PDF全文阅读

宣立发¹ , 梁玉 国² , 魏超凡¹ , 赵贵金¹ , 赵凯璇¹

 

(1. 河北工程大学 土木工程学院 , 邯郸   056038; 2. 河北省建筑科学研究院有限公司 , 石家庄    050227)

摘  要: 为了研究加固后门式刚架的抗震性能 , 运用 Midas Gen 建立结有限元模型 , 通过特征值分析获得其主要动力特性 ; 对处于多遇地震下的刚架进行反应谱分析 , 研究不同地震工况下加固门式刚架的位移响应 ; 采用动力时程分析法 , 在不同地震波作用下对比分析加固前后结构时程响应 。结果表明 : 加固后结构的自振周期均呈减小趋势 ; 采用改变结构体系加固法加固刚架后 , 其抗侧刚度和抗扭刚度显著增强 ; 采用增大截面法加固的结构在弹性阶段抗震表现最优 ; 观察到相较于其他加固方法 , 改变结构体系加固法和增大截面法对各种抗震设防烈度下原结构的柱顶位移加固作用显著 。该研究成果可为针对门刚的抗震情况择优加固提供借鉴与参考。

关键词: 门式刚架 ; 加固设计 ; 抗震性能 ; 有限元分析

中图分类号: TU278      文献标志码: A      文章编号: 1005-8249 (2026) 05-0154-06

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 05. 023

 

 

XUAN Lifa¹ , LIANG Yuguo² , WEI Chaofan¹ , ZHAO Guijin¹ , ZHAO Kaixuan¹

(1. School of Civil Engineering, Hebei University of Engineering, Handan 056038, China;

2. Hebei Academy of Building Research Co. , Ltd. , Shijiazhuang 050227, China)

Abstract : In order to study the seismic performance of reinforced front and rear rigid frames, Midas Gen was used to establish the finite element model, and the main dynamic characteristics were obtaned by eigenvalue analysis.  The response spectrum analysis of rigid frames under frequent earthquakes is carried out, and the difference of displacement response of reinforced front and rear rigid frames under different seismic conditions is studied. Using dynamic time history analysis method, the time history response of the structure before and after reinforcement is compared and analyzed under different seismic waves.  The results show that the natural vibration period of the structure is decreasing. After the frame was strengthened by the method of changing the structural system, its lateral stiffness and torsional stiffness were significantly enhanced.  The structure reinforced by the expanded section method has the best seismic performance in the elastic stage.  It is observed that, compared with other reinforcement methods, the structural system modification reinforcement method and the section enlargement method have a significant reinforcing effect on the column top displacement of the original structure under various seismic fortification

  intensities. This research outcome can provide reference and guidance for the optimal reinforcement of portal frames in terms of their seismic resistance.

Key words: portal frame; reinforcement design; seismic performance; finite element analysis

 

作者简介 : 宣立发 (1997—) , 男, 硕士研究生, 研究方向 : 混凝土结构与抗震。

收稿日期 : 2023-11-04