Seismic Analysis of a Masonry Structure Retrofitting

2013 ◽  
Vol 671-674 ◽  
pp. 1423-1428
Author(s):  
Jing Hai Yu ◽  
Shan Shan Zhao ◽  
Ning Ning Yu
Keyword(s):  
Seismic Design ◽  
Seismic Analysis ◽  
Masonry Structure ◽  
Seismic Resistance ◽  
Seismic Capacity ◽  
Seismic Code ◽  
Before And After

According to the current seismic code, we model one project in PKPM, analysis the seismic resistance of the masonry structure with rigidity and flexibility floor, and study the earthquake shear and seismic capacity compared before and after such structural load changes and retrofitting. And the analysis conclusion can provide the reference of seismic design of such structures.

Anti-Seismic Capacity Analysis and Structural Appraisal & Reinforcement of a Multi-Story Masonry Building with Load-Bearing of Longitudinal Wall

2011 ◽  
Vol 243-249 ◽  
pp. 466-471
Author(s):  
De Yun Ma ◽  
Yong Zhi Zuo ◽  
Hai Wen Teng ◽  
Da Huo
Keyword(s):  
Wenchuan Earthquake ◽  
Seismic Design ◽  
Seismic Behavior ◽  
Masonry Structure ◽  
Capacity Analysis ◽  
Masonry Building ◽  
Structural System ◽  
Seismic Capacity ◽  
Load Bearing ◽  
Longitudinal Wall

Based on the analysis for damages of masonry structure from Wenchuan earthquake, the seismic behavior of multi-story masonry school building is analyzed, and the seismic behavior with load-bearing structural system of longitudinal wall is mainly discussed. Based on the analysis and study, several problems which need more attention to the seismic appraisal and reinforcing design are pointed out, and finally the differences and correlation of seismic appraisal, as well as seismic design are discussed.

Seismic Capacity Evaluation of Masonry Structures of Primary School Buildings

2011 ◽  
Vol 255-260 ◽  
pp. 2637-2642
Author(s):  
Bo Cao ◽  
Yu Bai ◽  
Wen Pan ◽  
Jian Rong Yang
Keyword(s):  
Statistical Analysis ◽  
Secondary School ◽  
Masonry Structure ◽  
Seismic Resistance ◽  
School Buildings ◽  
Masonry Structures ◽  
Seismic Capacity ◽  
Structure Building ◽  
Capacity Evaluation ◽  
Primary And Secondary School

Taking primary and secondary school buildings of Kunming seismic capacity evaluation results as the research object, both for the identification of the masonry structure building appraisal result of statistical analysis, the assessment that is seismic resistance condition of such housing is given in this paper. Through analyzing and summarizing the structure performance problems of the buildings, the evaluation and reinforcement work for this type of structure can be provided in the future.

Finite Element Analysis of Seismic Resistance of Masonry Structure in Rural China

2013 ◽  
Vol 827 ◽  
pp. 328-333 ◽  
Author(s):  
Fang Tang
Keyword(s):  
Finite Element ◽  
Rural Areas ◽  
Seismic Analysis ◽  
Rural China ◽  
Failure Criteria ◽  
Seismic Resistance ◽  
Masonry Structures ◽  
Seismic Capacity ◽  
Element Analysis ◽  
Finite Element Software

Buildings with masonry structures in rural areas of China have been the most severely damaged ones in earthquake disasters. This paper has analyzed the failure characteristics of rural masonry buildings in earthquake by summarizing the existing researches of the seismic resistance of masonry structures in rural areas, with its focus on the research of the intensity from VI to X. The constitutive relation model of damage developed by Yang Weizhong is used for the seismic analysis of rural masonry structures in combination with the failure criteria for masonry structures. The finite element software ANSYS is applied for the simulation and the results show that the damage of China's rural masonry structures regularly tends to weaken from the bottom to the top, with the seismic capacity of horizontal walls superior to longitudinal walls. As for vertical walls, due to their weak capacity, damage immediately occurs to them even in medium intensity earthquakes.

