scholarly journals Seismic capacity evaluation of unreinforced masonry residential buildings in Albania

2012 ◽  
Vol 12 (12) ◽  
pp. 3753-3764 ◽  
Author(s):  
H. Bilgin ◽  
O. Korini
Keyword(s):  
Residential Buildings ◽  
Unreinforced Masonry ◽  
Performance Criteria ◽  
Medium Size ◽  
Nonlinear Behaviour ◽  
Seismic Capacity ◽  
Capacity Curves ◽  
Capacity Evaluation ◽  
Site Survey ◽  
Principal Directions

Abstract. This study evaluates seismic capacity of the unreinforced masonry buildings with the selected template designs constructed per pre-modern code in Albania considering nonlinear behaviour of masonry. Three residential buildings with template designs were selected to represent an important percentage of residential buildings in medium-size cities located in seismic regions of Albania. Selection of template designed buildings and material properties were based on archive and site survey in several cities of Albania. Capacity curves of investigated buildings were determined by pushover analyses conducted in two principal directions. The seismic performances of these buildings have been determined for various earthquake levels. Seismic capacity evaluation was carried out in accordance with FEMA (Federal Emergency Management Agency) 440 guidelines. Reasons for building damages in past earthquakes are examined using the results of capacity assessment of investigated buildings. It is concluded that of the residential buildings with the template design, with the exception of one, are far from satisfying required performance criteria. Furthermore, deficiencies and possible solutions to improve the capacity of investigated buildings are discussed.

SEISMIC CAPACITY OF MEDIUM SIZE CONTINUOUS BRIDGES WITH LEAD-RUBBER BEARINGS

2019 ◽  
Vol 3 (Special Issue on First SACEE'19) ◽  
pp. 199-206
Author(s):  
Bertha Olmos ◽  
José Jara ◽  
José Luis Fabián
Keyword(s):  
Seismic Performance ◽  
Seismic Vulnerability ◽  
Base Isolation ◽  
Elastic Behaviour ◽  
Medium Size ◽  
Nonlinear Behaviour ◽  
Seismic Capacity ◽  
Damage Scenarios ◽  
Isolation Systems ◽  
Rubber Bearings

This paper investigates the effects of the nonlinear behaviour of isolation pads on the seismic capacity of bridges to identify the parameters of base isolation systems that can be used to improve seismic performance of bridges. A parametric study was conducted by designing a set of bridges for three different soil types and varying the number of spans, span lengths, and pier heights. The seismic responses (acceleration, displacement and pier seismic forces) were evaluated for two structural models. The first model corresponded to the bridges supported on elastomeric bearings with linear elastic behaviour and the second model simulated a base isolated bridge that accounts for the nonlinear behaviour of the system. The seismic demand was represented with a group of twelve real accelerograms recorded on the subduction zone on the Pacific Coast of Mexico. The nonlinear responses under different damage scenarios for the bridges included in the presented study were estimated. These results allow determining the seismic capacity of the bridges with and without base isolation. Results show clearly the importance of considering the nonlinear behaviour on the seismic performance of bridges and the influence of base isolation on the seismic vulnerability of medium size bridges.

scholarly journals Integrated Seismic and Energy Retrofit Interventions on a URM Masonry Building: The Case Study of the Former Courthouse in Fabriano

2021 ◽  
Vol 13 (17) ◽  
pp. 9592
Author(s):  
Amedeo Caprino ◽  
Filippo Lorenzoni ◽  
Laura Carnieletto ◽  
Leonardo Feletto ◽  
Michele De Carli ◽  
...  
Keyword(s):  
Seismic Vulnerability ◽  
Central Italy ◽  
Unreinforced Masonry ◽  
Performance Criteria ◽  
Masonry Building ◽  
Seismic Capacity ◽  
Building Stock ◽  
Energy Retrofit ◽  
Regulatory Frameworks

Following the 2016 central Italy earthquakes, the high seismic vulnerability of existing buildings is once again at the center of the debate. Indeed, the majority of the Italian building stock (around 60%) was built before adopting the first seismic provisions (1974) and in a territory entirely characterized by medium to high levels of seismic hazard. On the other hand, the first provisions addressing thermal performance criteria were introduced in 1976 but with limited impact. A consistent reduction in energy consumption was further achieved in 1991, when even more buildings were erected. As a consequence, the Italian building stock is characterized by reduced seismic capacity and poor energy efficiency and, to optimize the available resources, combined retrofit interventions approaches are required. In this context, a synergic strategy for the seismic and energy retrofit of a unreinforced masonry (URM) building was proposed. The former Courthouse in Fabriano (Ancona, Marche), a strategic, three-story, unreinforced masonry building in the network of permanent monitoring systems of the Italian Department of Civil Protection, was selected as a case study. The overall effectiveness of various solutions of combined structural refurbishment and energy retrofit interventions, having different levels of invasiveness on the building, was assessed. In addition, a common methodology based on the expected annual losses allowed evaluating the financial feasibility of the proposed integrated interventions and estimating the changes in the return of the retrofitting investment in various seismic and climate zones. The results also show how the payback period could be significantly reduced by incentives and regulatory frameworks that currently favour the execution of integrated interventions.

