scholarly journals Seismic Capacity Assessment of Unreinforced Brick Masonry Building Performed According To Eurocode

2020 ◽  
Vol 2 (1) ◽  
pp. 121-125
Author(s):  
Raul Gautam ◽  
Kshitiz Paudel
Keyword(s):  
Degrees Of Freedom ◽  
Linear Method ◽  
Brick Masonry ◽  
Masonry Building ◽  
Masonry Structures ◽  
Construction Technology ◽  
Seismic Capacity ◽  
Nonlinear Method ◽  
Modeling And Analysis ◽  
Equivalent Frame

 Brick Masonry Building with cement sand mortar is a common type of building typology in Nepal. Regardless of being one of the eldest construction technology, the behavior of masonry building is still a matter of study. The uncertainty in the behavior of masonry structures is due to material heterogeneity, complex behavior under different loading conditions and may be due to less research in this arena. Different modeling strategies are used and proposed worldwide to design and to identify the seismic performance of Masonry Building. The analysis strategy ranges from the simple linear method, equivalent frame method, static nonlinear method to dynamic nonlinear, which may be chosen according to engineering design aims and research purpose. In this attempt, authors choose two degrees of freedom 3D model of Unreinforced Brick Masonry Structures which catches both overturning and hysteresis mechanisms due to the shear response implemented by the TREMURI program with static nonlinear procedures. This verified method of modeling and analysis is applied to assess the performance of three different Unreinforced Brick Masonry buildings of the same plans with different numbers of storey.

scholarly journals Seismic Capacity Assessment of Confined Brick Masonry Building: An Experimental Approach

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Asfandyar Ahmed ◽  
Imad Ahmad ◽  
Khan Shahzada ◽  
Muhammad Tayyab Naqash ◽  
Bashir Alam ◽  
...  
Keyword(s):  
Concrete Block ◽  
Brick Masonry ◽  
Hysteresis Curve ◽  
Masonry Building ◽  
Seismic Capacity ◽  
Kashmir Earthquake ◽  
Before And After ◽  
Loading System ◽  
Room Model ◽  
Comparison Of The Results

Brick masonry is widely used for building construction throughout the world. However, unreinforced brick masonry buildings performed poorly in the 2005 Kashmir earthquake, in Pakistan, resulting in a decline in the use of brick masonry. In order to investigate and quantify the performance of brick masonry against the seismic forces by confining it through typical stiffer, line elements (column and beams), a full-scaled room model of an area 3048 × 3658 mm (10 × 12 ft) and height of 3353 mm (11 ft) was constructed using confined brick masonry. The model was tested under quasistatic loading system. Crack pattern was noted at the end of each loading cycle. The response of the model was interpreted through a hysteresis curve, which was then idealized by a bilinear curve. A comparison of the results has been made with four different studies done on the similar model made of unreinforced brick masonry before and after retrofitting and unreinforced concrete block masonry before and after retrofitting previously tested at the same testing facility.

scholarly journals Survey of Eight Modern Methods of Hamiltonian Mechanics

Axioms ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 293
Author(s):  
Alexander D. Bruno ◽  
Alexander B. Batkhin
Keyword(s):  
Hamiltonian System ◽  
Periodic Solutions ◽  
Degrees Of Freedom ◽  
Linear Method ◽  
Hamiltonian Mechanics ◽  
Nonlinear Method ◽  
New Methods ◽  
Small Parameters ◽  
The Stability ◽  
Analytic Computation

Here we describe eight new methods, arisen in the last 60 years, to study solutions of a Hamiltonian system with n degrees of freedom. The first six of them are intended for systems with small parameters or without them. The methods allow to find families of periodic solutions and families of invariant n-dimensional tori by means of analytic computation near a stationary solution, near a periodic solution and near an invariant torus, using the corresponding normal form of a Hamiltonian. Then we can continue the founded families by means of numerical computation. In a Hamiltonian system without parameters, only periodic solutions and invariant n-dimensional tori form one-parameter families. The last two methods are intended for systems with not small parameters, which do not depend on time. They allow computing sets of parameters, which guarantee the stability of some solutions for linear (method seven) and nonlinear (method eight) systems. We do not consider chaotic behaviors, but only regular ones.

In Situ Lateral Load Testing of a Two-Story Solid Clay Brick Masonry Building

2018 ◽  
Vol 32 (5) ◽  
pp. 04018058 ◽  
Author(s):  
Alper Aldemir ◽  
Baris Binici ◽  
Erdem Canbay ◽  
Ahmet Yakut
Keyword(s):  
Lateral Load ◽  
Brick Masonry ◽  
Masonry Building ◽  
Load Testing ◽  
Clay Brick

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.

scholarly journals Cyclic behavior of the R/C frames with reinforced masonry infills

2020 ◽  
Vol 156 ◽  
pp. 05014
Author(s):  
Jafril Tanjung ◽  
Maidiawati
Keyword(s):  
Lateral Displacement ◽  
Brick Masonry ◽  
Frame Structure ◽  
Cyclic Behavior ◽  
Cyclic Loads ◽  
Seismic Capacity ◽  
Masonry Infill ◽  
Masonry Infills ◽  
Experimental Works ◽  
Reversed Cyclic

