Implementation of Database of Masonry Walls Test – Review of Existing Test Data in Peru

2014 ◽  
Vol 9 (6) ◽  
pp. 993-1000 ◽  
Author(s):  
Lourdes Cardenas ◽  
◽  
Roy Reyna ◽  
Lucio Estacio ◽  
Carlos Zavala ◽  
...  
Keyword(s):  
Earthquake Engineering ◽  
Design Procedure ◽  
Shear Capacity ◽  
Disaster Mitigation ◽  
Masonry Walls ◽  
Web Interface ◽  
Limit States ◽  
Confined Masonry ◽  
Test Review ◽  
Semi Empirical

Confined masonry walls represent one of the most widely used construction systems for dwellings in Peru and other Latin countries. This study describes the procedure for implementing a database with a web interface of results collected from the experiments conducted over the years by the Japan Center for Earthquake Engineering and Disaster Mitigation. This paper attempts to contribute to the seismic design procedure of this type of structure, and parameters such as stiffness ratios and the deformation (drift) for the characteristic stages of confined masonry walls under different limit states or performance levels are proposed. Also, a semi-empirical equation for estimating the shear capacity using the database is proposed.

scholarly journals Development of analytical models for confined masonry walls based on experimental results in Lima city

2019 ◽  
Vol 29 (2) ◽  
Author(s):  
Miguel Diaz ◽  
Carlos Zavala ◽  
Erika Flores ◽  
Lourdes Cardenas
Keyword(s):  
Earthquake Engineering ◽  
Shear Failure ◽  
Slenderness Ratio ◽  
Experimental Results ◽  
Disaster Mitigation ◽  
Analytical Models ◽  
Masonry Walls ◽  
Capacity Curve ◽  
Confined Masonry ◽  
Different Types

For 30 years the Structural Laboratory of the Peru Japan Center for Earthquake Engineering Research and Disaster Mitigation (CISMID) from the Faculty of Civil Engineering (FIC) of the National University of Engineering (UNI) is been testing different types of structural system, mainly confined masonry walls. In that sense, large number of experiments have been conducted in confined masonry walls. Analytical model for capacity curve is presented for walls with different types of masonry units, such as industrial hollow bricks, solid handmade bricks and tubular bricks which are the most representative units in Metropolitan Lima and Callao. Tetra-linear models are calibrated with experimental results in order to provided generalized model in terms of sensitive parameters which determines the capacity curve for flexural shear failure mechanism, such as longitudinal and transversal steel ratio, slenderness ratio and axial load ratio where shear stress is observed in the cracking, yielding, maximum and ultimate points.

Out-of-Plane Design Procedure for Confined Masonry Walls

2016 ◽  
Vol 142 (2) ◽  
pp. 04015126 ◽  
Author(s):  
Joel Moreno-Herrera ◽  
Jorge Varela-Rivera ◽  
Luis Fernandez-Baqueiro
Keyword(s):  
Design Procedure ◽  
Masonry Walls ◽  
Confined Masonry ◽  
Out Of Plane

scholarly journals DAMAGE LIMIT STATES FOR CONFINED MASONRY WALLS BASED ON EXPERIMENTAL TEST

2019 ◽  
Vol 29 (2) ◽  
Author(s):  
Carlos Zavala Toledo
Keyword(s):  
Limit State ◽  
Experimental Studies ◽  
Full Scale ◽  
Masonry Walls ◽  
Full Scale Test ◽  
Design Standards ◽  
Limit States ◽  
Confined Masonry ◽  
Wall Structures ◽  
Scale Test

Non engineering dwellings represents 83% of the stock of housing in emerging areas of Lima city. These dwellings are build with non-appropriated masonry bricks with walls that limits don´t meet the displacement control of the earthquake design standards NTE-030 and NTE-070. Considering the database of structural test of 33 years of experimental studies of the Structural Laboratory of CISMID, typical behavior curves are studied in order to propose damage limit state for masonry walls: build with industrial bricks, build with handmade bricks and build with horizontal hollow tubular bricks. Also, results of full-scale test on masonry house performed in the laboratory are studied. Ranges of inelastic development limit states of walls are proposed from the test results of full-scale test of the three types of masonry. Big difference in the capacity of walls with tubular bricks in comparison with the others types are found. Also limit drift values threshold are propose to be use in the analytical modelling of wall structures with handmade or tubular bricks. These proposal limits are smaller than the limit of NTE-030 standard.

