scholarly journals A study on the strengthening of buildings designed based on 3rd edition of 2800 codes by utilizing viscous dampers

2020 ◽  
Author(s):  
Himan mohammad eisa
Keyword(s):  
Stress Ratio ◽  
Relative Displacement ◽  
Existing Buildings ◽  
Viscous Dampers ◽  
Allowable Limit ◽  
Existing Building ◽  
Energy Absorbing ◽  
Existing Structure

One of the methods that have been considered in recent years for the reinforcement of structures is the use of energy-absorbing systems. A variety of energy-absorbing systems have been developed and introduced, including liquid, viscous dampers. The main purpose of this study is to evaluate the efficiency of viscous dampers in absorbing forces caused by earthquakes and seismic improvement of structures, as well as the feasibility of increasing the floors of an existing structure by using these dampers. For this purpose, three different models with fixed plans and three different numbers of floors as five, nine, and thirteen have selected, and the possibility of increasing one floor to them by using viscous dampers has investigated. The results indicated that by adding a floor to the existing buildings, the stress ratio in some columns and also the relative displacement exceeds the allowable limit; however, viscous dampers can significantly decrease the stresses and displacements and can be used to expand the number of floors of an existing building.

scholarly journals ANALISIS DAMPAK PEMBUKAAN GALIAN UNTUK CONNECTING BASEMENT TERHADAP BANGUNAN EKSISTING DENGAN METODE FINITE ELEMENT

2021 ◽  
Vol 5 (2) ◽  
pp. 401
Author(s):  
Della Amelia ◽  
Inda Sumarli ◽  
Ali Iskandar
Keyword(s):  
Finite Element ◽  
Ground Surface ◽  
Model Material ◽  
Diaphragm Wall ◽  
Existing Buildings ◽  
Deep Excavation ◽  
Allowable Limit ◽  
Finite Element Program ◽  
Existing Building ◽  
Static Conditions

In a deep excavation construction that adjacent to the existing buildings there is a concern that it will have a bad impact or effect on adjacent buildings.  The effect of deep excavation induced deformation of the existing structures due to ground movements and ground surface settlement behind the wall which can cause a tilt of the building. The objective of this study is to observe the effect of deep excavation (7 storey basement) adjacent to the existing buildings with 7 and 5 storey basement located in South Jakarta. The basement is connected to the basement of the existing building so that the effect of diaphragm wall opening for connecting basement towards the substructures of the existing building is observed. This study was conducted by observing the deformation that occurs in the diaphragm of the existing building, and also observing the internal forces acting on the basement floors slabs of the existing buildings. Observations were made using a three-dimensional finite element program with the most commonly used material model for analysis of deep excavation, The Hardening Soil Model. The analysis was performed with drained conditions with phreatic calculation type and only calculated the static conditions. Results indicate that the deflection that occurs after the final stage of excavation is still within the allowable limit according to the SNI 8460:2017, which is less than 14 centimeters on the diaphragm wall of the existing buildings. Keywords: Deep Excavation; Connecting Basement; Diaphragm Wall; Hardening Soil; Finite Element AbstrakPada suatu konstruksi galian dalam yang berdekatan dengan suatu bangunan lain dikhawatirkan akan memberikan dampak atau efek yang buruk terhadap bangunan di sekitarnya. Efek dari galian dalam tersebut menyebabkan terjadinya deformasi pada struktur dari bangunan di sekitarnya akibat dari pergerakan tanah dan penurunan permukaan tanah di belakang dinding yang dapat menyebabkan bangunan tersebut menjadi miring. Tujuan dari penelitian ini yaitu untuk mengamati pengaruh pekerjaan galian dalam (basement dengan 7 lantai) yang berdekatan dengan bangunan sekitar dengan basement 5 lantai dan 7 lantai yang berlokasi di Jakarta Selatan. Basement yang dimodelkan terkoneksi dengan basement dari bangunan eksisting sehingga diamati pengaruh bukaan dinding diafragma untuk connecting basement terhadap struktur bawah bangunan eksisting. Penelitian ini dilakukan dengan melihat deformasi yang terjadi pada dinding diafragma dari bangunan eksisting, dan juga mengamati gaya-gaya dalam yang bekerja pada pelat lantai basement dari bangunan eksisting. Pengamatan dilakukan dengan menggunakan program elemen hingga tiga dimensi dengan model material yang paling umum digunakan yaitu Hardening Soil untuk analisis galian dalam. Analisis dilakukan dengan kondisi drained dengan tipe kalkulasi phreatic serta hanya memperhitungkan keadaan static. Hasil menunjukkan bahwa defleksi yang terjadi setelah tahapan terakhir pekerjaan galian dalam yaitu masih dalam batas yang diijinkan menurut SNI 8460:2017 yaitu dibawah dari 14 cm pada dinding diafragma bangunan eksisting. 

