scholarly journals Seismic Retrofit of Defective RC Beam-Column Joints

2018 ◽  
Author(s):  
Amir H Akhaveissy ◽  
Ali Permanoon ◽  
Moein Mirzaei
Keyword(s):  
Concrete Beam ◽  
Seismic Vulnerability ◽  
Tensile Tests ◽  
Rc Beam ◽  
Actual Behavior ◽  
Strong Earthquakes ◽  
Rc Frames ◽  
Set Up ◽  
Core Extraction ◽  
The City

Strong earthquakes always occur in countries with seismic risk and can potentially cause multiple deaths. This study investigates the seismic vulnerability of RC beam-column connections. Generally, it is impractical to simultaneously set up the molds of the concrete beam, ceiling and column and achieve a uniform concrete and this can cause numerous constructional deficiencies. Usually, these deficiencies can be instrumental in the failure of RC frames. Therefore, this study investigates the performance of a defective RC beam-column connection and provides a method to improve the behavior of the connection. The defective connection studied herein belongs to a high school in the city of Kermanshah, Iran. Many factors that affect the performance of the retrofitting designs are studied. Also, all of the parameters used in the analyses were obtained based upon the actual behavior of the material through core extraction and tensile tests. Finally, an optimal design is proposed.

Marital Disharmony among Working Couples in Metropolitan Life: an In-depth Study in Kolkata City

2019 ◽  
Vol 8 (8) ◽  
pp. 72-85
Author(s):  
Nilanjana Ghoshal ◽  
Mst Tania Parveen ◽  
Dr Asraful Alam
Keyword(s):  
Functional Method ◽  
Modern Times ◽  
Metropolitan Cities ◽  
Urban India ◽  
Depth Study ◽  
Working Couples ◽  
Set Up ◽  
Time Required ◽  
The City ◽  
Opposite Gender

In India, traditionally and from time immemorial, marriage has always been a sacred bond for people of this country. The aim of this study is to explain a socially sanctioned sex relationship involving people of two opposite gender whose relationship is expected to endure beyond time required for gestation. The functional method of the study has been set up on the field-based observation to find out the reasons behind rising of marital disharmony among working couples. But the problem is initially in modern times the concept of marriage is gradually taking a different turn between couples. Hence the focus of this paper is to study the various factors giving rise to marital disharmonies among working couples in urban India and how these discords can be solved so that couples can lead a happy harmonious married life ahead. Survey has been done in the city of Kolkata taking people from various walks of life. As Kolkata is one of the major Metropolitan cities of India it was easier to find people belonging to different professions. The result of this study is every marriage brings challenges in life. Maximum working couples are losing attachment with each other as they have lack of time for each other. Bringing work at home, sharing of parenthood, indifference towards each other, lack of adjustments are the causes for which level of disharmony is increasing.

Majolica in the Early Colonial Andes: The Role of Panamanian Wares

2001 ◽  
Vol 12 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Ross W. Jamieson
Keyword(s):  
Spanish Colonial ◽  
Important Indicator ◽  
The Andes ◽  
Early Colonial ◽  
The Pacific ◽  
Elite Status ◽  
Set Up ◽  
The City ◽  
Made In

As one of the most common artifact categories found on Spanish colonial sites, the wheel-made, tin-glazed pottery known as majolica is an important chronological and social indicator for archaeologists. Initially imported from Europe, several manufacturing centers for majolica were set up in the New World by the late sixteenth century. The study of colonial majolica in the Viceroyalty of Peru, which encompassed much of South America, has received less attention than ceramic production and trade in the colonial Caribbean and Mesoamerica. Prior to 1650 the Viceroyalty of Peru was supplied with majolica largely produced in the city of Panama Vieja, on the Pacific. Panama Vieja majolica has been recovered from throughout the Andes, as far south as Argentina. Majolica made in Panama Vieja provides an important chronological indicator of early colonial archaeological contexts in the region. The reproduction of Iberian-style majolica for use on elite tables was symbolically important to the imposition of Spanish rule, and thus Panamanian majolicas also provide an important indicator of elite status on Andean colonial sites.

