Dynamic Characteristic Investigation of a Historical Masonry Building and Surrounding Ground in Kathmandu

2011 ◽  
Vol 6 (1) ◽  
pp. 26-35 ◽  
Author(s):  
Hari Ram Parajuli ◽  
◽  
Junji Kiyono ◽  
Masatoshi Tatsumi ◽  
Yoshiyuki Suzuki ◽  
...  
Keyword(s):  
Dynamic Properties ◽  
Mitigation Strategies ◽  
Disaster Mitigation ◽  
World Heritage Site ◽  
Ambient Vibration ◽  
Mitigation Measures ◽  
Masonry Building ◽  
Heritage Site ◽  
Historical Masonry ◽  
Microtremor Measurements

Saving human lives and cultural heritage from natural disasters is a key to earthquake-disaster mitigation strategies. Culturally valued structures built before earthquake codes and regulations emerged are often vulnerable to earthquake loads, but such structures must be comprehensively studied before applying mitigation measures. Microtremor measurements in Patan Durbar Square area, a World Heritage site, were investigated to determine dynamic properties of the soil at four locations and the predominant ground frequency calculated to be 2.07 Hz. Ambient vibration in an old masonry building was measured and vibration frequencies in different modes were detected using the Fourier spectrum, which found that the building has fundamental period in transverse direction. The building’s damping was estimated to be 5.2-6.4%.

scholarly journals Operational Modal Analysis: A Tool for Assessing Changes on Structural Health State of Historical Constructions after Consolidation and Reinforcement Works—Jura Chapel (Jerez de la Frontera, Spain)

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Manuel Romero ◽  
Pablo Pachón ◽  
Víctor Compán ◽  
Margarita Cámara ◽  
Francisco Pinto
Keyword(s):  
Modal Analysis ◽  
Dynamic Properties ◽  
Operational Modal Analysis ◽  
Ambient Vibration ◽  
Mode Shapes ◽  
Health Improvement ◽  
Health State ◽  
Structural Behaviour ◽  
Structural Health ◽  
Historical Masonry

Today’s society is sensitive to the architectural heritage conservation. This implies to perform works to maintain these buildings and to assure their structural security. In the last years, the structural analysis of historical masonry constructions has experienced a great progress, thanks to the use of techniques based on the study of the dynamic properties of building structures. In this context, changes on the structural health state of a building are one of the elements that can be assessed considering changes on their dynamic properties. This is useful to evaluate the effectiveness of structural interventions on this kind of buildings by analysing these properties before and after it. This paper focuses on the Jura Chapel, in Jerez de la Frontera (Spain). This chapel is part of San Juan de los Caballeros Church and is dated from the 15th century. In 2015 and after the identification of some structural damages in the chapel vault, an intervention was initiated to improve its structural behaviour and to recover its original appearance. The present work reports the evaluation of the effects that this intervention has on the structural health state of the building, using nondestructive techniques based on ambient vibration tests (AVT) and Operational Modal Analysis (OMA). The AVT were performed for both prerestored and restored states and under environmental loads. A discussion about the validity of doing AVT from extrados when a vault presents disconnection between ribs and web is included in the paper. As a result, the first five natural frequency values have increased while the corresponding mode shapes have not changed significantly. This proves a structural health improvement caused by the repairing process without changing the original behaviour of the structure. This work shows OMA capabilities for evaluating the effectiveness of intervention works on the health state of a historical masonry structure.

scholarly journals Flood Analysis and Mitigation Strategies in Algeria

2021 ◽  
pp. 95-118
Author(s):  
Hamouda Boutaghane ◽  
Tayeb Boulmaiz ◽  
El Khansa Lameche ◽  
Abdelouahab Lefkir ◽  
Mahmoud Hasbaia ◽  
...  
Keyword(s):  
Flash Flood ◽  
Warning System ◽  
Monitoring Network ◽  
Flash Floods ◽  
Mitigation Strategies ◽  
World Heritage Site ◽  
Scientific Publications ◽  
The Past ◽  
Heritage Site ◽  
Unesco World Heritage Site

