The Captive- and Short-Column Effects

2005 ◽  
Vol 21 (1) ◽  
pp. 141-160 ◽  
Author(s):  
L. Teresa Guevara ◽  
Luis E. García

Captive-column and short-column conditions are a significant source of serious earthquake damage. These conditions originate in the architectural design of the building. For this reason, this paper first presents the architectural reasons why these conditions occur and explains in nontechnical language their detrimental effect on building response. The effects are presented from a multidisciplinary perspective—engineering, architecture, and construction—because their solution can only be achieved by an integrated approach to building design that recognizes the interaction of these three disciplines. The accidental modification to the original structural configuration leading to a captive column by restricting its freedom to deform laterally due to the presence of nonstructural elements that partially confine it is presented. The case of short columns subjected to earthquake effects is also discussed. Examples of damage due to these effects in numerous earthquakes are presented, and the architectural decisions leading to captive and short columns are reviewed. The structural explanation of the behavior is discussed. Experimental research related to short and captive columns is presented. Recommendations to handle this type of problem are given.

2020 ◽  
Vol 12 (24) ◽  
pp. 10417
Author(s):  
Alessandro D’Amico ◽  
Giacomo Bergonzoni ◽  
Agnese Pini ◽  
Edoardo Currà

The relationship between users and the built environment represents a fundamental aspect of health. The factors that define the properties linked to health and well-being are increasingly becoming part of building design. In these terms, building information modelling (BIM) and BIM-based performance simulation take on a priority role. Among the key features for the design of Healthy Buildings, indoor air quality (IAQ) plays a central role. There are numerous indoor pollutants with significant health effects; volatile organic compounds (VOCs) are to be mentioned among these. The paper presents the proposal of an integrated workflow in the BIM process for the check and control of VOC emissions from building materials and their concentration in confined environments. The workflow is developed through the systematisation of IAQ parameters for the open BIM standard, the integration in the BIM process of a numerical model for the prediction of the VOCs concentration in the indoor environment, and the development of model checkers for performance verification. The results show a good adhesion between the numerical model and the implementation in BIM, providing the designer with a rapid control instrument of IAQ in the various phases of the building design. The present study is the first development focused on TVOC, but implementable concerning other aspects of IAQ, as needed for the effectiveness of performance building-based design for health and wellness issues.


2021 ◽  
Vol 3 (4) ◽  
pp. 295-311
Author(s):  
AbuRawi Mustafa ALMARKIYAH ◽  
Fouziya Alzarqani Ipraheem FADHLULLAH

Tripoli is a city of a Mediterranean Sea climate; this has contributed with some social and religious factors to affect the architectural and urban design, which all originally has come from the Islamic content. This study argues the climatic features of Tripoli in order to show the ways followed by the Libyan Muslim architect. In other words, these ways were used to adapt with the climate and create the demanding architectural treatments, which have served the building units. This is considered as a study case that can discuss the possibility of the climatic reflection on the walls. That is to say, the walls’ thickness, the type of the used substance in building, the substance’s properties, the type of roof used in covering the building units and the architectural design of the building as treatments achieved professionally by the architect in decreasing the heat in summer and increasing the heat in winter through the mass block. Additionally, the researchers have stated that Tripoli’s building design respected the privacy of the inhabitants and their isolation from the world outside their buildings. That is because they wanted to have their own cold spaces inside which were rich of light, air and shadow. As a result of the aforementioned considerations, the architectural buildings contained the uncovered space and the broken entrance to keep the privacy from the passengers and to protect the inhabitants from wind and sand. These were regarded as final solutions for the architectural and climatic problem. Further, this study illustrates the active role of using the planning including the architectural formations and the treatments of motion path. That is according to their width, their length, their form, their guidance and their direction change in order to make shadow and isolate the front of buildings. This also contributed to give the streets the northern wind which in turn helped to keep the air moving as long as possible to tone down the climatic influences. Moreover, the planning aimed to show its turn through analytical, architectural and documentary survey for realistic examples in the archeological registrar of the potential city treatments. These architectural elements were important in making the sustainable architecture in respect to the environment and human relaxation requirements. Finally, the researchers measured the following factors temperatures, wind, rain, and ratio humidity for variety of spaces in the city. That was followed by qualitative and quantitative statistical analysis supported by graphs


2018 ◽  
Vol 7 (3) ◽  
pp. 1376
Author(s):  
N Chaitanya ◽  
V Ranga Rao ◽  
M Achyutha Kumar Reddy

The purpose of this paper is to compare the behaviour of composite reinforced concrete square short columns and conventional square short column. Experiments are conducted on four axially loaded column specimens till failure. Among four specimens, two are conventional and remaining two columns are having equal angles as main reinforcement. Short columns are designed using IS 456 2000. The obtained details of main reinforcement are replaced in area wise by equal angle (ISA 2525). The tie reinforcement used to withhold the main reinforcement in position are retained with the same deformed bars. Performance of columns are measured in terms of load carrying capacity, longitudinal strain, stress, crushing modes, strains in each face using strain gauges. Outcome of the experiments are compared and plotted in the form of stress vs strain of the column. A finite element model was developed using Abaqus to simulate the results.  


