[1]黄远,王力.考虑扭转作用的 RC 框架抗连续倒塌性能研究[J].郑州大学学报(工学版),2023,44(05):93-100.[doi:10.13705/j.issn.1671-6833.2023.02.006]
　HUANG Yuan,WANG Li.Progressive Collapse Resistance of RC Frame Structures Considering Torsion[J].Journal of Zhengzhou University (Engineering Science),2023,44(05):93-100.[doi:10.13705/j.issn.1671-6833.2023.02.006]
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考虑扭转作用的 RC 框架抗连续倒塌性能研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
44
期数:
2023年05期
页码:
93-100
栏目:
出版日期:
2023-08-20

文章信息/Info

Title:
Progressive Collapse Resistance of RC Frame Structures Considering Torsion
作者:
黄远1; 2; 王力2
1. 湖南大学 工程结构损伤诊断湖南省重点实验室,湖南 长沙 410082; 2. 湖南大学 土木工程学院,湖南 长沙 410082
Author(s):
HUANG Yuan1; 2 ;  WANG Li2
关键词:
连续倒塌;  扭转;  RC 框架;  数值分析;  横向梁;  承载力
Keywords:
progressive collapse;  torsion;  RC frame;  numerical analysis;  transverse beam;  bearing force
分类号:
TU375. 4
DOI:
10.13705/j.issn.1671-6833.2023.02.006
文献标志码:
A
摘要:
为了探究扭转对 RC 框架抗连续倒塌性能的影响,利用 LS-DYNA 建立了有限元模型,在对梁受扭试验以 及框架抗连续倒塌试验合理验证的基础上,研究了扭转对平面框架抗连续倒塌性能的影响机制,分析了空间框架 抗倒塌性能。 结果表明:相比于不受扭构件,当梁所受初始扭矩分别达到梁截面抗扭承载力的 20%、40%、60% 及 80%时,结构在连续倒塌下的压拱承载力分别降低了 0. 5%、3. 4%、10. 9%、15. 6%;随着梁所受扭矩的不断增大,中 柱端梁底钢筋的断裂呈现先提前再延后的趋势,而中柱端梁顶钢筋的断裂不断提前;空间框架中由于横向梁弯曲 产生的协调扭转作用会使得梁底钢筋相比于平面框架先断裂,钢筋断裂前空间框架的抗倒塌承载力基本等于其对 应的平面框架与横向梁的承载力的叠加。
Abstract:
To explore the effect of torsion on the progressive collapse resistance of RC frame, a finite element model was established by LS-DYNA. Based on the reasonable verification of the torsion tests of beams and the antiprogressive collapse tests of frames, the influence mechanism of torsion on the progressive collapse resistance of the 2-D frame was studied, and the anti-collapse performance of the spatial frame was analyzed. The results showed that compared with non-torque members, when the initial torque reached 20%, 40%, 60%, and 80% of the torsional resistance of the beam, the compressive arch action capacity decreased by 0. 5%, 3. 4%, 10. 9%, and 15. 6%, respectively. With the increasing torque, the fracture of the beam bottom reinforcements showed a trend of advancing and then delaying. While the fracture of the beam top reinforcements near the middle column kept advancing. The coordinated torsion caused by transverse beam bending in the spatial frame would make the bottom reinforcements fracture earlier than the planar frame. The collapse resistance of the spatial frame was equal to the superposition of the capacities of its corresponding planar frame and transverse beam before the reinforcements fracture.

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相似文献/References:

[1]陈伟宏、刘方豪、乔泽慧、崔双双.钢筋混凝土框架抗连续倒塌性能影响因素分析[J].郑州大学学报(工学版),2021,42(02):31.[doi:10.13705/j.issn.1671-6833.2021.02.007]
　CHEN Weihong,LIU Fanghao,QIAO Zehui,et al.Analysis on Factors Affecting the Capability of Collapse of Reinforced Concrete[J].Journal of Zhengzhou University (Engineering Science),2021,42(05):31.[doi:10.13705/j.issn.1671-6833.2021.02.007]

更新日期/Last Update: 2023-09-04