scholarly journals Infected Interiors:

IDEA JOURNAL ◽  
2006 ◽  
pp. 1-13 ◽  
Author(s):  
Graeme Brooker
Keyword(s):  
Existing Buildings ◽  
Existing Building ◽  
The Past ◽  
Modification Process ◽  
Course Of Action ◽  
Continuous Approach ◽  
Starting Point ◽  
A Site ◽  
Complex Matter ◽  
Existing Structure

Remodelling existing buildings is the process of significantly changing a host building or structure to accommodate new use. It differs to practices such as preservation and conservation in that it is the process of substantially altering an existing building. Remodelling could be described as a process that encourages a continuous approach to the adaptation of an enclosure or a site. The transformation of an existing structure is a procedure that initially consists of reading the site: a course of action that ensures solid or concealed matter such as the structure or the narrative of the building can be exposed and then developed as potential generators for the modification process - a course of action that Rodolfo Machado describes as: ‘... a process of providing a balance between the past and the future’ (Machado, 1976, p. 27). This is a paper about the transformation of existing buildings where the history or narrative of the place that is to be reused is complicated by political, ideological, or an odious previous function. A site or building is described as contaminated when its past is dominated by a previous use that is disagreeable or objectionable. The edification or censorship of these infections is a complex matter for the designer to consider in the remodelling process. This paper examines three case studies where the designer has analysed and used the contamination of the building as a generator for remodelling. It suggests that there are three general approaches when using contamination as a starting point when significantly altering the interiors of infected existing buildings.

Review of methods for evaluating adaptability of buildings

2019 ◽  
Vol 37 (3) ◽  
pp. 273-287 ◽  
Author(s):  
Zoraya Roldán Rockow ◽  
Brandon Ross ◽  
Anna K. Black
Keyword(s):  
Life Cycle ◽  
Future Research ◽  
Existing Buildings ◽  
Content Type ◽  
Existing Building ◽  
Adaptation Decision ◽  
Building Life Cycle ◽  
Development And Validation ◽  
Context Features ◽  
New Buildings

Purpose The purpose of this paper is to present a review of existing models and tools for evaluating the adaptability of buildings. A baseline of the current state of the art in adaptability evaluation and adaptation decision support is established; from this baseline, gaps for future research are recommended. Design/methodology/approach A literature review was conducted to identify papers describing adaptability models and tools. The identified models were characterized based on their focus (new buildings, existing buildings, building life cycle), considered variables (physical and/or context features) and degree/type of validation. Findings Models can be grouped as those focusing on: evaluating adaptation decisions for existing buildings; the design of new buildings for future adaptation; and understanding adaptation throughout a building life cycle. Models focusing on existing building evaluation are further in development and validation than the other model types; as such, they are more suitable for use by practitioners. Another finding is that modeling of adaptability in buildings is still in its nascent stage and that data-driven quantitative modeling is a prime area for future research. Originality/value This paper is the first comprehensive review of models and tools for evaluating adaptability. Other works have evaluated the topic of adaptability more broadly, but this is the first paper to systematically characterize existing models and tools. Based on the review future, research topics are recommended.

Maximizing sustainability of existing buildings within limited upgrade budgets

2018 ◽  
Vol 45 (9) ◽  
pp. 705-716 ◽  
Author(s):  
Moatassem Abdallah ◽  
Boateng Akyeampong ◽  
Khaled El-Rayes
Keyword(s):  
Optimization Model ◽  
Present Model ◽  
Environmental Design ◽  
Decision Makers ◽  
Existing Buildings ◽  
Existing Building ◽  
Certification Programs ◽  
Green Certification ◽  
Selection Of

Existing buildings, especially aging ones, are currently in urgent need of upgrading to improve their performance and potentially achieve green certification. Building owners often need to identify and implement building upgrades that maximize the sustainability of their buildings as well as achieve green certification programs such as the Leadership in Energy and Environmental Design (LEED). This paper presents the development of an optimization model that maximizes the number of earned LEED points for existing buildings within a specified upgrade budget. A case study of an existing building is used to demonstrate the use of the optimization model and illustrate its capabilities. This research presents new methodology for optimizing the selection of building upgrades to maximize the sustainability of existing buildings and achieve green certification within limited budgets. The present model is expected to support decision-makers, building owners and operators, building managers, and contractors to optimize the use of their upgrade budgets and maximize sustainability of their buildings.

