scholarly journals Numerical Analysis of Masonry Assemblages through Simplified Micro-Modeling

2020 ◽  
Vol 20 (6) ◽  
pp. 7-13
Author(s):  
Dong-Jin Yoon ◽  
Kwang-Mo Lim ◽  
Joo-Ha Lee
Keyword(s):  
Performance Evaluation ◽  
Masonry Wall ◽  
Nonlinear Static Analysis ◽  
Analysis Method ◽  
Equivalent Strut ◽  
Reinforced Masonry ◽  
Micro Modeling ◽  
Nonlinear Static ◽  
Evaluation Techniques ◽  
Significant Attention

Recently, research focused on preventing the aging of masonry structures, and minimization of damage caused by earthquakes to these structures has gained significant attention. To improve the performance of these structures, an appropriate method is required for their performance evaluation. Generally, the equivalent strut model is employed for the performance evaluation of a masonry wall. However, this method is known to have limitations in implementing reinforced masonry and in reflecting the actual reinforcement effect. Appropriate evaluation techniques should be developed to implement the performance improvement methods developed in the future. Therefore, in this study, analysis methods were developed considering the nonlinear static analysis method for masonry elements. In addition, using these methods, the analysis considering the various reinforced thicknesses and shapes was performed, and the appropriate reinforcement methods were presented for these structures.

scholarly journals Practical Nonlinear Analysis for Limit Design of Reinforced Masonry Walls

2012 ◽  
Vol 6 (1) ◽  
pp. 107-118
Author(s):  
Andres Lepage ◽  
Reynaldo E. Sanchez
Keyword(s):  
Seismic Design ◽  
Design Method ◽  
Shear Walls ◽  
Nonlinear Static Analysis ◽  
Masonry Walls ◽  
Base Shear ◽  
Output Data ◽  
Reinforced Masonry ◽  
Modeling Techniques ◽  
Nonlinear Static

Two modeling techniques for practical nonlinear static analysis are implemented to support the development and usage of a new Limit Design method for special reinforced masonry shear walls. The new seismic design alternative is under consideration for future versions of the building code requirements for masonry structures in the U.S. The proposed simplified models were applied to a planar one-story wall with two openings and the relevant output data from nonlinear static analyses were compared to the output from a refined computer model. Results of the comparison in-dicate that the proposed models were sufficiently accurate in determining the usable base-shear strength of the perforated wall.

Nonlinear Static Analysis of RC Shear Wall Structure Based on Opensees

2010 ◽  
Vol 163-167 ◽  
pp. 1425-1430
Author(s):  
Zhi Hong Pan ◽  
Ai Qun Li ◽  
Yi Gang Sun
Keyword(s):  
Static Analysis ◽  
Shear Wall ◽  
Constitutive Law ◽  
Nonlinear Static Analysis ◽  
Displacement Curve ◽  
Analysis Method ◽  
Perforated Wall ◽  
Nonlinear Static ◽  
Load Displacement ◽  
Rc Shear Wall

To study the seismic performance of RC shear wall, and to develop its fine nonlinear analysis method, systemic studies on nonlinear static analysis and it’s realization method are carried out. Beginning with rotating-angle softened-truss model for coupled shear and flexural responses, analytical model of solid wall is presented based on the comparative study on four types of constitutive law of concrete for confined concrete of boundary zone. Good agreements between analytical and experimental results of load-displacement relation are found, which indicates that the proposed analytical method can reflect the global mechanical behavior of shear wall well. Studies on coupling beam and global perforated wall modeling are implemented, then modeling approach and nonlinear static analysis method for perforated wall are proposed. Comparing analytical load-displacement curve to experimental, initial stiffness and first turning point agree well and analytical ultimate capacity is close to experimental, which is shown that the load-displacement curve can actually exhibit the general load-displacement trend of perforated wall.

scholarly journals Optimum Performance-Based Design Of Unsymmetrical 2D Steel Moment Frame

2021 ◽  
Author(s):  
Arezoo Asaad Samani ◽  
Seyed Rohollah Hoseini Vaez ◽  
Mohammad Ali Fathali
Keyword(s):  
Lateral Loading ◽  
Performance Based Design ◽  
Nonlinear Static Analysis ◽  
Second Step ◽  
Analysis Method ◽  
Moment Frame ◽  
Steel Moment Frame ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting ◽  
Nonlinear Static

Abstract The most commonly used analysis method in performance-based design (PBD) is the nonlinear static analysis (NSA). In unsymmetrical 2D frames, unlike its symmetrical state, NSA should be performed in two lateral loading directions, which complicates the process of achieving a feasible optimal design in addition to increasing the volume of calculations. In this study, a two-step approach is proposed for the design of unsymmetrical 2D steel moment-resisting frames (SMRF). In this approach, in two independent steps, the structure is analyzed with lateral loading pattern based on the first mode shape in positive and negative direction, respectively. The implementation of the second step is conditional on the satisfactory completion of the first step. The objective function takes into account the differences between successful and unsuccessful steps. The constraints considered are based on the acceptance criteria for SMRFs according to FEMA-356 at each performance level. The effectiveness of the proposed approach has been investigated by employing four meta-heuristic optimization algorithms to determine the optimum design for case studies of SMRF structures having three and nine stories.

