GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Review of creep modelling for predicting of long-term behavior of glued-laminated bamboo structures
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 01023-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 01023-
    Abstract: Glued-laminated bamboo has been widely used to substitute timber as a building material. This material classified as a viscoelastic material because it exhibiting properties that are common to both solid and liquid. Under long-term constant loading, the glued-laminated bamboo structures will experience creep deformation. The mechanical, power law and finite element models are common methods that used to predict the creep for viscoelastic material, some of them have advantages and disadvantages. In this manuscript, modelling of long-term creep is reviewed. The fundamental concepts of creep modelling, the influence of variable load level, and humidity were discussed to develop for computational applications. By using FEA program, a subroutine has been developed by previous researchers to accommodate the effect of orthotropic properties. In the future, the subroutine will be used and developed for numerical creep analysis of glued-laminated bamboo.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925801023
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    A mockup unit of the an-eco budget bamboo chalet: design and cost estimation analysis
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 01010-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 01010-
    Abstract: To succeed by 2050, Malaysia visions would need to be ecologically sustainable. To align with this strategy, a mock-up unit of an-eco budget bamboo chalet is proposed and designed with the aim to provide an affordable and sustainable chalet using local sustainability features and expand the use of natural resources. A sustainable bamboo chalet requires proper initial treatments and preservation in maintaining its esthetic appearance and strength. Otherwise, it can be less durable and under certain circumstances would incur high maintenance cost to the owner. In this study, the proposed unit of an eco-budget bamboo chalet is designed and analyzed using the Staad Pro V8i software. The projection cost of the bamboo chalet in the next 25 years is studied comparatively in which involves a comparison of using a different material, i.e. concrete with the same built-up area. The bamboo chalet had a built-up land area of approximately 7.5 m x 7 m (53 m 2 ) and is made of 95% bamboo which comprises of two different species, i.e. Bambusa Vulgaris and Dendrocalamus Asper Bamboo. The results showed that construction material of the chalet saves up to 18% more when using bamboo compared to concrete. However, the total projected cost of the chalet for the next 25 years by using bamboo was 14% higher compared to concrete. Therefore, emphasis on the usage of bamboo for long-term strategy is required to maintain and control the gradual trend cost incurred if green building is to be built in Malaysia.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925801010
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Displacement-based design of Reinforced Concrete Special Moment Frame (RC-SMF) with Vertical Irregularity
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 05014-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 05014-
    Abstract: Reinforced concrete Special Moment Frame (RC-SMF) with irregularity in dimension experiences large inelastic deformation under ground motion. The building code for designing structural elements generally is focused on satisfying the strength and serviceability. On the other hand, the displacement-based design (DBD) procedure is based on building performance level. This paper presents a devoted study of designing structural elements of 8 story RC-SMF with vertical irregularity using the DBD method. This method is mainly using energy-work balance concept with pre-selected yield mechanism and target drift. Moreover, a new lateral force distribution method is used in this study which accounts for inelastic dynamic response and higher mode effects. Strong column-weak beam mechanism is used to design beam and column, and beam moment capacity of each floor is calculated by equating external work to internal work approach. Furthermore, column design strength is taken as the combination of factored gravity loads and maximum expected strength of the beam. The time history analysis results show that story drift is below than the target drift and achieve the desired performance level. Moreover, the results also show lateral force distribution is very close to the lateral shear distribution which obtained from time history analysis.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925805014
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Cost prediction model based on system dynamics in water resource project
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 02027-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 02027-