Author(s):  
Frank Butera ◽  
Keith Hewett

Maximising cross ventilation is a low energy method of naturally ventilating and providing heating and cooling to deep plan spaces. Significant reduction in the emission of greenhouse gases can be achieved through minimising the use of mechanical systems in regions with climatic conditions that support the use of natural ventilation. Arup has provided input into the design of a louvered facade for the control of external noise for Brisbane Domestic Airport. A full scale prototype facade was constructed and noise transmission loss measurements were undertaken. The results indicate that significant noise reduction can be achieved to enable compliance with the internal noise limits for airport terminals, whilst using natural ventilation. The findings from this research will directly benefit building designers and innovators in the pursuit of achieving sustainable building design.


Arsitektura ◽  
2017 ◽  
Vol 14 (1) ◽  
Author(s):  
Dewi Saraswati ◽  
Ahmad Farkhan ◽  
Amin Sumadyo

<em>The design of Sarangan Lake resort done by the needs of tourist on its area, unfullfield of tourist needs on accommodation facilities, increasing number of uncare building towards negative impact to the environment, so the purpose from this design is to get a building design that could provide accommodation facilities to the tourist of Sarangan Lake, with the design that concern about environment. The design issue is how ecological architect can be applied into design of Sarangan Lake resort. Design method is using architectural design, started from initial idea, preliminary understanding of architecture about the planned object, research and problem formulation, literature study as substantial reference, data analysis and information, analysis of general and specific approach towards designed object and formulation of design concept, analysis of design concept approach which more specific about the to-be-designed object, and architectural design transformation and preliminary design as well. The result is a design concept of resort hotel facilities as lodging accommodations by applying the characteristic of the ecological architect to the building design.</em>


Arsitektura ◽  
2017 ◽  
Vol 14 (1) ◽  
Author(s):  
Tri Mardiyanti ◽  
Suparno Suparno ◽  
Hari Yuliarso

<em>Design Resort on Wedi Ombo beach against the background of growth of tourists increasing every year, but a means of lodging accommodations not meet the need for accommodation for tourists, so the purpose of this scheme is to get a building design that can facilitate tourism activities, facilitate the activities of coastal tourism into a building form that apply to the tropical climate adaptation in coastal Wedi Ombo environments. Design issues are: how to apply the concept of tropical architectural design in the form of Wedi Ombo beach resort building. The method used is a method of planning and architectural design ranging from the initial idea and understanding of the object that  planned, the formulation of the problem, the collection of physical and potential data area which is then analyzed and examined to obtain the results of the application of the concept of tropical architecture of the building. The result obtained is a design of a resort, which can optimize the potential of the nature of tropical climate on the design of the building, so there is a sense of comfort for the users of the building at the time were in the building.</em>


Arsitektura ◽  
2017 ◽  
Vol 14 (1) ◽  
Author(s):  
Kartika Fitri Annisa ◽  
Agung Kumoro Wahyuwibowo ◽  
Suparno Suparno

<em>The design of Urban Resort motivated by the increasing number of tourists coming to the city of Solo as increasing tourism potential. The increasing number of tourist coming and tourist potential are not accompanied by an increase in the numbers LOS (Length Of Stay) and the availability of lodging facilities that accommodate in Solo. The purpose of this scheme is to get a building design that is able to accommodate the needs of lodging accommodations and recreation in the form of a resort hotel in the center of the city of Solo with the implementation of ecological architecture as a form of support to the Government to make Solo as an ecological city. Design issues are: how the concept of ecological architecture can be applied in the design of Urban Resort in Surakarta. The method used is the method of architectural design with mix of the theory about ecological architecture with Government Regulation about requirements of five star resort hotel. The results obtained are the design of urban resort as a means of lodging accommodations, and public space as a tourist attraction and people who apply the concept of ecology architecture on the shape and appearance of the building. So that the building can give the impression of a comfortable and natural even though the resort hotel located in the middle city of Solo.</em>


2021 ◽  
Author(s):  
◽  
Myren Burnett

<p>Urban Ensembles explores the way in which landscape and architecture can be employed together within the design of a steep, urban site. Lyttelton is a small port town on the border of Christchurch, settled in the foothills of a harbour formed by a major volcanic eruption. This rugged setting, with steeply sloping urban terrain, presents an interesting challenge when designing an urban development. The site was badly damaged in a series of earthquakes in 2010-2011, and many of the town’s oldest buildings, heritage structures dating back to the colonial settlement era, were destroyed. This has left a void in the heart of Lyttelton, and caused the loss of much of the tourism business that the town relies upon for its income. This thesis takes a methodological approach to the design of landscape architecture on such a challenging site. A range of techniques are explored, drawing from both landscape and architecture to explore the roles that each discipline plays in the design of urban spaces. The frequent imbalance between disciplines is addressed both through the literature review and design method, as this landscape architecture thesis draws on architectural design as a tool for generating spaces which fall somewhere in between the two ideals of interior and exterior. The final design proposal is an alternative rebuild plan for the central business area to the south of London St, and also addresses the relationships between that site and the surrounding context, both urban and environmental. The aim of this design is to create a series of interconnected spaces which have a strong relationship to the surrounding harbour setting, and also to facilitate development of the pedestrian spaces throughout the block and encouraging the development of activity at the street level, through the interface between buildings and landscape.</p>


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