AbstractFloods are frequent hazard in Algeria. They cause severe casualties, destroy infrastructures, and impair economies. In the past decades, Algeria experienced devastating floods. The dominant type of occurring floods are flash floods, which tend to be not well documented and studied in Algeria. This chapter presents a brief introduction to the flood phenomena within the Algerian climatic and management context, based on databases, scientific publications, and local technical reports. Existing studies about floods are reviewed. It also provides an analysis of the most disastrous floods that occurred in the past decades. Of the most noteworthy flash floods, a highlight of the Bab El Oued flash flood occurring in a heavily urbanized setting and the M’zab Valley flash flood, which took place in a UNESCO World Heritage Site. The monitoring network in Algeria is presented and data availability is discussed. The implementation of the first forecasting and early warning system are also presented. Different aspects of flash floods were presented including the effect of the increase of urbanization, the influence of climate change and the adopted strategies of flood risk management. Heavy and increasing urbanization and population growth increased the flood vulnerability and this trend must be mitigated.

scholarly journals ADVANCEDMONITORING SYSTEMS FOR LANDSLIDE RISK REDUCTION IN THE'SIQ' OF PETRA (JORDAN)

2017 ◽  
Vol XLII-2/W5 ◽  
pp. 163-169 ◽  
Author(s):  
G. Delmonaco ◽  
M. Brini ◽  
G. Cesaro
Keyword(s):  
Monitoring System ◽  
Fragile Site ◽  
World Heritage ◽  
World Heritage Site ◽  
Mitigation Measures ◽  
Landslide Risk ◽  
Integrated Monitoring ◽  
Heritage Site ◽  
Unesco World Heritage Site ◽  
The Stability

The UNESCO World Heritage Site of Petra is characterized by a spectacular geo-archaeological landscape that lead to its inscription as World Heritage Site in 1985. Petra is also a fragile site facing a wide diversity of risks, ranging from those posed by environmental factors as well as those attributed to tourism. In recent years, hazardous natural phenomena were registered as increasingly impacting the site, and most specifically the 'Siq', a 1.2 km naturally formed gorge serving as the only tourist entrance to the archaeological park, posing a major threat to cultural heritage and visitors. These recent events have prompted UNESCO Amman Office, in cooperation with the national authorities, to develop a strategy towards prevention and mitigation of instability phenomena at the 'Siq' and, thus, further contribute to the management and conservation of the site through the implementation of the multi-year Italian funded "Siq Stability" project Actions have been primarily focusing on the analysis of the stability conditions of the 'Siq' slopes, the installation of an integrated monitoring system and the definition and implementation of mitigation measures against rock instability. This paper reports a detailed description of the integrated monitoring system installed paying particular attention on the wireless monitoring devices and the EASA applications, which proved to be some of the most successful systems implemented in the framework of the project. Some preliminary results regarding the data retrieved, policies applied and actions taken to ensure long-term sustainability and capacity development of the national authorities are also reported.

scholarly journals LONG-TERM DYNAMIC MONITORING OF THE HISTORICAL MASONRY FAÇADE: THE CASE OF PALAZZO DUCALE IN VENICE, ITALY

2017 ◽  
Vol IV-2/W2 ◽  
pp. 187-193 ◽  
Author(s):  
J. Noh ◽  
S. Russo
Keyword(s):  
Dynamic Properties ◽  
Masonry Wall ◽  
Dynamic Responses ◽  
Ambient Vibration ◽  
Dynamic Monitoring ◽  
Dynamic Identification ◽  
Data Set ◽  
Vibration Signature ◽  
Historical Masonry

Long-term dynamic monitoring of the masonry façade of Palazzo Ducale known as Doge’s palace in Venice, Italy was performed from September 2010 to October 2012. This article demonstrates the results of preliminary analysis on the data set of the first 12-month long monitoring campaign for out-of-plumb dynamic responses of the medieval façade of the monument. The aim of the analysis of the dynamic signals is to validate the data set and investigate dynamic characteristics of the vibration signature of the historical masonry wall in the long-term. <i>Palazzo Ducale</i> is a heavily visited heritage due to its high cultural importance and architectural value. Nevertheless, little is known about the dynamic behaviour of the double-leaf masonry façade. In this study, the dynamic properties of the structure are presented by dynamic identification carried out with the effect of the ambient vibration measured at four different locations on the façade and portico level. The trend and intensity of the vibration at each measurement locations are identified over the year. In addition, the issue on eliminating the noise blended in the signals for reliable analysis are also discussed.