    Abstract: Project’s cost is one of important components in project achievement. Because of the uniqueness of construction projects, cost estimation always differs from project to project. The rate of cost components always change over time make difficult to forecast the cost for the upcoming project. The cost component consists of many influencing variables where there is interrelationship each other affecting to the total project cost. This paper objective is to develop a cost prediction model to assist the project planners in cost estimation for future projects. System dynamic is one of the appropriate methods to analyse system behaviour with interrelationship referring to the historic data, so it is able to predict the future project. Developing the model, primary and secondary data are collected from previous studies, interview with the government planner and survey in Malang Regency. The model simulation is Brick work unit with its components. Data from last thirteen years are used to verify and validate the developed model by causal loop diagram as a basic method in system dynamic. The finding showed that the model is closed to real condition through the validation mechanism. The developed system is useful in decision making of budget planning based on work quantity.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925802027
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Behavior of wood beam connection using staples subjected to in-plane moment
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 05008-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 05008-
    Abstract: It is very frequent that solid wood beams need to be connected one to another to obtain a longer beam. In this study, the behavior of solid wood beams connections using plywood sheets as connecting elements and staples as mechanical fasteners were studied experimentally. The experimental results were compared with elastic analyses. Both beam and plywood were made of meranti (shorea). The staple type was MAX 1022J. This study was conducted on two specimens. The first specimen had two rows of staples on the front and back sides of the specimen. Each row consisted of ten staples making a total of 40 staples. The second one had three rows of staples on the front and back sides of the specimen. Each row consisted of ten staples making a total of 60 staples. From the tests, it can be concluded that each material in the connection, namely wood beam, plywood, and staples, failed. Failure mode of the wood beam was in the form of crack and tear. Failure mode of the plywood was the damage of the plywood directly contacted with the crown of the staples. Failure modes of the staples were flexural yielding. The differences between connection strength obtained from tests and elastic analyses were 8.18% for the first specimen and 0.65% for the second specimen, with the test results were higher than the elastic analyses results. It can be concluded that elastic analysis is quite accurate and conservative to estimate the strength of this type of connection, provided that the lateral resistance of connection with a staple is known.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925805008
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Risk assessment for forest fire in Brunei Darussalam
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 05033-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 05033-
    Abstract: The rise in global warming triggered by climate change and increased slush and burn activities particularly in Indonesia has been a major concern for deteriorating air pollution in Borneo regions in last two decades. Brunei Darussalam is facing increasing fire risk particularly during the dry season (February to April) of the year. The study is an effort to focus on the recent rise of fire events in Brunei Darussalam as fires can tremendously downgrade the quality of the country’s well-known forestry; affect the economy and most importantly, health of the people. Geographical Information System (GIS) have been widely used by researchers to study fire risk assessment. The ArcGIS software is used for Optimized Hot Spot Analysis, Inversed Distance Weighted (IDW), and Kriging to compare and analyse the data and prepare a map for identifications of hotspot areas. High temperatures due to the El Nino phenomenon and low precipitation contribute greatly to the forest fire outbreaks. Results show that the Brunei-Muara district is mostly affected compared to Tutong and Belait districts. From the hotspots identified, the percentages of forest areas affected are 53%, 64%, 25% in Brunei-Muara, Tutong and Belait districts respectively.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925805033
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Optimizing the prediction accuracy of load-settlement behavior of single pile using a self-learning data mining approach
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 02010-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 02010-
    Abstract: Pile foundations usually are used when the upper soil layers are soft clay and, hence, unable to support the structures’ loads. Piles are needed to carry these loads deep into the hard soil layer. Therefore, the safety and stability of pile-supported structures depends on the behavior of the piles. Additionally, an accurate prediction of the piles’ behavior is very important to ensure satisfactory performance of the structures. Although many methods in the literature estimate the settlement of the piles both theoretically and experimentally, methods for comprehensively predicting the load-settlement of piles are very limited. This study develops a new data mining approach called self-learning support vector machine (SL-SVM) to predict the load-settlement behavior of single piles. SL-SVM performance is investigated using 446 training data points and 53 test data points of cone penetration test (CPT) data obtained from the previous literature. The actual prediction accuracy is then compared to other prediction methods using three statistical measurements, including mean absolute error (MAE), coefficient of correlation (R), and root mean square error (RMSE). The obtained results show that SL-SVM achieves better accuracy than does LS-SVM and BPNN. This confirms the capability of the proposed data mining method to model the accurate load-settlement behavior of single piles through CPT data. The paper proposes beneficial insights for geotechnical engineers involved in estimating pile behavior.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925802010
