AN ANALYTICAL APPROACH FOR ASSESSMENT OF THE EFFECTS OF INFILL PANELS IN RC FRAMES

2014 ◽  
Author(s):  
S. Casolo ◽  
F. Porco ◽  
G. Uva
Keyword(s):  
Analytical Approach ◽  
Rc Frames ◽  
Infill Panels

Influence of Masonry Infills on the Shear Forces of RC Framed Structures

2016 ◽  
Vol 847 ◽  
pp. 361-368 ◽  
Author(s):  
Daniele Perrone ◽  
Vincenzo Saponaro ◽  
Marianovella Leone ◽  
Maria Antonietta Aiello
Keyword(s):  
Mechanical Properties ◽  
Young Modulus ◽  
Shear Forces ◽  
Seismic Behaviour ◽  
Masonry Infills ◽  
Rc Frames ◽  
Infill Panels ◽  
Rc Framed Structures ◽  
Global And Local ◽  
Modelling Approach

The damages observed during the earthquakes occurred in the last decades have clearly shown as the influence of infill panels on the seismic behaviour of Reinforced Concrete (RC) buildings should be taken into account; the global stiffness and the strength of the RC frames are significantly modified by the infills. In the present study the influence of infills in terms of shear forces has been analyzed by means of linear static analysis; a parametric study has been carried out to evaluate the behavior of infilled frames varying both modelling approach and the mechanical properties of the masonry infills. In terms of modelling approach the single and multi-strut models have been adopted; the Young modulus of masonry infills have been varied in the common range proposed in literature. The results show that multi-strut approach is able to predict both global and local behavior. In addition, the importance of the mechanical properties of masonry infills in the evaluation of the elastic period and shear force in the columns is underlined.

FE modelling of RC frames with masonry infill panels under in-plane and out-of-plane loading

2013 ◽  
Vol 51 ◽  
pp. 73-87 ◽  
Author(s):  
Alireza Mohyeddin ◽  
Helen M. Goldsworthy ◽  
Emad F. Gad
Keyword(s):  
Fe Modelling ◽  
Masonry Infill ◽  
Rc Frames ◽  
Infill Panels ◽  
Out Of Plane

scholarly journals Numerical Assessment of URM Infilled RC Frames Retrofitted With Near-Surface Mounted Reinforcing Steel Bars

2020 ◽  
Vol 6 ◽  
Author(s):  
Rajendra Soti ◽  
Andre R. Barbosa ◽  
Andreas Stavridis
Keyword(s):  
Finite Element ◽  
Nonlinear Finite Element ◽  
Cohesive Crack ◽  
Reinforcing Steel ◽  
Near Surface ◽  
Rc Frames ◽  
Infill Panels ◽  
Steel Bars ◽  
Near Surface Mounted ◽  
Infilled Rc Frames

This paper presents a study on a retrofit technique for masonry infilled reinforced concrete (RC) frames. The proposed retrofit technique involves the addition of reinforcing steel bars into epoxy-filled pre-cut grooves on the surface of infill walls. The feasibility of the developed technique is initially investigated experimentally through pull-out tests conducted on near-surface mounted (NSM) reinforcing steel bars. The experimental results are used to augment an existing nonlinear finite element modeling approach used to simulate the response of RC frames with the retrofitted infill panels and to calibrate the numerical models developed. The nonlinear finite element models employ smeared-crack and zero-thickness cohesive-crack interface elements to model the RC members and masonry infills, while nonlinear truss elements are used to model the reinforcing steel bars. The modeling scheme is used to numerically simulate the performance of one- and two-bay infilled RC frames with a variety of reinforcing steel retrofit configurations under lateral loads. The results indicate that the retrofit solution can improve the deformation capacity of existing infilled frames, and its effectiveness depends on the orientation and the distribution of the NSM reinforcement steel bars that are added to the infill panels.

Behaviour of Reinforced Concerete Infilled Frames Under Seismic Loads

2013 ◽  
Vol 61 (3) ◽  
Author(s):  
A. Kadid ◽  
S. Noui ◽  
A. Zine ◽  
D. Yahiaoui
Keyword(s):  
Seismic Risk ◽  
Structural Response ◽  
Seismic Loads ◽  
Structural Components ◽  
Seismic Evaluation ◽  
Lateral Capacity ◽  
Rc Frames ◽  
Infill Panels ◽  
Frame Buildings ◽  
Algerian Seismic Code

A significant portion of the buildings constructed in Algeria is structural frames with infill panels which are usually considered as non structural components and are neglected in the analysis. However, these masonry panels tend to influence the structural response. Thus, these structures can be regarded as seismic risk buildings, although in the Algerian seismic code there is little guidance on the seismic evaluation of infilled frame buildings. In this study, three RC frames with 2, 4 and 8 storey and subjected to three recorded Algerian accelerograms are studied. The diagonal strut approach is adopted for modeling the infill panels and a fiber model is used to model RC members. This paper reports on the seismic evaluation of RC frames with brick infill panels. The results obtained show that the masonry panels enhance the load lateral capacity of the buildings and the infill panel configuration influences the response of the structures.

