The Effect of infill walls on the seismic performance of boundary columns in reinforced concrete frames

Download

index.pdf

Date

2013

Author

Fenerci, Aksel

Metadata

Show full item record

Item Usage Stats

295
views

127
downloads

Reinforced concrete frames with unreinforced masonry infill walls constitute a significant portion of the building stock throughout the world. Infill walls in these buildings are generally considered as non-structural elements and neglected during design and assessment. On the other hand, observations after several earthquakes revealed that infill walls may have detrimental effects on the adjacent frame members. This observation brings out the requirement for further research on the effects of infill walls on the seismic performance of boundary columns. Additionally, current procedures for the design and assessment of such structures should be experimentally tested and validated along with the development of accurate numerical simulation tools is still in need for these purposes. In this study, seismic behavior of two test specimens which were designed, constructed and tested using the pseudo dynamic testing method in the Structural Mechanics Laboratory of Middle East Technical University are investigated. The two test frames were code conforming and seismically deficient frames. Numerical modeling of the test frames was conducted using DIANA (2008) finite element platform with the available constitutive models. The modeling approach was validated with the experimental results through comparisons. The analysis results are presented for a better understanding of the shear forces transferred from infill walls to the boundary columns. Seismic assessment of the two frames was conducted using ASCE/SEI 41-06 guidelines and the obtained results were compared to the damage observed during experiments. It was found that the presence of infill walls greatly altered the strength, stiffness, deformation capacity, ductility and failure mode of the reinforced concrete test frames. Significant amount of shear force transfer caused shear damage on boundary columns and decreased the ductility. ASCE/SEI 41-06 procedures for seismic assessment of reinforced concrete frames with infill walls are found as unsatisfactory in estimating the observed damage. Use of plastic hinge strains instead of average strain along the member length provided better estimations for boundary column damage levels.

Subject Keywords

Reinforced concrete construction., Structural frames., Earthquake resistant design., Finite element method.

URI

http://etd.lib.metu.edu.tr/upload/12616436/index.pdf
https://hdl.handle.net/11511/23076

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Evaluation of the Predictive Models for Stiffness, Strength, and Deformation Capacity of RC Frames with Masonry Infill Walls Turgay, Tahsin; Durmus, Meril Cigdem; Binici, Barış; Ozcebe, Guney (American Society of Civil Engineers (ASCE), 2014-10-01) Buildings with masonry infill walls (MIWs) in reinforced concrete (RC) frames are commonly used all around the world. It is well known that infill walls may affect the strength, stiffness, and displacement ductility of the structural system. Different approaches have been adopted in different codes and guidelines to consider the stiffness and strength contribution of MIWs on RC frame behavior. This study compares the ability of the existing guidelines to estimate stiffness, strength, and deformability of RC...
Effects of masonry infill walls on the seismic performance of buildings Öztürk, Mehmet Selim; Akyüz, Uğurhan; Department of Civil Engineering (2005) In Turkey, in most of the reinforced concrete buildings, hallow masonry infill walls are used as a non-structural element, during design stage, their contribution to overall building behavior is not well known. Observations made after the earthquakes revealed that these non-structural elements had beneficial effects on the lateral capacity of the building. In this study, the contribution of the hallow masonry infill walls to the lateral behavior of reinforced concrete buildings was investigated. For this pu...
Component based seismic vulnerability assessment procedure for rc buildings Erduran, Emrah; Yakut, Ahmet; Department of Civil Engineering (2005) A detailed seismic performance assessment procedure has been developed for reinforced concrete frame buildings with masonry in-fill walls and reinforced concrete frames including shear walls. The procedure uses member damage functions, in terms of inter-story drift ratios, developed for the primary components: columns, beams, in-fill walls and shear walls. Analytical investigations carried out to determine the influence of a number of parameters on the damageability of components were combined with existing...
Nonlinear analysis of reinforced concrete frame structures Çiftçi, Güçlü Koray; Polat, Mustafa Uğur; Department of Civil Engineering (2013) Reinforced concrete frames display nonlinear behavior both due to its composite nature and the material properties of concrete itself. The yielding of the reinforcement, the non-uniform distribution of aggregates and the development of cracks under loading are the main reasons of nonlinearity. The stiffness of a frame element depends on the combination of the modulus of elasticity and the geometric properties of its section - area and the moment of inertia. In practice, the elastic modulus is assumed to be ...
Quantifying seismic design criteria for concrete buildings Tüken, Ahmet; Atımtay, Ergin; Department of Civil Engineering (2004) The amount of total and relative sway of a framed or a composite (frame-shear wall) building is of utmost importance in assessing the seismic resistance of the building. Therefore, the design engineer must calculate the sway profile of the building several times during the design process. However, it is not a simple task to calculate the sway of a three-dimensional structure. Of course, computer programs can do the job, but developing the three-dimensional model becomes necessary, which is obviously tedious...

Citation Formats

A. Fenerci, “The Effect of infill walls on the seismic performance of boundary columns in reinforced concrete frames,” M.S. - Master of Science, Middle East Technical University, 2013.