An Experimental Study on Seismic Performance of Reinforced Masonry Structure with Small-Sized Concrete Hollow Blocks

2010 ◽  
Vol 163-167 ◽  
pp. 4008-4013
Author(s):  
Hai Biao Wang ◽  
Xun Guo ◽  
Bao Kuan Li ◽  
Hai Xu Yang
Keyword(s):  
Seismic Performance ◽  
Structural Model ◽  
Seismic Intensity ◽  
Masonry Structure ◽  
Seismic Resistance ◽  
Seismic Capacity ◽  
Earthquake Intensity ◽  
Reinforced Masonry ◽  
Displacement Angle ◽  
Constructional Column

This paper focuses on the analysis of dynamic characteristics of structural systems, maximum response of acceleration and maximum inter-story displacement angle etc. so as to study the seismic performance, yielding mechanism and seismic resistance capacity of the structure under the circumstance of constructional measures of seismic intensity VII through an earthquake shake table test on a model of a six-story reinforced masonry structure with small-sized concrete hollow blocks. In view of the whole test process, the integral deformation of the reinforced masonry structural model under the influence of seismic vibration is predominantly bending deformation. While inputting different earthquake intensity, the transverse peak average of maximum input acceleration that can be sustained by the structure is lower than that of the vertical peak average. Meanwhile, transverse deformation is more severe than vertical deformation, indicating that vertical seismic resistance capacity is stronger than transverse seismic capacity. The test result shows that the effect of the constraint system consisted of ring beam, constructional column as well as horizontal tie reinforcement is quite obvious, the structure possesses comparatively strong resistance of failure under the influence of moderate and strong earthquakes, which can completely meet the requirement specified in the Seismic Codes, that is, standing erectly when it is subjected to great earthquakes in the area of seismic intensity VII. When the structure is subjected to rare earthquakes, it also possesses considerable seismic resistance capacity.

Study on Application of Mortar Splint in the Reinforced Masonry Structure

2011 ◽  
Vol 250-253 ◽  
pp. 1183-1186
Author(s):  
Zheng Jun Liao ◽  
Chao He Chen
Keyword(s):  
Masonry Structure ◽  
Seismic Capacity ◽  
Reinforcement Scheme ◽  
Reinforced Masonry ◽  
Before And After

The paper probes into the application of masonry strengthening with mortar splint in the reinforced masonry structure. By optimizing the reinforcement scheme, computing and comparing the indexes of the compound seismic capacity of the building before and after it is strengthened, it can be concluded that the method of masonry strengthening with mortar splint can greatly improve the compound seismic capacity of buildings and achieve the goal of building’s strengthening.

Implementing the performance-based seismic design for new reinforced concrete structures: Comparison among ASCE/SEI 41, TBI, and LATBSDC

2021 ◽  
pp. 875529302098196
Author(s):  
Siamak Sattar ◽  
Anne Hulsey ◽  
Garrett Hagen ◽  
Farzad Naeim ◽  
Steven McCabe
Keyword(s):  
Reinforced Concrete ◽  
Los Angeles ◽  
Seismic Design ◽  
Common Ground ◽  
Seismic Analysis ◽  
Tall Buildings ◽  
The United States ◽  
Analysis And Design ◽  
Performance Based Seismic Design ◽  
New Buildings

Performance-based seismic design (PBSD) has been recognized as a framework for designing new buildings in the United States in recent years. Various guidelines and standards have been developed to codify and document the implementation of PBSD, including “ Seismic Evaluation and Retrofit of Existing Buildings” (ASCE 41-17), the Tall Buildings Initiative’s Guidelines for Performance-Based Seismic Design of Tall Buildings (TBI Guidelines), and the Los Angeles Tall Buildings Structural Design Council’s An Alternative Procedure for Seismic Analysis and Design of Tall Buildings Located in the Los Angeles Region (LATBSDC Procedure). The main goal of these documents is to regularize the implementation of PBSD for practicing engineers. These documents were developed independently with experts from varying backgrounds and organizations and consequently have differences in several degrees from basic intent to the details of the implementation. As the main objective of PBSD is to ensure a specified building performance, these documents would be expected to provide similar recommendations for achieving a given performance objective for new buildings. This article provides a detailed comparison among each document’s implementation of PBSD for reinforced concrete buildings, with the goal of highlighting the differences among these documents and identifying provisions in which the designed building may achieve varied performance depending on the chosen standard/guideline. This comparison can help committees developing these documents to be aware of their differences, investigate the sources of their divergence, and bring these documents closer to common ground in future cycles.