scholarly journals Puritan Lecturers and Anglican Clergymen during the Early Years of the English Civil Wars

Religions ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Youngkwon Chung
Keyword(s):  
Civil Wars ◽  
Early Phase ◽  
Early Years ◽  
British Isles ◽  
Political Climate ◽  
Set Up ◽  
Base Of Support ◽  
The City ◽  
Urgent Necessity

During the early years of the Civil Wars in England, from February 1642 to July 1643, Puritan parishioners in conjunction with the parliament in London set up approximately 150 divines as weekly preachers, or lecturers, in the city and the provinces. This was an exceptional activity surrounding lectureships including the high number of lecturer appointments made over the relatively brief space of time, especially considering the urgent necessity of making preparations for the looming war and fighting it as well. By examining a range of sources, this article seeks to demonstrate that the Puritan MPs and peers, in cooperation with their supporters from across the country, tactically employed the institutional device of weekly preaching, or lectureships, to neutralize the influence of Anglican clergymen perceived as royalists dissatisfied with the parliamentarian cause, and to bolster Puritan and pro-parliamentarian preaching during the critical years of 1642–1643. If successfully employed, the device of weekly lectureships would have significantly widened the base of support for the parliament during this crucial period when people began to take sides, prepared for war, and fought its first battles. Such a program of lectureships, no doubt, contributed to the increasing polarization of the religious and political climate of the country. More broadly, this study seeks to add to our understanding of an early phase of the conflict that eventually embroiled the entire British Isles in a decade of gruesome internecine warfare.

scholarly journals Toward Structural Health Monitoring of Civil Structures Based on Self-Sensing Concrete Nanocomposites: A Validation in a Reinforced-Concrete Beam

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Diego L. Castañeda-Saldarriaga ◽  
Joham Alvarez-Montoya ◽  
Vladimir Martínez-Tejada ◽  
Julián Sierra-Pérez
Keyword(s):  
Reinforced Concrete ◽  
Damage Detection ◽  
Direct Current ◽  
Health Monitoring ◽  
Electrical Resistance ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Structural Member ◽  
Rc Beam ◽  
Electric Resistance

AbstractSelf-sensing concrete materials, also known as smart concretes, are emerging as a promising technological development for the construction industry, where novel materials with the capability of providing information about the structural integrity while operating as a structural material are required. Despite progress in the field, there are issues related to the integration of these composites in full-scale structural members that need to be addressed before broad practical implementations. This article reports the manufacturing and multipurpose experimental characterization of a cement-based matrix (CBM) composite with carbon nanotube (CNT) inclusions and its integration inside a representative structural member. Methodologies based on current–voltage (I–V) curves, direct current (DC), and biphasic direct current (BDC) were used to study and characterize the electric resistance of the CNT/CBM composite. Their self-sensing behavior was studied using a compression test, while electric resistance measures were taken. To evaluate the damage detection capability, a CNT/CBM parallelepiped was embedded into a reinforced-concrete beam (RC beam) and tested under three-point bending. Principal finding includes the validation of the material’s piezoresistivity behavior and its suitability to be used as strain sensor. Also, test results showed that manufactured composites exhibit an Ohmic response. The embedded CNT/CBM material exhibited a dominant linear proportionality between electrical resistance values, load magnitude, and strain changes into the RC beam. Finally, a change in the global stiffness (associated with a damage occurrence on the beam) was successfully self-sensed using the manufactured sensor by means of the variation in the electrical resistance. These results demonstrate the potential of CNT/CBM composites to be used in real-world structural health monitoring (SHM) applications for damage detection by identifying changes in stiffness of the monitored structural member.

