Temat: lower load capacity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Badanie przyczyn pęknięć betonowych podpór mostu drogowego
The causes study of RC road bridge supports cracks
Autorzy:: Mordak, A.
Mańko, Z.
Powiązania:: https://bibliotekanauki.pl/articles/131533.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Komisja Inżynierii Budowlanej PAN Oddział w Katowicach
Tematy:: drogowy most sprężony
przyczółek mostowy
obniżenie nośności
road compressed bridge
bridgehead bridge
lower load capacity
Opis:: The paper presents the causes investigation of scratches and cracks, basic measurements and inspections of damaged abutments and piers of prestressed concrete road bridge. The bridge was built in 1976, and its actual load capacity is D-class according to the Polish Standard PN-85/S-10030 (150 kN). Two clear cracks running vertically from the upper to bottom surface of the top plate to the foundations were confirmed on the body of right-bank abutment and the first pier. A serious threat was made up by the failure of this object. The given occurred damage together with comprehensive analysis of its appearing can be important in other similar cases of supports damage, especially in the old bridge objects, for which their age often reaches more than 100 years.
Źródło:: Roczniki Inżynierii Budowlanej; 2016, 16; 41-48
1505-8425
Pojawia się w:: Roczniki Inżynierii Budowlanej
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Bearing capacity of rectangular footing on layered sand under inclined loading
Autorzy:: Panwar, V.
Dutta, R. K.
Powiązania:: https://bibliotekanauki.pl/articles/2055743.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: rectangular footing
inclined load
finite element analysis
bearing capacity
layered sand
thickness ratio
friction angle
friction angle of upper sand layers
friction angle of lower sand layers
load inclination
podstawa prostokątna
obciążenie pochyłe
analiza elementów skończonych
nośność podłoża
piaskowiec warstwowy
współczynnik proporcji
kąt tarcia
złoże piaskowe
nachylenie obciążenia
Opis:: Purpose: The study presents the numerical study to investigate the bearing capacity of the rectangular footing on layered sand (dense over loose) using ABAQUS software. Design/methodology/approach: Finite element analysis was used in this study to investigate the bearing capacity of the rectangular footing on layered sand and subjected to inclined load. The layered sand was having an upper layer of dense sand of varied thickness (0.25 W to 2.0 W) and lower layer was considered as loose sand of infinite thickness. The various parameters varied were friction angle of the upper dense (41° to 46°) and lower loose (31° to 36°) layer of sand and load inclination (0° to 45°), where W is the width of the rectangular footing. Findings: As the thickness ratio increased from 0.00 to 2.00, the bearing capacity increased with each load inclination. The highest and lowest bearing capacity was observed at a thickness ratio of 2.00 and 0.00 respectively. The bearing capacity decreased as the load inclination increased from 0° to 45°. The displacement contour shifted toward the centre of the footing and back toward the application of the load as the thickness ratio increased from 0.25 to 1.25 and 1.50 to 2.00, respectively. When the load inclination was increased from 0° to 30°, the bearing capacity was reduced by 54.12 % to 86.96%, and when the load inclination was 45°, the bearing capacity was reduced by 80.95 % to 95.39 %. The results of dimensionless bearing capacity compare favorably with literature with an average deviation of 13.84 %. As the load inclination was changed from 0° to 45°, the displacement contours and failure pattern shifted in the direction of load application, and the depth of influence of the displacement contours and failure pattern below the footing decreased, with the highest and lowest influence observed along the depth corresponding to 0° and 45°, respectively. The vertical settlement underneath the footing decreased as the load inclination increased, and at 45°, the vertical settlement was at its lowest. As the load inclination increased from 0° to 45°, the minimum and maximum extent of influence in the depth of the upper dense sand layer decreased, with the least and highest extent of influence in the range of 0.50 to 0.50 and 1.75 to 2.00 times the width of the rectangular footing, respectively, corresponding to a load inclination of 45° and 0°. Research limitations/implications: The results presented in this paper were based on the numerical study conducted on rectangular footing having length to width ratio of 1.5 and subjected to inclined load. However, further validation of the results presented in this paper, is recommended using experimental study conducted on similar size of rectangular footing. engineers designing rectangular footings subjected to inclined load and resting on layered (dense over loose) sand. Originality/value: No numerical study of the bearing capacity of the rectangular footing under inclined loading, especially on layered soil (dense sand over loose sand) as well as the effect of the thickness ratio and depth of the upper sand layer on displacement contours and failure pattern, has been published. Hence, an attempt was made in this article to investigate the same.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2021, 108, 2; 49--62
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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