Structural performance of URM school buildings during the 2019 Albania earthquakes

2020 ◽  
Vol 6 (4) ◽  
pp. 215
Author(s):  
Marjo Hysenlliu ◽  
Huseyin Bilgin ◽  
Altin Bidaj ◽  
Marsed Leti
Keyword(s):  
Building Blocks ◽  
Detailed Examination ◽  
Performance Criteria ◽  
Analytical Models ◽  
School Buildings ◽  
Seismic Capacity ◽  
Damage Level ◽  
Capacity Curves ◽  
Performance Point ◽  
Geotechnical Investigations

This paper aims to study the seismic performance of school buildings, which have been built in accordance with template unreinforced masonry [URM] school projects in Albania. For this purpose, the most widely used two template designs which were damaged during the 2019 Durrës (Albania) Earthquakes, have been selected. Analytical models of each school were prepared following the experimental data on the quality of the masonry constitutive components of the selected school buildings. Geotechnical investigations were deployed to obtain the soil characteristics of the area where the schools’ foundation are located. Nonlinear static analyses have been performed to obtain the seismic capacity, the performance point and the damage level states. The performance-based method has been used to that purpose. The detailed examination of capacity curves and performance evaluation identified deficiencies and weak parts of the school building blocks. Results have shown that existing school buildings constructed pre-modern codes are far from satisfying the required performance criteria, suggesting that urgent response and necessary measure should be put into action.

Numerical model for the in-plane seismic capacity evaluation of tall plasterboard internal partitions

2018 ◽  
Vol 122 ◽  
pp. 572-584 ◽  
Author(s):  
Crescenzo Petrone ◽  
Orsola Coppola ◽  
Gennaro Magliulo ◽  
Pauline Lopez ◽  
Gaetano Manfredi
Keyword(s):  
Numerical Model ◽  
Seismic Capacity ◽  
Capacity Evaluation

Mechanical Analysis for the Assessment of the Seismic Capacity of Masonry Buildings’ Classes in the City Centre of Sulmona (Italy)

2010 ◽  
Vol 133-134 ◽  
pp. 623-628
Author(s):  
Marco Munari ◽  
Gianluca Busolo ◽  
Maria Rosa Valluzzi
Keyword(s):  
Mechanical Analysis ◽  
City Centre ◽  
Masonry Buildings ◽  
Seismic Capacity ◽  
Limit States ◽  
Damage Level ◽  
Capacity Curves ◽  
Perfectly Plastic ◽  
Displacement Capacity ◽  
Comparison Of The Results

A mechanical based method for the evaluation of the seismic capacity of masonry buildings’ classes in terms of damage limit states is presented: the purpose of the study is to achieve, in the framework of vulnerability analyses at territorial scale, reliable values for the damage level of vulnerability classes of masonry buildings, depending on the seismic input level. This approach is, in fact, designed as a “1st level” tool based on easily traceable information provided by expeditious surveys. Once identified a limited number of typological, physical and mechanical parameters that are necessary to define each vulnerability class, a significant number of simplified models of masonry buildings belonging to each class has been created. Non-linear static analysis of these models allowed the creation of bilinear elastic perfectly plastic capacity curves: the displacement capacity described by these curves is related with the actual displacement values required by seismic intensities associated to different return periods. It is so possible to identify, for different vulnerability classes and different seismic inputs, the loss of capacity in terms of damage level of each building. An application of the method to models representative of masonry buildings in the historical centre of Sulmona, in L’Aquila province, and a comparison of the results with others obtained with other methodologies of assessment are presented.

scholarly journals Reliability Verification of Unreinforced Masonry Wall

2016 ◽  
Vol 10 (6) ◽  
pp. 159
Author(s):  
Mahdi Montazerolghaem ◽  
Wolfram Jäger
Keyword(s):  
Reliability Analysis ◽  
Building Materials ◽  
Residential Buildings ◽  
Limit State ◽  
Shear Walls ◽  
Unreinforced Masonry ◽  
Major Influence ◽  
Reliability Level ◽  
Verification Methods ◽  
Reliability Verification

