分类号：
摘要：
The experience of Wenchuan earthquake and Lushan earthquake shows that the actual seismic intensity suffered by buildings was often much greater than the code-specified seismic design intensity, which caused very serious damage to buildings. Although the seismic safety margin of buildings in China is in continuous improvement with the updating of seismic design code and seismic hazard map, many experts still believe that to date the seismic safety level of buildings in China is not sufficient yet. Hence, how to determine the reasonable seismic action is important and meaningful to ensure the seismic safety. Based on a series of reinforced concrete frames designed according to the Code for Seismic Design of Buildings (GB 50011-2010), these frames are redesigned with the adjustments of seismic design parameters, including dynamic amplification factor (βmax), seismic action, and dead and live load combination factors. The earthquake-induced collapse analysis is conducted for these frames. Consequently, the influence of the adjustments on the seismic forces, material consumption and seismic safety is discussed. The results indicate that the parameters adjustments make the axial compression ratio for columns increase by about 8%, and the reinforcement ratio for beams and slabs increase by about 6%. For frames whose collapse starts from the bottom story, the parameters adjustments can obviously improve the seismic safety of the frames. However, with the increasing of seismic design intensity, the increased amplitude of seismic safety will decrease slightly. © 2017, Engineering Mechanics Press. All right reserved.
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页码：22 / 31
页数：9
相关论文
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