1. School of Civil Engineering, Chang'an University, Xi'an Shaanxi 710061, China;
2. School of Highway, Chang'an University, Xi'an Shaanxi 710064, China
Parametric Analysis of Seismic Performance of RC Columns Strengthened with Steel Wire Mesh
HUANG Hua1,2, ZHANG Yu1, ZHENG Yi-bin1, TIAN Ke1, LIU Bo-quan1
1. School of Civil Engineering, Chang'an University, Xi'an Shaanxi 710061, China;
2. School of Highway, Chang'an University, Xi'an Shaanxi 710064, China
摘要By establishing a finite element (FE) model of reinforced concrete (RC) columns strengthened with steel wire mesh, the mechanical properties under low-cyclic loading are analyzed, and the correctness of the FE model is verified. Hysteretic curves, skeleton curves, strain curves, and changes in stiffness and ductility of the strengthened RC columns under various strengthening conditions are calculated in this study by using the FE model to examine the effects of axial compression ratio, longitudinal reinforcement ratio, concrete strength, steel wire quantity, and eccentric compression on the seismic behavior of the strengthened columns. The results show that an increase in axial compression ratio results in an improvement in the ultimate bearing capacity of the strengthened columns by 9%-17% and a reduction in ductility by 9%-15%. In addition, increases in the stirrup ratio, longitudinal reinforcement ratio, concrete strength, and steel wire quantity result in improvement in ultimate bearing capacity, and ductility of the strengthened columns can be improved by 2%-28%. Moreover, an increase in vertical pressure results in rapid development of eccentric, stirrup, and steel wire strains in the strengthened columns, which causes reductions in ultimate bearing capacity in the columns by 2%-13%, energy consumption by 35%, and additional reductions in stiffness and ductility.
Abstract：By establishing a finite element (FE) model of reinforced concrete (RC) columns strengthened with steel wire mesh, the mechanical properties under low-cyclic loading are analyzed, and the correctness of the FE model is verified. Hysteretic curves, skeleton curves, strain curves, and changes in stiffness and ductility of the strengthened RC columns under various strengthening conditions are calculated in this study by using the FE model to examine the effects of axial compression ratio, longitudinal reinforcement ratio, concrete strength, steel wire quantity, and eccentric compression on the seismic behavior of the strengthened columns. The results show that an increase in axial compression ratio results in an improvement in the ultimate bearing capacity of the strengthened columns by 9%-17% and a reduction in ductility by 9%-15%. In addition, increases in the stirrup ratio, longitudinal reinforcement ratio, concrete strength, and steel wire quantity result in improvement in ultimate bearing capacity, and ductility of the strengthened columns can be improved by 2%-28%. Moreover, an increase in vertical pressure results in rapid development of eccentric, stirrup, and steel wire strains in the strengthened columns, which causes reductions in ultimate bearing capacity in the columns by 2%-13%, energy consumption by 35%, and additional reductions in stiffness and ductility.
基金资助:Supported by the National Natural Science Foundation of China (No.51308065);the Specialized Research Fund for Doctoral Program of Higher Education of China (No.20090205120008);the Fundamental Research Funds for Central Universities (No.2014G2280014);the Postdoctoral Science Fundation of China(No.2012M511956, No.2014T70896);and the Natural Science Foundation of Shaanxi Province of China(No.2012JQ7024)
黄华, 张玉, 郑益斌, 田轲, 刘伯权. 钢绞线网加固RC柱抗震性能影响因素分析[J]. Journal of Highway and Transportation Research and Development, 2014, 8(3): 52-63.
HUANG Hua, ZHANG Yu, ZHENG Yi-bin, TIAN Ke, LIU Bo-quan. Parametric Analysis of Seismic Performance of RC Columns Strengthened with Steel Wire Mesh. Journal of Highway and Transportation Research and Development, 2014, 8(3): 52-63.
[1] NIE Jian-guo, WANG Han-bing, ZHANG Tian-shen, et al. Experimental Study On Flexural Behavior of RC Beams Strengthened with Stainless Steel Wire Mesh and Permeability Polymer Mortar[J]. Journal of Building Structures, 2005, 26(2):1-9. (in Chinese)
[2] NIE Jian-Guo, CAI Qi, ZHANG Tian-Shen, et al. Experimental Study on Shear Behavior of RC Beams Strengthened with Stainless Steel Wire Mesh and Permeability Polymer Mortar[J]. Journal of Building Structures, 2005, 26(2):10-17. (in Chinese)
[3] HUANG Hua, LIU Bo-quan, XING Guo-hua, et al. Experiment on RC T-Type Beam Bridge Strengthened with High Strength Stainless Steel Wire Mesh and Permeability Polymer Mortar[J]. China Journal of Highway and Transport, 2007, 20(4):83-90. (in Chinese)
[4] CHEN Liang. Experimental Study of the Seismic Behavior of RC Column Strengthened with High Strength Steel Wire[D]. Beijing:Tsinghua University, 2004. (in Chinese)
[5] ZHONG Cong-ming. Study on Reinforcement Technology of Confined Concrete Column[D]. Beijing:China Academy of Building Research, 2004. (in Chinese)
[6] ZHANG Li-feng, YAO Qiu-lai, CHENG Shao-ge, et al. Experimental Investigation on Columns Strengthened with High-Strength Steel Wire Mesh and Polymer Mortar under Eccentric Loading[J]. Sichuan Building Science, 2007, 33(7):146-151. (in Chinese)
[7] MANDER J B, PRIESTLEY M J N, PARK R. Theoretical Stress-Strain Model for Confined Concrete[J]. Journal of Strctural Engineering, ASCE, 1988, 114(8):1804-1826.
[8] SI Bing-jun, SUN Zhi-guo, AI Qing-hua, et al. Sensitive Analysis and Model Modification for Finite Element Analysis of R/C Bridge Piers under Cyclic Loading[J]. Engineering Mechanics, 2009, 26(1):174-186. (in Chinese)
[9] HUANG Hua, LIU Bo-quan, HE Quan-hai, et al. Numerical Analysis on Shear Performance of RC Beam Strengthened with High Strength Stainless Wire Mesh[J]. Journal of Highway and Transportation Research and Development, 2012, 29(9):50-57. (in Chinese)
[10] ZHOU Zheng-mao, GONG Zhen-qiu, WANG Su-juan. Tension Control for Strands in Cables Based on Reverse Analysis[J]. Journal of Highway and Transportation Research and Development, 2009, 26(4):74-77. (in Chinese)
[11] CUI Hai-qin, HE Quan-hai, SONG Yi-fan. Experimental Study on Antiseismic Ductility of Hollow Rectangular Thin-walled Pier[J]. Journal of Highway and Transportation Research and Development, 2010, 27(6):59-63. (in Chinese)
[12] ZHOU Pi-jian, YANG Yong, LI Hui-jing. Study on Calculation Method of Flexure Rigidity of Steel Plate-Concrete Composite Bridge Decks[J]. Journal of Highway and Transportation Research and Development, 2010, 27(9):64-67. (in Chinese)
[1]
常柱刚, 王林凯, 夏飞龙. 基于CV NewMark-b法桥梁风致振动FSI数值模拟[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 28-37.
2014, Vol. 8 