Preservation of Historical Masonry Building by House Moving

2017 ◽  
Vol 55 (8) ◽  
pp. 668-673
Author(s):  
T. Kitamura ◽  
K. Tohkai ◽  
F. Kawagishi ◽  
M. Onishi
Keyword(s):  
Masonry Building ◽  
Historical Masonry

The Role of New Media in Facilitating Entrepreneurship in Tourism - Case Study: Promoting Komodo Island in East Nusa Tenggara

2010 ◽  
Vol 2 (2) ◽  
pp. 63-72
Author(s):  
Dessy Kania
Keyword(s):  
New Media ◽  
Tourism Industry ◽  
World Heritage Site ◽  
Foreign Visitor ◽  
Printed Media ◽  
Heritage Site ◽  
High Inflation ◽  
Tourism Destinations

Tourism is an important component of the Indonesian economy as well as a significant source of the country’s foreign exchange revenues. According to the Center of Data and Information - Ministry of Culture and Tourism, the growth of foreign visitor arrivals to Indonesia has increased rapidly by 9.61 percent since 2010 to the present. One of the most potential tourism destinations is Komodo Island located in East Nusa Tenggara. With the island’s unique qualities, which include the habitat of the Komodo dragons and beautiful and exotic marine life, it is likely to be one of the promising tourism destinations in Indonesia and in the world. In 1986, the island has been declared as a World Heritage Site by UNESCO. The Ministry of Culture and Tourism continuously promotes many of the country’s natural potential in tourism through various media: printed media, television and especially new media. However, there are challenges for the Indonesian tourism industry in facilitating entrepreneurship skills among the local people in East Nusa Tenggara. According to the Central Bureau of Statistics (2011), East Nusa Tenggara is considered as one of the poorest provinces in Indonesia where the economy is lower than the average, with a high inflation of 15%, and unemployment of 30%. This research is needed to explore further the phenomenon behind the above facts, aiming at examining the role of new media in facilitating entrepreneurship in the tourism industry in Komodo Island. The results of this study are expected to provide insights that can help local tourism in East Nusa Tenggara. Keywords: Tourism, Entrepreneurship, New Media

INHERITING THE CITY: HISTORIC URBAN LANDSCAPE OF GEORGE TOWN UNESCO WORLD HERITAGE SITE

2018 ◽  
Vol 16 (5) ◽  
Author(s):  
Rohayah Che Amat
Keyword(s):  
Local Community ◽  
Urban Landscape ◽  
World Heritage ◽  
World Heritage Site ◽  
Unesco World Heritage ◽  
Landscape Values ◽  
Heritage Site ◽  
Unesco World Heritage Site ◽  
Community Evaluation ◽  
George Town

This research presents the value of historic urban landscape (HUL) elements in influencing the character of George Town UNESCO World Heritage Site (WHS), Penang, Malaysia. The values were perceived by the local community of different social-cultural groups that occupied the study area. The historic urban landscape elements constitute towards the protection of its townscape. The identification of the heritage elements influenced by the community interaction with their environment. This study also helps to define the character of a place, as well as reflecting its historical significance. The study adopted four techniques to gather both qualitative and quantitative data, including questionnaire survey, in-depth interview, visual survey and content analysis. In general, the local community has the capability in valuing the historic urban landscape values. The outcomes of their perceptions became the statement of the historic urban landscape values, which are expected to lead to the development of the areas. The community evaluation and perception can be expanded in implementing any development of the historic urban area by the authority.

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