Historic city, tourism performance and development: The balance of social behaviours in the city of Santiago de Compostela (Spain)

2016 ◽  
Vol 16 (3) ◽  
pp. 282-293 ◽  
Author(s):  
Belén Mª Castro Fernández ◽  
Rubén Camilo Lois González ◽  
Lucrezia Lopez
Keyword(s):  
Numerical Data ◽  
City Centre ◽  
City Development ◽  
Santiago De Compostela ◽  
Final Destination ◽  
City Tourism ◽  
Set Up ◽  
Historic City ◽  
The City ◽  
The Way

Santiago de Compostela is an iconic place. From the 9th century through to the present day the city has acted as the final destination of a major pilgrimage route named after it. In the article we ask ourselves how the contemporary reinvention of the pilgrimage and pilgrimages on the Way of St. James has boosted tourism development in the city. Development has been concentrated in the historic city centre and in the area around the cathedral. The importance of tourism has transformed the significance of the city itself, which acquires a magical component as a place of arrival and encounter for all kinds of visitors. The historic city has been set up in the 20th century as a destination for the Way and for cultural tourism. The buildings, particularly those connected with the pilgrimage route, become highly attractive and symbolic places and tourists carry out a number of rituals in them. They travel and enjoy Santiago as a unique experience. The study of tourism and of the tourist transformation of Santiago de Compostela is undertaken using a qualitative and quantitative method. The article analyses the heritage and symbolic value of the historic centre, together with the growth of its tourism activities. Numerical data are also provided on the perceptions and behaviour of visitors using surveys carried out by the city's Tourism Observatory.

Experimental study on seismic performance of suspended ceiling components

2021 ◽  
Author(s):  
Yong Wang ◽  
Huanjun Jiang ◽  
Chen Wu ◽  
Zihui Xu ◽  
Zhiyuan Qin
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Seismic Performance ◽  
Seismic Vulnerability ◽  
Axial Loading ◽  
Deformation Capacity ◽  
Severe Damage ◽  
Strong Earthquakes ◽  
Static Tests ◽  
Load Carrying

<p>Suspended ceiling systems (SCSs) experienced severe damage during strong earthquakes that occurred in recent years. The capacity of the ceiling component is a crucial factor affecting the seismic performance of SCS. Therefore, a series of static tests on suspended ceiling components under monotonic and cyclic loadings were carried out to investigate the seismic performance of the ceiling components. The ceiling components include main tee splices, cross tee latches and peripheral attachments. All specimens were tested under axial loading. Additionally, the static tests of cross tee latches subjected to shear and bending loadings were performed due to their seismic vulnerability. The failure pattern, load-carrying ability, deformation capacity and energy dissipation of the ceiling components are presented in detail in this study.</p>

Landslides at Lago Riñihue, Chile

1963 ◽  
Vol 53 (6) ◽  
pp. 1403-1414
Author(s):  
Stanley N. Davis ◽  
Juan Karzulovíc K.
Keyword(s):  
Lake Level ◽  
Lateral Spreading ◽  
Unconsolidated Sediments ◽  
Strong Earthquakes ◽  
Earth Flows ◽  
The City

ABSTRACT Strong earthquakes of 22 May 1960 produced three large landslides which blocked the outlet of Lago Riñihue, 65 kilometers east of the city of Valdivia, Chile. The lake level rose 26.5 meters before water began discharging through artificially constructed canals during the last week in June, 1960. The largest landslide involved about 30 million cubic meters of unconsolidated sediments, the intermediate landslide about 6 million cubic meters, and the smallest landslide about 2 million cubic meters. The surface of rupture of the largest landslide is within an 80-meter sequence of Pleistocene lake clays. The clays are underlain by till and overlain by outwash sands and gravels. Movement of the landslide is interpreted as having been principally block gliding and lateral spreading. Secondary landslides within the larger landslide were produced by rotational slumping, debris falls, and earth flows. Several ancient landslides exist in the vicinity of Lago Riñihue, the largest involving more than 100 million cubic meters of unconsolidated sediments. Many of the older landslides also were probably triggered by earthquakes.

scholarly journals Coworking, the Sharing Economy, and the City: Which Role for the ‘Coworking Entrepreneur’?

