Performance of shear wall with external reinforcement by CFRP and steel sheets against blast load

Shirinzadeh, M.; Haghollahi, Abbas

doi:10.21595/jve.2016.16558

Cited by 4 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be mentioned that this method of analysis is perfect for dynamic phenomena that occur very fast, such as collisions, explosions, or impact loads or non-linear problems in which the contact conditions change, such as shaping. Earlier researches proved that the concrete damage plasticity will show the behavior of the concrete reliably [21], so this nonlinear behavioral model is used for concrete. The elements types are the same as those described in the validation section.…”

Section: Methods Of Analysismentioning

confidence: 99%

Retrofit of reinforced concrete structures by CFRP/GFRP sheets against blast load

Shooshtari¹,

Gomar²

2017

Math. models, eng.

View full text Add to dashboard Cite

Nowadays, destructive bomb effects and terroristic attacks to buildings have become a challenge for structure engineers. Reinforcement of structures with composite materials has been extensively increased in recent decays, because of their individual and unique characteristics like high impact strength, flexibility, high-weight ratios, etc. The technique of wrapping concrete with CFRP/GFRP sheets can significantly increase its axial load capacity, flexibility and seismic behavior of columns in the plastic hinge areas or overlapping regions of column bars. In this research, blast phenomena and its effects on buildings will be analytically investigated. CFRP/GFRP sheets will be applied to the retrofitted building frames and their performance in strengthening structural members will be studied. The concrete nonlinearity behavior is considered in using concrete damage plasticity model and CFRP/GFRP sheet has been assumed to be elastic and isotropic, while steel retrofitting bars have elasto-plastic behavior. For validation of analytical results, a model has been compared with a series of experimental results, and good agreements have been obtained. Results show that external reinforcement increases energy absorption of the system up to three times, and in this case, reinforcement by CFRP sheets represents better performance. In addition, it is shows that external reinforcement of connections leads to decrease total displacement of the frame up to 40 %. Moreover, effects of the number of reinforcement layers are considered.

show abstract

Section: Methods Of Analysismentioning

confidence: 99%

Retrofit of reinforced concrete structures by CFRP/GFRP sheets against blast load

Shooshtari¹,

Gomar²

2017

Math. models, eng.

View full text Add to dashboard Cite

show abstract

“…The C3D8R element considers large rotations and FE strains more accurately, making it possible to easily change the numerical model's thickness. Therefore, it is suitable for analyzing models with large strains, materials whose effective Poisson ratio is non-zero, and in cases where geometric nonlinearity of materials may occur (Shirinzadeh & Haghollahi, 2016). The cross-sectional characteristics are calculated using multiple four-node integrals in the plate thickness.…”

Section: Boundary Conditions Meshing and Component Integrationmentioning

confidence: 99%

Performance of composite shear walls strengthened with FRP and subjected to blast load

Hosseini,

Li,

Hosseini

et al. 2023

rdlc

View full text Add to dashboard Cite

The present paper aims to explore the performance of composite shear walls reinforced with Fiber Reinforced Polymer (FRP) sheets, subjected to blast loads. The finite-element method (FEM) implemented in the ABAQUS software is used to evaluate several numerical models to meet this objective. The parametric behavior of the system under the effect of blast load intensity was investigated, along with the FRP sheet material, concrete compressive strength, and also the geometric characteristics of wall components such as its thickness, spacing of FRP sheets, and thickness of the cross-sectional shape of the steel plates under the effect of blast load. It was found that the reinforcement of the composite shear wall by incorporating FRP sheets not only increases the stress absorption in the wall but also increases the load transfer capacity and leads to high energy dissipation using the polymer fibers. It has been found that carbon polymer sheets (CFRP) and glass polymer sheets (GFRP) have, respectively, the best and the weakest performance in shear wall stress absorption compared to AFRP sheets, and this is due to the tensile strength and low density of CFRP sheets. As the thickness of FRP sheets increases, the stress, strain and displacement created in the composite shear wall decrease, owing to the increase of the final strength, which is, in turn, the result of the increase in fiber thickness.

show abstract

“…Two incidences are the attack of the Murrah Federal Building (Corley and Asce, 2004) or an accidental blast event in Tianjin Harbour-China, where the building was severely damaged with 165 casualties and a direct economic loss of RMB 6.866bn (Qin et al , 2017). Several resistant and protective systems, such as steel frames and steel plate shear walls (SPSWs), have been designed against explosive loads (Shirinzadeh and Haghollahi, 2016; Ostadhossein and Lotfi, 2018). Furthermore, many tall buildings use steel elements as their main material; hence, evaluating the performance and damage of steel members under blast loading is essential.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies have been conducted to investigate the vulnerability and damage of steel elements under extreme loading scenarios (Zheng et al , 2019; Stewart and Morrill, 2015; Shirinzadeh and Haghollahi, 2016; Longère et al , 2013). Several studies (Louca et al , 1998; Neuberger et al , 2007; Ostadhossein and Lotfi, 2018; Tag and Ngo, 2016; Tavakoli and Kiakojouri, 2014; Jacob et al , 2004; Langdon et al , 2005) focused on the response of steel plates subjected to blast loading.…”

Section: Introductionmentioning

confidence: 99%

Computational predictions for predicting the performance of steel 1 panel shear wall under explosive loads

Shishegaran

Karami

Danalou

et al. 2021

View full text Add to dashboard Cite

Purpose The resistance of steel plate shear walls (SPSW) under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the conventional weapons effect program (CONWEP) model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a multiple linear regression (MLR), multiple Ln equation regression (MLnER), gene expression programming (GEP), adaptive network-based fuzzy inference (ANFIS) and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Design/methodology/approach The SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Findings The resistance of SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Originality/value The resistance of SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads.

show abstract

Performance of shear wall with external reinforcement by CFRP and steel sheets against blast load

Cited by 4 publications

References 13 publications

Retrofit of reinforced concrete structures by CFRP/GFRP sheets against blast load

Retrofit of reinforced concrete structures by CFRP/GFRP sheets against blast load

Performance of composite shear walls strengthened with FRP and subjected to blast load

Computational predictions for predicting the performance of steel 1 panel shear wall under explosive loads

Contact Info

Product

Resources

About