scholarly journals SHEAR CAPACITY PREDICTION OF CONFINED MASONRY WALLS SUBJECTED TO CYCLIC LATERAL LOADING

2008 ◽  
Vol 64 (4) ◽  
pp. 692-704 ◽  
Author(s):  
Abdelkrim BOURZAM ◽  
Tetsuro GOTO ◽  
Masakatsu MIYAJIMA
Keyword(s):  
Shear Capacity ◽  
Lateral Loading ◽  
Masonry Walls ◽  
Confined Masonry ◽  
Capacity Prediction

Influence of Human Error on Structural Reliability

2017 ◽  
Author(s):  
Eric Brehm ◽  
Robert Hertle ◽  
Markus Wetzel
Keyword(s):  
Human Error ◽  
Structural Reliability ◽  
Failure Modes ◽  
Structural Model ◽  
Limit State ◽  
Design Procedure ◽  
Material Strength ◽  
Limit States ◽  
The Impact

In common structural design, random variables, such as material strength or loads, are represented by fixed numbers defined in design codes. This is also referred to as deterministic design. Addressing the random character of these variables directly, the probabilistic design procedure allows the determination of the probability of exceeding a defined limit state. This probability is referred to as failure probability. From there, the structural reliability, representing the survival probability, can be determined. Structural reliability thus is a property of a structure or structural member, depending on the relevant limit states, failure modes and basic variables. This is the basis for the determination of partial safety factors which are, for sake of a simpler design, applied within deterministic design procedures. In addition to the basic variables in terms of material and loads, further basic variables representing the structural model have to be considered. These depend strongly on the experience of the design engineer and the level of detailing of the model. However, in the clear majority of cases [1] failure does not occur due to unexpectedly high or low values of loads or material strength. The most common reasons for failure are human errors in design and execution. This paper will provide practical examples of original designs affected by human error and will assess the impact on structural reliability.

scholarly journals Effect of local instability on fire response of steel beams

2017 ◽  
Vol 1 (2) ◽  
pp. 170-179 ◽  
Author(s):  
Venkatesh Kodur ◽  
Mohannad Z. Naser
Keyword(s):  
Shear Loading ◽  
Shear Capacity ◽  
Valuable Insight ◽  
High Shear ◽  
Local Instability ◽  
Steel Girders ◽  
Fire Response ◽  
Limit States ◽  
Flexural Mode ◽  
Content Type

Purpose This purpose of this paper is to quantify the effect of local instability arising from high shear loading on response of steel girders subjected to fire conditions. Design/methodology/approach A three-dimensional nonlinear finite element model able to evaluate behavior of fire-exposed steel girders is developed. This model, is capable of predicting fire response of steel girders taking into consideration flexural, shear and deflection limit states. Findings Results obtained from numerical studies show that shear capacity can degrade at a higher pace than flexural capacity under certain loading scenarios, and hence, failure can result from shear effects prior to attaining failure in flexural mode. Originality/value The developed model is unique and provides valuable insight (and information) to the fire response of typical hot-rolled steel girder subjected to high shear loading.

In-plane response of unreinforced masonry walls confined by reinforced concrete tie-columns and tie-beams

2017 ◽  
Vol 20 (11) ◽  
pp. 1632-1643 ◽  
Author(s):  
Masoud Amouzadeh Tabrizi ◽  
Masoud Soltani
Keyword(s):  
Numerical Study ◽  
Nonlinear Behavior ◽  
Numerical Approach ◽  
Masonry Wall ◽  
Masonry Walls ◽  
Lateral Loads ◽  
Confined Masonry ◽  
Smeared Crack ◽  
Modeling Strategy ◽  
Reversed Cyclic

This article focuses on the experimental and analytical investigations of masonry walls surrounded by tie-elements under in-plane loads. The experimental results of an unconfined and a confined masonry wall, tested under reversed cyclic lateral loads, are presented. For numerical study, a micro-modeling strategy, using smeared-crack-based approach, is adopted. In order to validate the numerical approach, experimental test results and data obtained from the literature are used, and through a systematic parametric study, the influence of adjoining walls and number of tie-columns on the seismic behavior of confined masonry panels is numerically assessed and a simple but rational method for predicting the nonlinear behavior of these structures is proposed.

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