Strengthening Research in the Longitudinal Frames of Prefabricated Structures with Viscous Dampers

2013 ◽  
Vol 671-674 ◽  
pp. 782-785
Author(s):  
Bin He ◽  
Jin Lai Pang ◽  
Cheng Qing Liu
Keyword(s):  
Seismic Performance ◽  
Pushover Analysis ◽  
Vertical Direction ◽  
Time History ◽  
Nonlinear Time History Analysis ◽  
Viscous Dampers ◽  
Existing Building ◽  
Concrete Frame ◽  
Uniform Drift ◽  
Nonlinear Time History

For the lack of research in the longitudinal frame of prefabricated structure for its weak lateral stiffness, pushover analysis is conducted to evaluate the seismic performance of a fabricated concrete frame. Based on case study, the strengthening strategies with viscous dampers are analyzed. In view of the undesirable drift distribution and failure mode in the existing building, it is believed that arrangement of dampers should be designed to attain a uniform drift distribution. Based on the nonlinear time history analysis method, the strategy of damper allocation in vertical direction of the structure is investigated .Results indicate that a proper design might be attained based on the property of existing system, leading to a uniform drift distribution and better seismic performance.

scholarly journals A Digital-Twin Evaluation of Net Zero Energy Building for Existing Buildings

2018 ◽  
Vol 11 (1) ◽  
pp. 159 ◽  
Author(s):  
Sakdirat Kaewunruen ◽  
Panrawee Rungskunroch ◽  
Joshua Welsh
Keyword(s):  
Energy Demand ◽  
Fossil Fuels ◽  
Geographical Area ◽  
Existing Buildings ◽  
Zero Energy ◽  
Existing Building ◽  
Digital Twin ◽  
Net Zero Energy ◽  
Net Zero ◽  
The Uk

With buildings around the world accounting for nearly one-third of global energy demand and the availability of fossil fuels constantly on the decline, there is a need to ensure that this energy demand is efficiently and effectively managed using renewable energy now more than ever. Most research and case studies have focused on energy efficiency of ‘new’ buildings. In this study, both technical and financial viability of Net Zero Energy Buildings (NZEB) for ‘existing’ buildings will be highlighted. A rigorous review of open literatures concerning seven principal areas that in themselves define the concept of NZEB building is carried out. In practice, a suitable option of the NZEB solutions is needed for the evaluation and improvement for a specific geographical area. The evaluation and improvement has been carried out using a novel hierarchy-flow chart coupled with a Building Information Model (BIM). This BIM or digital twin is then used to thoroughly visualize each option, promote collaboration among stakeholders, and accurately estimate associated costs and associated technical issues encountered with producing an NZEB in a pre-determined location. This paper also provides a future model for NZEB applications in existing buildings, which applies renewable technologies to the building by aiming to identify ultimate benefit of the building especially in terms of effectiveness and efficiency in energy consumption. It is revealed that the digital twin is proven to be feasible for all renewable technologies applied on the NZEB buildings. Based on the case study in the UK, it can be affirmed that the suitable NZEB solution for an existing building can achieve the 23 year return period.

scholarly journals Evaluation of mould growth risks due to air leakage through air cavity of the building walls

2019 ◽  
Vol 282 ◽  
pp. 02060 ◽  
Author(s):  
Xinyuan Dang ◽  
Shuichi Hokoi ◽  
Yonghui Li ◽  
Changchang Xia ◽  
Ma Yan
Keyword(s):  
Measured Data ◽  
Two Dimensional ◽  
Air Leakage ◽  
Mould Growth ◽  
Existing Buildings ◽  
Air Cavity ◽  
Existing Building ◽  
Hygrothermal Simulation ◽  
Building Walls ◽  
Indoor And Outdoor