Seismic Performance and Lateral Stability of RC Frames with Vertical Irregular Infill Arrangements

2017 ◽  
Vol 17 (02) ◽  
pp. 1750025 ◽  
Author(s):  
Terry Y. P. Yuen ◽  
J. S. Kuang
Keyword(s):  
Seismic Performance ◽  
Failure Modes ◽  
Dynamic Properties ◽  
Cohesive Crack ◽  
Lateral Stability ◽  
Infill Wall ◽  
Rc Frames ◽  
Infill Panels ◽  
Force Transfer ◽  
Transfer Mechanisms

In this paper, the effects of vertical irregularity of masonry-infill wall arrangements on the seismic performance and lateral stability of reinforced concrete (RC) frames have been investigated using nonlinear response history analysis. Discrete finite element models, which are endowed with a damage-based cohesive crack modeling, were developed for six prototype structures with different arrangements of infill panels. The analysis of failure modes and lateral force transfer mechanisms of infilled frames shows that the arrangement of infill panels can critically affect the dynamic properties and structural stability under seismic excitations. Diagonal continuity, infill ratios, and eccentricity of infill walls play essential roles in the lateral-load and displacement capacities of the structures. The hysteresis behavior, failure modes, and force transfer mechanisms of RC frames with concentric and eccentric arrangements of infill panels are compared and their implications on the seismic resistant design are discussed.

scholarly journals Seismic Vulnerability for RC Infilled Frames: Simplified Evaluation for As-Built and Retrofitted Building Typologies

Buildings ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 137 ◽  
Author(s):  
Marco Gaetani d’Aragona ◽  
Maria Polese ◽  
Marco Di Ludovico ◽  
Andrea Prota
Keyword(s):  
Sensitivity Analysis ◽  
Seismic Vulnerability ◽  
Limit State ◽  
Relative Efficacy ◽  
Seismic Capacity ◽  
Rc Frames ◽  
Infill Panels ◽  
Gravity Load ◽  
Damage Limitation ◽  
Safety Limit

Several studies investigated the influence of infills on the response of reinforced concrete (RC) frames. However, possible shear brittle failures are generally neglected. The interaction between the infill panels and the surrounding frames can lead to anticipated brittle-type failures that should be considered in code-based assessment of lateral seismic capacity. This paper investigates, by means of simplified pushover analyses, on the effect of infills on the lateral seismic capacity explicitly considering possible brittle failures in unconfined beam-column joints or in columns. Archetype buildings representative of existing gravity load designed (GLD) RC frames of three different height ranges are obtained with a simulated design process and a sensitivity analysis is performed to investigate on the effect of infill consistency on the capacity. Moreover, possible alternative local retrofit interventions devoted to avoiding brittle failures are considered, evaluating their relative efficacy in case of different infill typologies. It is seen that for the considered existing GLD buildings, the attainment of life safety limit state is premature and happens before the damage limitation limit state. The capacity can be increased with application of local retrofit interventions. However, the retrofit efficacy varies depending on the infills consistency if the horizontal action transferred from the infills to the surrounding frame is not absorbed by the retrofit solution.

scholarly journals Performance evaluation of masonry Infilled RC frame structures under lateral loads

2021 ◽  
Vol 73 (03) ◽  
pp. 219-234
Keyword(s):  
Structural Damage ◽  
Evaluation Method ◽  
Rc Frame ◽  
Lateral Loads ◽  
Masonry Infill ◽  
Rc Frames ◽  
Entire Structure ◽  
Infill Panels ◽  
Energy Dissipation Capacity ◽  
Rc Frame Structures

Numerous studies on masonry infill panels have greatly contributed to the research of strength, stiffness and energy dissipation capacity of various buildings. If the effects of masonry panels are disregarded, structural damage will occur under any significant ground motion, and even lead to collapse of the entire structure. The mode of failure is strongly dependent on the masonry and RC frame interaction. This work proposes an evaluation method for determining the participation ratio of masonry infill panels on RC frames under lateral loads.

Sign in / Sign up

Export Citation Format

Share Document