A reliable method for visibility analysis of tall buildings and skyline: a case study of tall buildings cluster in Jakarta

This research investigates how contingency is currently calculated in project budgets within the building industry. This is an important aspect to consider as a large proportion of construction projects are significantly over-budget. The study presents three non-simulation methods and one simulation method for calculating cost contingency following the results of a forthcoming journal paper. These methods are applied against a case study project in attempt to highlight the most reliable method, and to create a methodology that will be useful to the industry. This paper identifies that the traditional fixed percentage approach is not sufficient and suggests that this could be one of the main reasons why construction projects are over budget. While it is unclear which method is the most reliable, this study provides a focus for future research into reliability and utilisation of contingency methods in the building industry. The research demonstrates that current practice needs to change to reduce the large number of construction projects that run over budget.

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Performance-Based Earthquake Engineering in the U.S.: A Case Study for Tall Buildings Tall buildings Tall buildings Tall buildings Tall buildings

Performance-Based Seismic Engineering: Vision for an Earthquake Resilient Society - Geotechnical, Geological and Earthquake Engineering ◽

10.1007/978-94-017-8875-5_26 ◽

2014 ◽

pp. 385-399 ◽

Cited By ~ 1

Author(s):

Jack Moehle

Keyword(s):

Earthquake Engineering ◽

Tall Buildings ◽

Performance Based Earthquake Engineering ◽

The U.S

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Are camera traps a reliable method for estimating activity patterns? A case study comparing technologies for estimating brown hyaena activity curves

Remote Sensing in Ecology and Conservation ◽

10.1002/rse2.175 ◽

2020 ◽

Author(s):

Sarah Edwards ◽

Jenny Noack ◽

Louis Heyns ◽

Diethardt Rodenwoldt

Keyword(s):

Reliable Method ◽

Activity Patterns ◽

Camera Traps

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Case study using the Los Angeles tall buildings structural design council guidelines: 40-storey concrete core wall building

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.434 ◽

2007 ◽

Vol 16 (5) ◽

pp. 583-597 ◽

Cited By ~ 25

Author(s):

Atila Zekioglu ◽

Michael Willford ◽

Limin Jin ◽

Murat Melek

Keyword(s):

Los Angeles ◽

Structural Design ◽

Tall Buildings ◽

Concrete Core ◽

Design Council

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Visibility Analysis for Assembly Fixture Calibration Using Screen Space Transformation

Volume 3a: 8th Design for Manufacturing Conference ◽

10.1115/detc2003/dfm-48161 ◽

2003 ◽

Author(s):

Zhenyu Kong ◽

Wenzhen Huang ◽

Dariusz Ceglarek

Keyword(s):

Visibility Analysis ◽

Space Transformation ◽

Significant Burden ◽

New Type ◽

Quality Of Products ◽

Screen Space ◽

Calibration Time ◽

Assembly Fixture

In a number of manufacturing processes, tooling installation, calibration and maintenance guarantee the precision of fixtures and play important roles towards the overall quality of products. Recently a new type of measurement equipment called “laser tracker” was developed and utilized for assembly fixture calibration to shorten calibration time and improve the accuracy of the currently used theodolite systems. Though, the calibration of assembly fixture is critical for product quality, the calibration time creates significant burden for productivity of multi-station assembly processes. In order to shorten the calibration lead time, the number of necessary calibration setups which is determined by visibility analysis needs to be minimized. This paper presents a screen space transformation based visibility analysis that allows minimizing the number of setups. The screen space transformation is applied to transform the visibility problem from 3D to 2D space, consequently the visibility problem can be solved efficiently. A case study illustrates the procedure and verifies the validity of the proposed methodology.

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I-Girders Method Used to Support Existing Railway Operations During Highway Underpass Construction

2015 Joint Rail Conference ◽

10.1115/jrc2015-5651 ◽

2015 ◽

Author(s):

Chun-Hsing Ho ◽

Junyi Shan ◽

Feiyue Wang ◽

Yiyang Chen

Keyword(s):

Reliable Method ◽

Metropolitan Areas ◽

Construction Safety ◽

Construction Technology ◽

Bridge Structure ◽

Railway Operations

In metropolitan areas, when a highway underpass project is being planned to go beneath an existing railway corridor, there are a number of concerns that could have an impact on the project. For example, will the underpass construction impact the existing railway operations? How to maintain the construction safety in both rail and highway operations? This paper brings construction technology using I-girder systems to provide a solution for highway underpass projects constructing beneath the existing rail corridors. The I-girder systems have been proved as a reliable method for highway underpass construction without the interruption of railway operations. This type of I-girder systems has been widely used in several countries as a temporary “bridge” structure in support of dynamic rail movements during underpass construction. Depending on the spans of underpass structures, a contractor can decide the number of I-girder units to be assembled and installed on site. This paper describes the construction procedures of the I-girder systems installation and daily inspection processes. A case study is used to demonstrate the applicability of I-girder systems in ensuring underpass construction smoothly while maintaining existing railway operations in a safety manner. During the construction of underpass, the contractor encountered geotechnical issues that had a severe impact on the construction safety and the integrity of foundation. This paper further discusses strategies that were used to mitigate the potential building collapses and foundation failures. It is concluded the method of I-girder systems is capable of supporting railway dynamic movements during highway underpass construction.

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