Mould growth causes damage and poses high risk to a large number of existing buildings and their users. Air leakage through air cavity of the building walls, such as gaps between walls and some pipes penetrating the walls, produces obvious hygrothermal exchange, altering the temperature and humidity distribution of the walls. It would promote condensation and mould growth. Air cavity are common on the walls of existing buildings. In order to make a quantitative analysis on the mould growth risks due to air leakage through air cavity, an office room in an existing building in Nanjing, China was selected and hygrothermometers were arranged indoor and outdoor for monitoring. The measured results showed the room was in high temperature and relative humidity from June to early September. Two-dimensional hygrothermal simulation was made to investigate the hygrothermal conditions of the walls with air cavity, using the measured data as boundary conditions and validation for the numerical simulation. Mould growth risks under these situations were estimated.

Analysis about Existing Buildings for Energy Saving

2012 ◽  
Vol 193-194 ◽  
pp. 62-65
Author(s):  
Xue Ying Wang ◽  
Dong Xu ◽  
Ya Jun Wu
Keyword(s):  
Energy Saving ◽  
Social Economy ◽  
Building Energy ◽  
Quality Level ◽  
Existing Buildings ◽  
Policy Suggestion ◽  
Existing Building ◽  
The Doors

Along with the quick development of social economy, consumption of the energy is more and more serious. Saving energy’s reformation not only can lower a building energy effectively but also can improve the environment of the inner and exterior of building. For improving the quality level of life, it has very aggressive meaning. Existing building consuming energy is serious in all buildings.Its economy energy reformation is particularly important. The paper set out a few current aspects economize on energy the technique project from the doors and windows, out wall, and roof etc. and policy suggestion of reformation from the actual circumstance.

Decision making criteria for adaptive reuse strategy in UNESCO world heritage city

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Noorzalifah Mohamed ◽  
Kartina Alauddin
Keyword(s):  
Decision Making ◽  
Adaptive Reuse ◽  
World Heritage ◽  
Structural Condition ◽  
The Body ◽  
Existing Buildings ◽  
Unesco World Heritage ◽  
Content Type ◽  
Existing Building ◽  
Decision Making Criteria

Purpose Within the next 20–30 years, adaptive reuse will have the greatest potential to reduce the built environment's environmental impact. Despite this, stakeholders still do not have sufficient points of reference in justifying and evaluating their adaptation practice decisions. The decision to reuse a building involves a complex set of considerations, including economic, social, environmental, legislative and architectural issues. The purpose of this paper is to investigate the unique decision-making criteria among stakeholders when considering adaptive reuse of an existing building asset in Malaysian heritage cities. Design/Methodology/Approach Thirty (30) unique criteria of decision-making were identified through a detailed literature review. The quantitative method of a self-completion questionnaire survey was conducted among stakeholders, including architects, valuers, planners, government department, developers and building owners. There were asked about their opinion and view on the criteria that could have influenced the decision-making in considering the adaptive reuse of the existing buildings in two heritage cities in the states of Penang and Malacca, Malaysia. Thus, it is the aim of this paper to evaluate and reveal the key criteria pertaining to this. Findings The analysis shows that there are seven key criteria that influence the decision-making of adaptive reuse of existing building: building value; building suitability; structural condition; official plan and zoning; building code; client requirement and heritage designated. In this regard, while “building value” factors were the key determinants in deciding whether to reuse or demolish, the asset’s suitability and structural condition, as well as rules, were also taken into account. Additionally, the environmental, economic and social tenets of sustainability were also identified as important, but were given less weight in matters concerning reuse. And due to the fact that many of the existing buildings are rapidly becoming obsolete, they are now increasingly being prioritized during the adaptive reuse decision-making process to ensure long-term outcomes. Research Limitations/Implications The research is limited owing to the difficulty in obtaining accurate information concerning the number of decision agents who have been involved in the adaptive reuse of existing buildings. Thus, the respondents in this research were randomly selected. Due to this limitation, the result does not encompass the whole Malaysia, only the stakeholders in Penang and Malacca have been selected the respondents in this study as these states are listed in the UNESCO World Heritage. Social Implications When deciding whether to reuse or demolish an existing building, the proposed criteria will outline the crucial areas that must be examined by owners, developers and key project stakeholders. It can also be used to assess the financial, physical and social aspects of a cultural project. Originality/Value This paper adds to the body of knowledge concerning decision-making criteria for adaptive reuse strategies in achieving heritage city sustainability.

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