This study focuses on the experimental works to define the behavior of the reinforced concrete (R/C) frame model with the strengthening of the brick masonry infill by using the embedded reinforcement bars subjected to lateral reversed cyclic loads. A previous study by applying the lateral monotonic static loads showed that the embedded reinforcement bars increased the lateral capacity of the R/C frame and also delayed the failure of the brick masonry infill and R/C frame structure as well. However, in order to define its seismic capacity, a lateral reversed cyclic loading is required. The experimental works in this study were conducted by preparing and testing the 1/4 scaled-down R/C frame specimens represented the first story of the middle multi-story commonly constructed in the earthquake-prone area such as West Sumatera, Indonesia. The R/C frame specimens were two R/C frames with brick masonry infills where one of them strengthened by the embedded reinforced bars. All specimens were tested for applying the lateral reversed cyclic loads. The applied lateral load, the lateral displacement, the progressive cracks, and the failure mode of the specimens were observed and recorded during experimental works. As it was expected, the presence of the embedded reinforced bars in the brick masonry infills increases the seismic capacity and stiffness of the R/C specimens and also delayed the failure of the specimens. The experimental results in this study imply the simple strengthening method for the brick masonry infills.

Seismic Vulnerability Assessment of Masonry Building from Ottoman Period in Bosnia and Herzegovina

2015 ◽  
pp. 734-764
Author(s):  
Mustafa Hrasnica ◽  
Amir Čaušević ◽  
Nerman Rustempašić
Keyword(s):  
Bosnia And Herzegovina ◽  
Seismic Vulnerability ◽  
Stone Masonry ◽  
Masonry Building ◽  
Masonry Structures ◽  
Historical Buildings ◽  
Traditional Art ◽  
South East Europe ◽  
Structural Engineers ◽  
Scale Design

Traditional art of building in Bosnia and Herzegovina comprises brick or stone masonry structures. Most historical buildings belonging to national cultural heritage were made of stone-masonry. The country is situated in seismic active region of South-East Europe. In the case of strong earthquake motion such buildings could suffer heavy damages. Some structural elements of historical buildings, as domes and arches, cracked already by moderate earthquake but without the loss of stability. Substantial damages were caused by recent war disaster. Damages could be accumulated through the history as well. Generally, stone-masonry buildings in Bosnia and Herzegovina can be classified in vulnerability classes between A and C according to European Macroseismic Scale. Design and construction procedures for rehabilitation are presented here with examples of repair and strengthening of mosques, which present historical stone masonry structures dating from the Ottoman period in Bosnia and Herzegovina. Traditional and contemporary materials were used for their rehabilitation. It is important to preserve original forms, especially those of damaged elements. The challenge for structural engineers and architects was to find equilibrium between aesthetical and structural demands.

Seismic Vulnerability Assessment of Masonry Building from Ottoman Period in Bosnia and Herzegovina

2019 ◽  
pp. 1142-1173
Author(s):  
Mustafa Hrasnica ◽  
Amir Čaušević ◽  
Nerman Rustempašić
Keyword(s):  
Bosnia And Herzegovina ◽  
Seismic Vulnerability ◽  
Stone Masonry ◽  
Masonry Building ◽  
Masonry Structures ◽  
Historical Buildings ◽  
Traditional Art ◽  
South East Europe ◽  
Structural Engineers ◽  
Scale Design

Traditional art of building in Bosnia and Herzegovina comprises brick or stone masonry structures. Most historical buildings belonging to national cultural heritage were made of stone-masonry. The country is situated in seismic active region of South-East Europe. In the case of strong earthquake motion such buildings could suffer heavy damages. Some structural elements of historical buildings, as domes and arches, cracked already by moderate earthquake but without the loss of stability. Substantial damages were caused by recent war disaster. Damages could be accumulated through the history as well. Generally, stone-masonry buildings in Bosnia and Herzegovina can be classified in vulnerability classes between A and C according to European Macroseismic Scale. Design and construction procedures for rehabilitation are presented here with examples of repair and strengthening of mosques, which present historical stone masonry structures dating from the Ottoman period in Bosnia and Herzegovina. Traditional and contemporary materials were used for their rehabilitation. It is important to preserve original forms, especially those of damaged elements. The challenge for structural engineers and architects was to find equilibrium between aesthetical and structural demands.

Seismic Assessment of Masonry Building Clusters with a Dedicated NLA Software

2016 ◽  
Vol 847 ◽  
pp. 191-203 ◽  
Author(s):  
Marco Vailati ◽  
Giorgio Monti ◽  
Giorgia di Gangi
Keyword(s):  
Stochastic Approach ◽  
Seismic Assessment ◽  
Masonry Building ◽  
Structural Units ◽  
Global Response ◽  
Computational Tools ◽  
Modeling And Analysis ◽  
Future Version ◽  
Level Of Knowledge ◽  
Typical Scenario

A building context as complex as that of many historical centers in Europe is the typical scenario where more and more technicians found themselves at work. In addition to the usual difficulty of dealing with the complexity of masonry building clusters, they particularly feel the lack of the essential support of dedicated computational tools. In fact, the calculation codes currently available do not address modeling and analysis of building clusters in a personalized manner. VENUS, Italian acronym for Nonlinear Assessment of Structural Units, is a software developed in C++, which deals with the seismic assessment of building clusters in an integrated manner, accompanying the practitioner from the early stages of defining the level of knowledge, to the management of the design quantities, until the graphic elaboration of the results. Finally, it allows to test the effectiveness of a local intervention with traditional and innovative strengthening techniques and to evaluate its effects on the global response. Finally, a brief description of a stochastic approach foreseen in a future version of the software is discussed.

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