Shaking Table Test Analysis of Bottom-Business Multi-Story Masonry Structure in Small and Middle Towns in the Southward

2014 ◽  
Vol 580-583 ◽  
pp. 1463-1466
Author(s):  
Yong Duo Liang ◽  
Xun Guo ◽  
Hua Wei Yi ◽  
Yong Zhen Li ◽  
Jin Zheng Jiang
Keyword(s):  
Shaking Table Test ◽  
Masonry Structure ◽  
Shaking Table ◽  
Earthquake Simulation ◽  
Seismic Capacity ◽  
Test Analysis ◽  
Earthquake Resistant ◽  
Scale Models ◽  
Longitudinal Wall ◽  
Reduced Scale

Bottom-business multi-story masonry structure is widely used in small and middle towns in the southward in China. In the downtown of Beichuan county which affected by Wenchuan earthquake, more than 80% of this kind of building collapsed. But the Apartment of Beichuan Telecommunication Bureau behaved well earthquake resistant capacity with a moderate damage in the earthquake. The obvious difference between this building and others is the setting of winged columns in the front longitudinal wall of the first floor. For proving the influence of these members in the structure seismic capacity, the earthquake simulation shaking table test of 2 1/5 reduced scale models were designed and carried out. The models dynamic response, acceleration, displacement and strain were measured and collected, that model with winged columns behave well was testified. And the reinforcement method of balancing stiffness and increasing ductility is put forward. The results provide a foundation for the retrofitting design of the existing houses.

scholarly journals In-Plane Strengthening Effect of Prefabricated Concrete Walls on Masonry Structures: Shaking Table Test

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Weiwei Li ◽  
Weiqing Liu ◽  
Shuguang Wang ◽  
Dongsheng Du
Keyword(s):  
Shaking Table Test ◽  
Masonry Structure ◽  
Shaking Table ◽  
Strengthening Effect ◽  
Masonry Structures ◽  
Dynamic Tests ◽  
Seismic Capacity ◽  
Concrete Walls ◽  
Improvement Effect ◽  
Scaled Models

The improvement effect of a new strengthening strategy on dynamic action of masonry structure, by installing prefabricated concrete walls on the outer facades, is validated by shaking table test presented in this paper. We carried out dynamic tests of two geometrically identical five-story reduced scaled models, including an unstrengthened and a strengthened masonry model. The experimental analysis encompasses seismic performances such as cracking patterns, failure mechanisms, amplification factors of acceleration, and displacements. The results show that the strengthened masonry structure shows much more excellent seismic capacity when compared with the unstrengthened one.

Comparative nonlinear seismic analysis of an existing RC bridge designed with obsolete codes

2022 ◽  
pp. 136943322210747
Author(s):  
Germán Nanclares ◽  
Daniel Ambrosini ◽  
Oscar Curadelli
Keyword(s):  
Numerical Model ◽  
Seismic Design ◽  
Seismic Analysis ◽  
Nonlinear Dynamic Analysis ◽  
Highway Bridges ◽  
Element Model ◽  
Cyclic Behavior ◽  
Transverse Reinforcement ◽  
3D Finite Element ◽  
Collapse Mechanisms

The evolution of seismic design and calculation criteria for highway bridges has a direct influence on their structural behavior. This paper presents a nonlinear dynamic analysis using a detailed 3D finite element model of an existing bridge, with different design criteria for the column transverse reinforcement, according to code requirements of different times. The numerical model is able to simulate both the collapse of the structure and the generation of damage in its elements when subjected to extreme seismic actions. Through the numerical model, it is possible to represent the cyclic behavior of the concrete, and to evaluate the influence of the transverse reinforcement assigned to the column on the overall response of the bridge. The formation of plastic hinges is verified, as well as the identification of different collapse mechanisms.

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