scholarly journals USE OF SINGLE LAYER CONCRETE ARMOUR UNITS AS TOE REINFORCEMENT

2012 ◽  
Vol 1 (33) ◽  
pp. 48
Author(s):  
Martin Young ◽  
John Hayman-Joyce ◽  
Seok Hyeon Kim
Keyword(s):  
Water Depth ◽  
Packing Density ◽  
Single Layer ◽  
Hydraulic Model ◽  
Model Testing ◽  
Environmental Constraints ◽  
Plane Compression ◽  
A Site ◽  
Hydraulic Stability

Detailing and optimization of the toe reinforcement is presented as a case study from the construction of the 5.2km long main breakwater for the new Colombo South Harbour in 18m water depth. During the breakwater design the environmental constraints on supply of large rock armour were recognized, and CORE-LOC™ single layer concrete armour units were selected for the primary armour protection. During construction, supply of relatively small quantities of 8-12t rock for use in the toe reinforcement became an issue, and use of CORE-LOC™ units placed on the flat rock armour apron as an alternative to rock armour toe reinforcement was investigated and implemented. This use is unusual as there is no in-plane compression between units as found when they are placed on the slope. A site based prototype scale trial was conducted to evaluate placing method and criteria, and an “alternate opposing cannon” pattern placement, in rows going seaward from the primary armour, was successful. Packing density and unit spacing is the same as for the primary armour. Hydraulic stability of this alternative toe reinforcement was verified in 2D physical hydraulic model testing.

scholarly journals STABILITY OF INTERLOCKING ARMOUR UNITS ON A BREAKWATER CREST

2012 ◽  
Vol 1 (33) ◽  
pp. 11 ◽  
Author(s):  
Ilse Van den Bosch ◽  
Erik Ten Oever ◽  
Pieter Bakker ◽  
Markus Muttray
Keyword(s):  
Wave Height ◽  
Water Depth ◽  
Packing Density ◽  
Single Layer ◽  
Hydraulic Model ◽  
Model Tests ◽  
Wave Steepness ◽  
Design Wave Height ◽  
The Stability ◽  
Hydraulic Stability

The hydraulic stability of single layer, interlocking armour units on low crested and submerged breakwaters was investigated in 2D hydraulic model tests. Displacements of armour units and rocking were monitored and have been applied as indicators for the armour layer stability on the crest, front and rear slope. The effect of freeboard, packing density and wave steepness on the armour layer stability have been investigated. The stability of interlocking concrete armour units on low crested and submerged structures is qualitatively different from rock armour. About 40% to 50% larger armour units are required on the seaward slope and crest of low crested structures (as compared to conventional high crested breakwaters). About 35% larger armour units are required on the rear slope. Larger armour units are not required on submerged breakwaters if the water depth on the crest exceeds 50% of design wave height.

CONTEXTUALIZING PALIMPSEST OF COLLECTIVE MEMORY IN AN URBAN HERITAGE SITE: Case Study of Chahar Bagh, Shiraz - Iran

2015 ◽  
Vol 9 (1) ◽  
pp. 218 ◽  
Author(s):  
Leila Mahmoudi Farahani ◽  
Marzieh Setayesh ◽  
Leila Shokrollahi
Keyword(s):  
Collective Memory ◽  
Active Part ◽  
Collective Memories ◽  
Cultural Life ◽  
Urban Heritage ◽  
Heritage Site ◽  
Historical Sites ◽  
A Site ◽  
Historical Centre

A landscape or site, which has been inhabited for long, consists of layers of history. This history is sometimes reserved in forms of small physical remnants, monuments, memorials, names or collective memories of destruction and reconstruction. In this sense, a site/landscape can be presumed as what Derrida refers to as a “palimpsest”. A palimpsest whose character is identified in a duality between the existing layers of meaning accumulated through time, and the act of erasing them to make room for the new to appear. In this study, the spatial collective memory of the Chahar Bagh site which is located in the historical centre of Shiraz will be investigated as a contextualized palimpsest, with various projects adjacent one another; each conceptualized and constructed within various historical settings; while the site as a heritage is still an active part of the city’s cultural life. Through analysing the different layers of meaning corresponding to these adjacent projects, a number of principals for reading the complexities of similar historical sites can be driven.