scholarly journals Effect of Buttress Form on Transverse Seismic Resistance of High Masonry Walls

2021 ◽  
Author(s):  
M. Arif Gürel ◽  
Rabia İzol ◽  
Çağrı Mollamahmutoğlu ◽  
R. Kadir Pekgökgöz ◽  
F. Şebnem Kuloğlu Yüksel ◽  
...  
Keyword(s):  
Calculation Model ◽  
Nonlinear Static Analysis ◽  
Seismic Resistance ◽  
Masonry Walls ◽  
Analysis Method ◽  
Base Shear ◽  
Basic Model ◽  
Historical Masonry ◽  
Nonlinear Static ◽  
Modelling Approach

Abstract In historical masonry structures having vault, dome and high walls, for safety against gravity, wind and earthquake loads, buttresses are crucial elements. This study aims to investigate the effect of buttress form on the transverse seismic resistance of high masonry walls. For this purpose, a real historical masonry structure covered by a barrel vault, and has a simple and regular plan and elevation shape was considered. From a slice of this structure, a calculation model and a basic model were created. For the masonry, macro-modelling approach was used. Nonlinear static analysis method was adopted, and finite element modeling and calculations were carried out using the Abaqus program. Firstly, on the calculation model the effect of buttress depth on transverse seismic resistance was investigated, and it was seen that the resistance is almost linearly related to the buttress depth. Then, two groups of analyses were performed on the models obtained by mounting different buttress forms to the basic model. In the first group, the volumes of the buttresses were kept equal, and in the second group their base depths and thicknesses were taken equally. At the end of these analyses, by comparing the base shear forces obtained for the models, the effectiveness of buttress form on the transverse seismic resistance has been determined and evaluated. The results revealed that the model with curvilinear concave buttresses in the first group analyses and the model with semi-cylindrical buttresses in the second group analyses have the highest seismic resistance.

Evaluation of Earthquake-Damaged Concrete and Masonry Wall Buildings

2000 ◽  
Vol 16 (1) ◽  
pp. 263-283 ◽  
Author(s):  
Joe Maffei ◽  
Craig D. Comartin ◽  
Brian Kehoe ◽  
Gregory R. Kingsley ◽  
Bret Lizundia
Keyword(s):  
Seismic Performance ◽  
Nonlinear Deformation ◽  
Masonry Wall ◽  
Analysis Procedure ◽  
Nonlinear Static Analysis ◽  
Remedial Measures ◽  
Concrete Wall ◽  
Applied Technology ◽  
Nonlinear Static ◽  
Performance Capability

Efforts at improving earthquake recovery policies have been hampered by a lack of criteria and standards for evaluating and repairing damaged buildings. The Applied Technology Council has developed a performance-based methodology for the evaluation of earthquake-damaged concrete wall buildings and masonry wall buildings, recently published as FEMA 306/307/308. The methodology provides a way to quantify damage in terms of loss of seismic performance capability. It also provides guidelines for remedial measures to restore or improve seismic performance capability. In this methodology, the expected future seismic performance of a building is evaluated in its pre-event, damaged, and repaired conditions. Following the nonlinear static analysis procedure, displacement demands and capacities of the structure are used as indices of seismic performance. Identifying the governing mechanism of nonlinear deformation and the behavior mode of a structure and its components is shown to be a necessary first step towards evaluating expected seismic performance, interpreting indications of damage, and assessing their significance. The methodology provides a technical resource for understanding how buildings respond seismically on both global and component levels, and gives a basis for formulating post-earthquake policies.

Nonlinear Finite Element Analysis of Unreinforced Masonry Walls

2016 ◽  
Vol 857 ◽  
pp. 142-147
Author(s):  
S. Thomas Feba ◽  
Bennet Kuriakose
Keyword(s):  
Numerical Model ◽  
Unreinforced Masonry ◽  
Masonry Wall ◽  
Seismic Retrofitting ◽  
Nonlinear Static Analysis ◽  
Masonry Walls ◽  
Masonry Structures ◽  
Element Analysis ◽  
Historical Masonry ◽  
Nonlinear Static

Most of the monumental structures worldwide and residential structures in developing countries are built in masonry. The studies performed by various researchers prove the vulnerability of masonry structures under various circumstances, especially under earthquakes, so as to necessitate detailed contemplation. In this paper, a numerical model for nonlinear static analysis of unreinforced masonry walls is developed based on a macro-modelling approach. A detailed parametric study is also performed to analyse the effect of wall thickness as well as length on the behaviour of the masonry wall. The present numerical model can be utilized for risk assessment and seismic retrofitting of historical masonry structures.

Sign in / Sign up

Export Citation Format

Share Document