Efficiency of pile groups in tension

1987 ◽  
Vol 24 (1) ◽  
pp. 149-153 ◽  
Author(s):  
Madhira R. Madhav
Keyword(s):  
Boundary Integral ◽  
Test Results ◽  
Full Scale Test ◽  
Pile Groups ◽  
Pile Capacity ◽  
Axial Capacity ◽  
Transmission Towers ◽  
Tall Structures ◽  
Scale Test ◽  
Soil Interface

Groups of piles provided to support tall structures such as transmission towers, chimneys, stacks, etc. are subjected to pullout forces. The uplift capacity of a single pile in clay or sand can be estimated rationally and reliably by methods available. In this note, the interaction between two identical piles in tension is studied by modelling the soil as a homogenous, linearly elastic medium and by using the boundary integral technique. The reduction in individual pile capacity due to the existence of another pile is quantified and found to depend on the spacing and length-to-diameter ratio of the pile, and the type of variation with depth of pile-soil interface strength. Efficiencies of typical pile groups are computed. The predictions compare well with model and full-scale test results. Key words: axial capacity, boundary element method, efficiency, groups, interaction, piles, uplift.

Predicting Roof Diaphragm and Endwall Stiffness From Full-Scale Test Results of a Metal-Clad, Post-Frame Building

1992 ◽  
Vol 35 (3) ◽  
pp. 977-985 ◽  
Author(s):  
K. G. Gebremedhin ◽  
J. A. Bartsch ◽  
M. C. Jorgensen
Keyword(s):  
Full Scale ◽  
Test Results ◽  
Full Scale Test ◽  
Frame Building ◽  
Scale Test

scholarly journals On the feasibility of watertight face-sealed window-wall interfaces

2019 ◽  
Vol 282 ◽  
pp. 02015
Author(s):  
Stéphanie Van Linden ◽  
Nathan Van Den Bossche
Keyword(s):  
Laboratory Experiments ◽  
Building Envelope ◽  
Water Infiltration ◽  
Test Results ◽  
Full Scale Test ◽  
Structural Insulated Panels ◽  
Building Components ◽  
Scale Test ◽  
Wood Frame ◽  
Frame Construction

Watertightness is still a major source of concern in the performance of the building envelope. Even very small deficiencies can cause a significant amount of water leakage which may result in structural degradation or malfunctioning of the insulation. The risk of water infiltration is highest at joints between different building components and in particular at the window-wall interface due to the complexity of these joints. This paper focuses on the performance of different solutions to ensure the watertightness of the window-wall interface, e.g. self-adhesive foils, liquid applied coatings, prefabricated frames, self-expanding sealing strips. The performance of these solutions is evaluated for different wall assemblies, i.e. ETICS, masonry, structural insulated panels and wood-frame construction. Laboratory experiments were conducted on a full-scale test setup with a window of 1,01 m high and 0,56 m wide. Test results showed that it is not evident to obtain watertight face-sealed window-wall interfaces without an additional airtight layer or drainage possibilities. Water ingress was often recorded at lower pressure differences.

Full-scale testing of draped nets for rock fall protection

2009 ◽  
Vol 46 (3) ◽  
pp. 306-317 ◽  
Author(s):  
Paola Bertolo ◽  
Claudio Oggeri ◽  
Daniele Peila
Keyword(s):  
Rock Slope ◽  
Test Procedure ◽  
Full Scale ◽  
Rock Fall ◽  
Test Results ◽  
Structural Components ◽  
Full Scale Test ◽  
Technical Standards ◽  
Scale Test ◽  
Fall Protection

The installation of draped meshes, metallic nets installed in such a way as to lie against the rock slope surface, is one of the most common ways to protect roads and infrastructure against the detachment of small rock elements in areas prone to rock fall. Despite their frequent and worldwide application, there are no universally recognized guidelines or technical standards to help engineers in their correct design, and no full-scale test results are available where the whole system, composed of several interacting structural components, is tested. In this paper, a full-scale test procedure, which is able to permit the evaluation of the global behaviour of a draped mesh, is described and the results of tests carried out on widely used meshes are presented and discussed.

scholarly journals Generalized Outlook on Marine Gas Turbine Hot Section Deterioration

1972 ◽  
Author(s):  
B. J. Rogus ◽  
E. P. Weinert
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Test Results ◽  
Full Scale Test ◽  
Design Engineers ◽  
Generalized Framework ◽  
Scale Test ◽  
Useful Life ◽  
Turbine Design ◽  
Replacement Time

Investigators have compared results of gas turbine hot section material rig tests to field experiences with identical materials. They proposed that such correlation would be useful for turbine design engineers. But gas turbine users, particularly in the marine field, need a guide to correlate the few reported hot section experiences and realistically project when parts should be replaced. It is suggested that most hot section materials in properly protected marine gas turbines have much lower deterioration rates than those predicted. After coatings on turbine nozzles and blades have been operationally removed, increasingly better predictions of replacement time are possible. Sample at-sea experiences and environmental full-scale test results are offered to illustrate some unity among isolated experiences within a generalized framework of gas turbine hot section deterioration. A method for predicting further useful life of hot parts is proposed. A procedure and tool for in-place nondestructive evaluating of hot section deterioration are offered with a guide for scheduling future maintenance sections.

scholarly journals Rutting Performance of Semi-Rigid Base Pavement in RIOHTrack and Laboratory Evaluation

2021 ◽  
Vol 7 ◽  
Author(s):  
Sheng Li ◽  
Mengmeng Fan ◽  
Lukai Xu ◽  
Wendi Tian ◽  
Huanan Yu ◽  
...  
Keyword(s):  
Dynamic Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixtures ◽  
Rigid Base ◽  
Test Results ◽  
Full Scale Test ◽  
Rutting Resistance ◽  
Test Track ◽  
Dynamic Modulus Test ◽  
Scale Test

Through a simple performance dynamic modulus test (SPT), standard rutting test, Hamburg rutting test, French rutting test and asphalt pavement analyzer rutting test, the rutting resistance of asphalt mixtures in the middle and lower courses of three semi-rigid base asphalt pavement of Beijing full-scale test track road in China was evaluated. The test results show that the rutting resistance of asphalt mixtures of the middle and lower courses can be greatly improved by using low-grade asphalt, especially 30# asphalt. The rutting resistance of SBS modified asphalt mixtures is also better. The SPT dynamic modulus test can indirectly characterize the rutting performance of the asphalt mixture. The rutting test results of a laser road detection vehicle and 3 m ruler show that the asphalt grade has a significant impact on the rutting performance of semi-rigid base asphalt pavement. Compared with 70# asphalt used in the middle and lower courses, the rutting resistance of the pavement structure can be improved by more than 20%. The result also show that the APA rutting test results can closely characterize the full-scale test track results, which is an optimal test method for evaluating the rutting performance of semi-rigid base asphalt pavement. The research results can provide a theoretical basis and reference for the rational design and rutting evaluation of semi-rigid base asphalt pavement.

UPTF experiment: a synopsis of full scale test results

1990 ◽  
Vol 122 (1-3) ◽  
pp. 219-234 ◽  
Author(s):  
P. Weiss ◽  
H. Watzinger ◽  
R. Hertlein
Keyword(s):  
Full Scale ◽  
Test Results ◽  
Full Scale Test ◽  
Scale Test
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