Urban Science ◽  
2018 ◽  
Vol 2 (3) ◽  
pp. 83 ◽  
Author(s):  
Giacomo Durante ◽  
Margherita Turvani
Keyword(s):  
Information And Communication Technologies ◽  
Organizational Factors ◽  
Communication Technologies ◽  
Sharing Economy ◽  
Internal Factors ◽  
Information And Communication ◽  
Entrepreneurial Action ◽  
Coworking Spaces ◽  
Set Up ◽  
The City

Sharing economy platforms enabled by information and communication technologies (ICTs) are facilitating the diffusion of collaborative workplaces. Coworking spaces are emerging as a distinctive phenomenon in this context, not only fostering knowledge transfer and facilitating innovation, but also affecting the urban and socio-economic fabric contributing to urban regeneration processes at both the local scale and the city scale. Although the positive impacts of coworking on the urban environment are documented, there is still little or no evidence of the economic viability of coworking businesses, and a “coworking bubble” has been evoked. Given the lack of data, a national survey was set up of Italian coworking businesses, aimed at assessing the relevance of internal organizational factors (size, occupancy, profitability, services provided) for the sustainability of coworking businesses. By presenting the results of the survey, we argue that the sustainability and viability of the coworking model is highly dependent on internal factors, strictly related to the entrepreneurial action of coworking managers.

Excavations in the City of London: First Interim Report, 1974–1975

1977 ◽  
Vol 57 (1) ◽  
pp. 31-66 ◽  
Author(s):  
Brian Hobley ◽  
John Schofield ◽  
Tony Dyson ◽  
Peter R. V. Marsden ◽  
Charles Hill ◽  
...  
Keyword(s):  
Urban Archaeology ◽  
Interim Report ◽  
Set Up ◽  
City Of London ◽  
First Time ◽  
The City ◽  
Important Evidence

SummaryThe Department of Urban Archaeology, City of London, was set up in December 1973 as part of Guildhall Museum, now the Museum of London. Since then it has excavated sixteen sites and carried out numerous watching briefs. Most of the formal excavations have been conducted on the vital waterfront sites, made available for the first time, and on the Roman and medieval defences of the City. Important evidence of the elusive Saxon occupation is gradually coming to light, and the work is accompanied by specialist research, particularly finds, environmental and documentary.

scholarly journals FIRST STEPS TOWARDS AN INTEGRATED CITYGML-BASED 3D MODEL OF VIENNA

2016 ◽  
Vol III-4 ◽  
pp. 139-146 ◽  
Author(s):  
G. Agugiaro
Keyword(s):  
Energy Use ◽  
Smart Cities ◽  
Three Dimensional ◽  
3D City Model ◽  
First Results ◽  
Sustainable Energy Systems ◽  
City Model ◽  
Set Up ◽  
The City ◽  
City Models

This paper presents and discusses the results regarding the initial steps (selection, analysis, preparation and eventual integration of a number of datasets) for the creation of an integrated, semantic, three-dimensional, and CityGML-based virtual model of the city of Vienna. CityGML is an international standard conceived specifically as information and data model for semantic city models at urban and territorial scale. It is being adopted by more and more cities all over the world. &lt;br&gt;&lt;br&gt; The work described in this paper is embedded within the European Marie-Curie ITN project “Ci-nergy, Smart cities with sustainable energy systems”, which aims, among the rest, at developing urban decision making and operational optimisation software tools to minimise non-renewable energy use in cities. Given the scope and scale of the project, it is therefore vital to set up a common, unique and spatio-semantically coherent urban model to be used as information hub for all applications being developed. This paper reports about the experiences done so far, it describes the test area and the available data sources, it shows and exemplifies the data integration issues, the strategies developed to solve them in order to obtain the integrated 3D city model. The first results as well as some comments about their quality and limitations are presented, together with the discussion regarding the next steps and some planned improvements.

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