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加固鋼筋混凝土柱抗震性能參數影響分析
權少華1,趙海龍1,2,王鐵成1,2,林海3
摘 要

(1 天津大學建筑工程學院, 天津 300072; 2 濱海土木工程結構與安全教育部重點實驗室(天津大學), 天津 300072; 3 奧雅納工程顧問, 深圳 518048)

[摘要]為研究軸壓比、新增縱向鋼筋配筋率、新增箍筋的直徑及間距對增大截面加固鋼筋混凝土柱抗震性能的影響,建立了加固鋼筋混凝土柱有限元模型,通過與加固柱在往復荷載作用下的試驗滯回曲線進行比較,驗證了模型的有效性,并將模型應用于加固柱的抗震性能分析中。參數分析結果表明:增大截面加固鋼筋混凝土柱隨軸壓比的增加滯回曲線飽滿程度降低,屈服后位移循環次數減少,不利于抗震;加固柱的水平承載力和剛度隨著新增縱筋配筋率的增加而大幅提升;減小加密區的箍筋間距、增加新增箍筋的直徑改善增大截面加固柱的延性性能效果顯著。

[關鍵詞]加固鋼筋混凝土柱; 軸壓比; 新增縱向鋼筋配筋率; 新增箍筋

中圖分類號:TU375-3文獻標識碼:A文章編號:1002-848X(2019)04-0049-05

 

Analysis of parameter influence on seismic behavior of reinforced RC columns

Quan Shaohua1, Zhao Hailong1,2, Wang Tiecheng1,2, Lin Hai3

(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 Key Laboratory of Coast Civil Structure  and Safety(Tianjin University), Ministry of Education, Tianjin 300072, China; 3 ARUP, Shenzhen 518048, China)

Abstract:In order to study the influence of several parameters such as axial compression ratio, the new longitudinal reinforcement ratio, the new stirrup diameter and spacing on seismic behaviors of RC columns by enlarging section, a finite element analysis model was proposed. Compared with experimental hysteretic curves, it is shown that computational results are acceptable, indicating that the model proposed could be applied to the seismic analysis of reinforced RC columns. The analysis results of different parameters show that: with axial compression ratio increasing, the full extent of load-displacement hysteretic loops of the RC columns by enlarging section reduced, and the number of displacement cycles minimized after yield, which against seismic. Furthermore, increasing the new longitudinal reinforcement ratio can significantly improve the horizontal bearing capacity and stiffness of the reinforced columns. In addition, increasing the diameter of the new stirrup and reducing its spacing during encryption area can obviously improve the ductility of RC columns by enlarging section.

Keywords:reinforced RC columns; axial compression ratio; the new longitudinal reinforcement ratio; the new stirrup diameter and spacing

 

通訊作者:趙海龍,博士,副教授,Email: [email protected]

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