Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets
Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT
Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets
An experimental and numerical program is carried out in this research to investigate the influence of CFRP sheets on the cyclic behavior of unconfined connections made with recycled concrete. Cement is partially replaced by silica fume, iron filling and pulverised fuel ash using two different percentages: 15% and 20%. Each specimen is partially loaded at the first stage and then specimens are repaired using CFRP sheets. The repaired specimens are then laterally loaded until failure. In addition, a finite element model is built in ABAQUS and verified using the experimental results. The experimental results have shown that the repaired specimens have regained almost double the capacity of the un-repaired specimens and hence the adopted repair configuration is recommended for retrofitting seismically vulnerable RC connections. Increasing cement replacement percentage by silica fume, fuel ash or iron filling from 15% to 20% has reduced joint carrying capacity and weakened the joint. It is recommended using 15% pulverised fuel ash or silica fume as cement partial replacement to enhance the strength and ultimate drift of beam-column joints under cyclic loading. Iron filling concrete is also recommended but the enhancement is relatively less than that found with pulverised fuel ash concrete and silica fume concrete.
retrofitting / CFRP sheets / recycled concrete / pulverised fuel ash / silica fume / cyclic / beam-column connections
[1] |
Murad Y Z. Analytical and numerical assessment of seismically vulnerable corner connections under bidirectional loading in RC framed structures. Dissertation for the Doctoral Degree. London: Imperial College London, 2016
|
[2] |
Karayannis C G, Sirkelis G M. Strengthening and rehabilitation of RC beam-column joints using carbon-FRP jacketing and epoxy resin injection. Earthquake Engineering & Structural Dynamics, 2008, 37(5): 769–790
CrossRef
Google scholar
|
[3] |
Kalogeropoulos G I, Tsonos A D G, Konstandinidis D, Tsetines S. Pre-earthquake and post-earthquake retrofitting of poorly detailed exterior RC beam-to-column joints. Engineering Structures, 2016, 109: 1–15
CrossRef
Google scholar
|
[4] |
Faleschini F, Gonzalez-Libreros J, Zanini M A, Hofer L, Sneed L, Pellegrino C. Repair of severely-damaged RC exterior beam-column joints with FRP and FRCM composites. Composite Structures, 2019, 207: 352–363
CrossRef
Google scholar
|
[5] |
Le-Trung K, Lee K, Lee J, Lee D H, Woo S. Experimental study of RC beam–column joints strengthened using CFRP composites. Composites. Part B, Engineering, 2010, 41(1): 76–85
CrossRef
Google scholar
|
[6] |
Garcia R, Hajirasouliha I, Pilakoutas K. Seismic behaviour of deficient RC frames strengthened with CFRP composites. Engineering Structures, 2010, 32(10): 3075–3085
CrossRef
Google scholar
|
[7] |
Sasmal S, Ramanjaneyulu K, Novák B, Srinivas V, Saravana Kumar K, Korkowski C, Roehm C, Lakshmanan N, Iyer N R. Seismic retrofitting of nonductile beam-column sub-assemblage using FRP wrapping and steel plate jacketing. Construction & Building Materials, 2011, 25(1): 175–182
CrossRef
Google scholar
|
[8] |
Sharma R, Bansal P P. Behavior of RC exterior beam column joint retrofitted using UHP-HFRC. Construction & Building Materials, 2019, 195: 376–389
CrossRef
Google scholar
|
[9] |
Beydokhty E Z, Shariatmadar H. Behavior of damaged exterior RC beam-column joints strengthened by CFRP composites. Latin American Journal of Solids and Structures, 2016, 13(5): 880–896
CrossRef
Google scholar
|
[10] |
Obaidat Y T, Abu-Farsakh G A F R, Ashteyat A M. Retrofitting of partially damaged reinforced concrete beam-column joints using various plate-configurations of CFRP under cyclic loading. Construction & Building Materials, 2019, 198: 313–322
CrossRef
Google scholar
|
[11] |
Abu Tahnat Y B, Dwaikat M M S, Samaaneh M A. Effect of using CFRP wraps on the strength and ductility behaviors of exterior reinforced concrete joint. Composite Structures, 2018, 201: 721–739
CrossRef
Google scholar
|
[12] |
Rodopoulos C A, Pilakoutas K, Gdoutos E E. Failure Analysis of Industrial Composite Materials. McGraw-Hill Professional Engineering, 2000
|
[13] |