DESIGN-BUILD: AN EFFECTIVE APPROACH FOR ARCHITECTURE STUDIO EDUCATION

2018 ◽  
Vol 12 (2) ◽  
pp. 146 ◽  
Author(s):  
Nabil Mohareb ◽  
Sara Maassarani
Keyword(s):  
Material Selection ◽  
Environmental Constraints ◽  
Design Project ◽  
Construction Methods ◽  
Physical Scale ◽  
Design Build ◽  
Simulation Results ◽  
Education Process ◽  
Real Target

Current architecture studios are missing an important phase in the education process, which is constructing the students’ conceptual ideas on a real physical scale. The design-build approach enables the students to test their ideas, theories, material selection, construction methods, environmental constraints, simulation results, level of space functionality and other important aspects when used by real target clients in an existing context. This paper aims to highlight the importance of using the design-build method through discussing a design project case study carried out by the Masters of Architecture design programme students at Beirut Arab University, who have built prototype units for refugees on a 1:1 scale.

An Example to Us All: Child Development and Identity Construction in Early 20th-Century Playgrounds

10.1068/a3237 ◽  
2000 ◽  
Vol 32 (4) ◽  
pp. 599-616 ◽  
Author(s):  
Elizabeth A Gagen
Keyword(s):  
Child Development ◽  
Public Space ◽  
20Th Century ◽  
The United States ◽  
Development Theory ◽  
Gender Identities ◽  
Construction Of Identity ◽  
A Site ◽  
Us Cities

At the turn of the 20th century, children's play came under new and heightened scrutiny by urban reformers. As conditions in US cities threatened traditional notions of order, reformers sought new ways to direct urban-social development. In this paper I explore playground reform as an institutional response that aimed to produce and promote ideal gender identities in children. Supervised summer playgrounds were established across the United States as a means of drawing children off the street and into a corrective environment. Drawing from literature published by the Playground Association of America and a case study of playground management in Cambridge, MA, I explore playground training as a means of constructing gender identities in and through public space. Playground reformers asserted, drawing from child development theory, that the child's body was a conduit through which ‘inner’ identity surfaced. The child's body became a site through which gender identities could be both monitored and produced, compelling reformers to locate playgrounds in public, visible settings. Reformers' conviction that exposing girls to public vision threatened their development motivated a series of spatial restrictions. Whereas boys were unambiguously displayed to public audiences, girls' playgrounds were organised to accommodate this fear. Playground reformers' shrewd spatial tactics exemplify the ways in which institutional authorities conceive of and deploy space toward the construction of identity.

scholarly journals Vera Lynn on Screen: Popular Music and the ‘People's War’

2017 ◽  
Vol 14 (2) ◽  
pp. 245-270 ◽  
Author(s):  
KATE GUTHRIE
Keyword(s):  
Popular Music ◽  
Art Music ◽  
Second World War ◽  
World War ◽  
Recent Scholarship ◽  
A Site ◽  
Second World

AbstractBy the outbreak of the Second World War in Britain, critics had spent several decades negotiating the supposed distinctions between highbrow and lowbrow culture, as recent scholarship has shown. What has received comparatively little attention is how the demands of wartime living changed the stakes of the debate. This article addresses this lacuna, exploring how war invited a reassessment of the relative merits of art and popular music. Perhaps the most iconic British singer of the period, Vera Lynn provides a case study. Focusing on her first film vehicle,We'll Meet Again(1942), I explore how Lynn's character mediated the highbrow/lowbrow conflict – for example, by presenting popular music as a site of community, while disparaging art music for its minority appeal. In so doing, I argue, the film not only promoted Lynn's star persona, but also intervened in a broader debate about the value of entertainment for a nation at war.

Management and environmental constraints to rice yield within a village irrigation system ? A case study from Sri Lanka

GeoJournal ◽  
1988 ◽  
Vol 17 (3) ◽  
Author(s):  
E. Dal�us ◽  
O. Palm ◽  
K. Sandell ◽  
S.N. Jayawardena ◽  
G.D. Siripala
Keyword(s):  
Sri Lanka ◽  
Rice Yield ◽  
Irrigation System ◽  
Environmental Constraints ◽  
System A
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