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Public tendering process for construction projects: problem identifications, analysis, and proposed solutions
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 02013-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 02013-
    Abstract: The current tendering process has vulnerabilities that can be exploited to negatively impact project delivery. There are many research papers that discussed the occurrences of these exploitations (i.e., funds embezzlement, fraud invoicing, etc.), but there has not been one that focused on the study of the tendering process itself, nor presented problem analysis and mitigation options. The aims of this research are to identify and analyze problems in every stage of public tendering process, then offer potential solutions to resolve or curb these problems. In addition to utilizing publicly available studies and interviews were used as starting point of problems identifications. Questionnaires were then distributed to tendering practitioners. Likert scale assessment and factor analysis were used to measure the questionnaires and analyze the data respectively, while proposed solutions were established from experts’ judgement.This study showed that there are 135 problems that occur during tendering process. The most common problem is the bidding system’s inability to provide a complete database of contractors with their personnel, past works and experiences, and performance evaluation. The limited human resources in both number and competency is another important issue to consider. Proposed solution to solve these issues are based on four pillars of reformation concept done by public procurement agency.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925802013
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Reinforced Concrete (RC) beam design application for android based on SNI 2847:2013 (CEMA)
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 02014-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 02014-
    Abstract: In Indonesia RC structures are widely used for high rise, low rise, shop offices, as well as residential buildings. In February 2018, the first author introduced an RC beam design application for Android [12] for two options. Option one is for calculating nominal moment ( Mn ) and nominal shear force ( Vn ) of the section when the beam dimensions ( b , h ) and reinforcements are known; option two is to calculate the number of reinforcements for Mn and Vn when the dimensions ( b , h ) are known. In this paper, the first author added option three, namely the optimization for the design of RC beams when the internal forces are known and the application calculates the most optimal dimensions ( b , h ) and reinforcements. The application developed is named Civil Engineering Mobile Application for Concrete Beams (CEMA) and is called C 2 . In CEMA the user can follow the step by step calculation and the results of the calculation are stored in a database. For option three of CEMA (optimization of RC beam sections), the application was validated by another method called Teaching-Learning-based Optimization (TLBO) method [10]. It is believed that CEMA which is based on SNI 2847:2013 can be useful for Indonesian structural engineers designing and supervising actual construction RC buildings.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925802014
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Analysis and experiments of the effect of reinforcement of wood beam using carbon fiber reinforced polymer against bending strength
    EDP Sciences ; 2019
    In:  MATEC Web of Conferences Vol. 258 ( 2019), p. 03002-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 258 ( 2019), p. 03002-
    Abstract: Flexural reinforcement on wood beams is intended to increase the maximum load capacity that can be supported by wood beams until they are collapse. One of the most widely used resilient reinforcements currently used is reinforcement using Carbon Fiber Reinforced Polymer (CFRP) which is a combination of high strength with light weight material. This reinforcement is intended for historical buildings that need more load capacity that can be supported due to changes in building function, or the increase of the load on the building. The purpose of this research is to know the effect of reinforcement of wood beams with CFRP and variation of length of reinforcement to flexible strength of wood beams, and beam behavior reinforced with CFRP due to loading. Structural beam testing using mahogany logs with cross sectional size 75x100mm 2 along 2 m consisting of 4 types of samples with each type consists of 2 pieces of sample. The first sample was a wood beams without reinforcement, the second sample was a wood beams with a reinforcing length of ¼ spans in the middle, a third sample was a wood beams with a reinforcing length ¾ spans in the middle, and a fourth sample was a wood beams with retrofitting along the length of the span. From the test it is found that the maximum load increase that can be supported by the sample with the length of reinforcement ¼ span, ¾ span, and along the span has increased the maximum load respectively that is 4.393%, 37.340%, and 48.323% compared to wood beams without reinforcement. The average damage occurring in samples with CFRP is debonding failure.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201925803002
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 2673602-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...