Murad Y. An experimental study on flexural strengthening of RC beams using CFRP sheets. International Journal of Engineering & Technology, 2018, 7(4): 2075–2080
CrossRef
Google scholar
|
[14] |
Murad Y. The influence of CFRP orientation angle on the shear strength of RC beams. The Open Construction & Building Technology Journal, 2018, 12: 269–281
|
[15] |
Bukhari I A, Vollum R L, Ahmad S, Sagaseta J. Shear strengthening of reinforced concrete beams with CFRP. Magazine of Concrete Research, 2010, 62(1): 65–77
CrossRef
Google scholar
|
[16] |
Norris T, Saadatmanesh H, Ehsani M R. Shear and flexural strengthening of R/C beams with carbon fiber sheets. Journal of Structural Engineering, 1997, 123(7): 903–911
CrossRef
Google scholar
|
[17] |
Noori K M G, Ibrahim H H. Mechanical properties of concrete using iron waste as a partial replacement of sand. Eurasian Journal of Science & Engineering, 2018, 3(3): 75–82
|
[18] |
Zhang Z, Hsu C T T. Shear strengthening of reinforced concrete beams using carbon-fiber-reinforced polymer laminates. Journal of Composites for Construction, 2005, 9(2): 158–169
CrossRef
Google scholar
|
[19] |
Khedr S A, Abou-Zeid M N. Characteristics of silica-fume concrete. Journal of Materials in Civil Engineering, 1994, 6(3): 357–375
CrossRef
Google scholar
|
[20] |
Dhir R K, Munday J, Ong L T. Investigations of the engineering properties of OPC/pulverised fuel ash concrete: Strength development and maturity. Proceedings of the Institution of Civil Engineers, 1984, 77: 239–254
|
[21] |
Murad Y, Abu-Haniyi Y, Alkaraki A, Hamadeh Z. An experimental study on cyclic behaviour of RC connections using waste materials as cement partial replacement. Canadian Journal of Civil Engineering, 2019, 46(6): 522–533
|
[22] |
Murad Y, AL-Bodour W, Abu-Hajar H. Cyclic behavior of RC beam-column joints made with sustainable concrete. International Review of Civil Engineering (IRECE), 2019, 10(6): 301
CrossRef
Google scholar
|
[23] |
Smith M. ABAQUS/Standard User’s Manual, Version 6.9. Providence, RI: Dassault Systèmes Simulia Corp, 2009
|
[24] |
Lubliner J, Oliver J, Oller S, Oñate E. A plastic-damage model for concrete. International Journal of Solids and Structures, 1989, 25(3): 299–326
CrossRef
Google scholar
|
[25] |
Lee J, Fenves G L. Plastic-damage model for cyclic loading of concrete structures. Journal of Engineering Mechanics, 1998, 124(8): 892–900
CrossRef
Google scholar
|
[26] |
Rabczuk T, Zi G, Bordas S, Nguyen-Xuan H. A simple and robust three-dimensional cracking-particle method without enrichment. Computer Methods in Applied Mechanics and Engineering, 2010, 199(37–40): 2437–2455
CrossRef
Google scholar
|
[27] |
Rabczuk T, Belytschko T. A three-dimensional large deformation meshfree method for arbitrary evolving cracks. Computer Methods in Applied Mechanics and Engineering, 2007, 196(29–30): 2777–2799
CrossRef
Google scholar
|
[28] |
Rabczuk T, Belytschko T. Cracking particles: A simplified meshfree method for arbitrary evolving cracks. International Journal for Numerical Methods in Engineering, 2004, 61(13): 2316–2343
CrossRef
Google scholar
|
[29] |
Rabczuk T, Zi G, Bordas S, Nguyen-Xuan H. A geometrically non-linear three-dimensional cohesive crack method for reinforced concrete structures. Engineering Fracture Mechanics, 2008, 75(16): 4740–4758
CrossRef
Google scholar
|
[30] |
Vu-Bac N, Lahmer T, Zhuang X, Nguyen-Thoi T, Rabczuk T. A software framework for probabilistic sensitivity analysis for computationally expensive models. Advances in Engineering Software, 2016, 100: 19–31
CrossRef
Google scholar
|
[31] |
Hamdia K M, Silani M, Zhuang X, He P, Rabczuk T. Stochastic analysis of the fracture toughness of polymeric nanoparticle composites using polynomial chaos expansions. International Journal of Fracture, 2017, 206(2): 215–227
CrossRef
Google scholar
|
[32] |
Hamdia K M, Msekh M A, Silani M, Thai T Q, Budarapu P R, Rabczuk T. Assessment of computational fracture models using Bayesian method. Engineering Fracture Mechanics, 2019, 205: 387–398
CrossRef
Google scholar
|
[33] |
Sümer Y, Aktaş M. Defining parameters for concrete damage plasticity model. Challenge Journal of Structural Mechanics, 2015, 1(3): 149–155
|
[34] |
Alfarah B, López-Almansa F, Oller S. New methodology for calculating damage variables evolution in Plastic Damage Model for RC structures. Engineering Structures, 2017, 132: 70–86
CrossRef
Google scholar
|
/
〈 | 〉 |