Unreinforced masonry (URM) is known as sustainable building material and is on the top of worldwide building materials consumed in residential buildings. The reliability level of a designed URM shear walls (URMW) has major influence on safety and cost of masonry constructions. Assessing the reliability level of different URMW is the purpose of this paper.The verification methods for combination of in-plane shear and compression according to the latest version of German National Annex of Eurocode 6are presented. The design models available in the code are rephrased and direct deterministic equations are introduced to predict the capacity. Limit State and Reliability Verification of URM Wall.On this base, several limit state are established and reliability analysis using crude Monte Carlo method are run. The effect of uncertainty on assessed reliability is highlighted. The distinction between linear and non-linear application of partial safety factors are assessed. The result of reliability analysis, based on the available probabilistic information on material with uncertainty models for designed URMW is presented in the article.The principal results are the actual reliability level found in the study regarding various masonry walls designed according to the latest German National Annex code DIN EN 1996-1-1 /NA: 2012-05 on different load situation. A review on the common target reliability index for structures according to different codes is done and the assessed reliability is compared with the target value.

scholarly journals RESEARCH OF THE SETTLEMENT OF PRAGUE-KORCHAK CULTURE IN RIVNE CITY

2021 ◽  
Vol 40 (3) ◽  
pp. 122-130
Author(s):  
O. P. Voitiuk ◽  
B. A. Pryshchepa
Keyword(s):  
Middle Ages ◽  
Main Type ◽  
Residential Buildings ◽  
Medium Size ◽  
Detection Level ◽  
Foundation Pit ◽  
Wooden Frame ◽  
The Earth ◽  
And Storage ◽  
Clay Pots

The paper introduces into scientific circulation the results of research of the objects of Early Slavs of the Prague-Korchak culture in a multi-layered settlement in the southern part of Rivne city. The settlement is located on the eastern shore of the Basiv Kut Reservoir, on the oval hill measuring 220 Ч 120 m. The first finds of the Early Middle Ages were discovered here by V. K. Piasetskyi in 1989. In 2019, the excavations were carried out on the area of 590 m2; the housing and storage pit of the Prague-Korchak culture have been discovered. The quadrangular foundation pit of 3.5 Ч 3.5 m square was sunk into the earth to the 0.3—0.4 m from detection level. The remains of stone stove made on the wooden frame were located in the northern corner of the dwelling. Such semi-dugout dwellings with the stove in one of corners was the main type of residential buildings in the population of the Prague-Korchak culture. The pillar holes found in the corners of the foundation pit and in the middle of the walls indicate the frame-pillar construction of the wooden walls. Among the stones from the destroyed stove and on the earthen floor in the central part of the foundation pit of the dwelling the remains of nine clay pots were found. We managed to reconstruct the full profiles of seven of them; two else vessels are represented by the profiles of the upper parts. The pots from the dwelling have a conical body, weakly marked shoulder, scarcely marked neck and short rim. The surface of the item is insufficiently smoothed and bumpy. The admixtures in the clay are mostly of small and medium size, with added fireclay, grus and sand. By their size the vessels are divided into small (1), medium (5) and large (3). All pots from the dwelling belong to variants 1—3 of the first type according to I. P. Rusanova’s classification. This combination is typical of the early monuments of the Prague-Korchak culture. The analysis allows attributing the ceramic complex from Rivne to phaze 1 according to I. O. Havritukhin and to date it as belonging to the second half of 5th — mid-6th centuries. The settlement was not large; two or three farmsteads could simultaneously exist there. They were located at a distance of 100—150 m from each other.

scholarly journals Improving the Sustainability of Traditional Dwellings in Yunnan, China: Seismic Resistance Testing of Wood-frame and Earth-Built Wall Dwellings

2019 ◽  
Vol 11 (4) ◽  
pp. 977 ◽  
Author(s):  
Yu Bai ◽  
Jing Gao ◽  
Adrian Pitts ◽  
Yun Gao ◽  
Wenfeng Bai ◽  
...  
Keyword(s):  
Residential Buildings ◽  
Residential Building ◽  
Shaking Table ◽  
Resistance Testing ◽  
Construction Technology ◽  
Seismic Capacity ◽  
Future Design ◽  
Earthquakes In China ◽  
Building Components ◽  
Wood Frame

The Southwest provinces of China are locations with a rich variety of different dwelling design typologies based on traditional cultures and ethnic groups. In this area, the Province of Yunnan has many such dwelling types, and it is also an area with most frequent earthquakes in China. The seismic problems of housing structure must therefore be solved as part of the study on sustainable development of villages to provide relevant advice for future design options. This paper reports research, which evolved over a ten-year period that deals with the seismic capacity of residential buildings. Simulations using shaking table tests were carried out to assess the performance of traditional residential structures as well with the impacts of material modifications and the structural strengthening of common residential building components found in Yunnan. Relevant and pertinent construction technology solutions that could enhance the seismic capacity of residential buildings and act as innovative improvements for the sustainability of rural dwellings are suggested.

Sign in / Sign up

Export Citation Format

Share Document