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Design criteria for structural design of silage silo walls

Von Wachenfelt, Hans and Nilsson, Christer and Östergaard, Göran and Olofsson, Anders and Karlsson, Marie (2014). Design criteria for structural design of silage silo walls. Biosystems engineering. 126, 92-103
[Journal article] (Unpublished)

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Official URL: http://dx.doi.org/10.1016/j.biosystemseng.2014.07....

Abstract

Existing Swedish design guidelines (JBR) cover silo wall heights up to about 3 m. These guidelines presumably overestimate the forces and pressures exerted by silage juice when silo walls are more than 3 m high, which could result in over-sizing, material waste and increased capital costs. This study determined silage physical properties in terms of horizontal wall pressure and evaluated silage juice levels in silos with a wall height of 3 m or more.Wall pressure was measured by transducers mounted on a steel ladder rack placed vertically along the internal silo wall. The ladder rack also permitted measurement of silage juice levels in slotted steel pipes. The pressure on the transducers was recorded by a data acquisition system displaying static and total loads (pressures imposed by silage material without and with the compaction machine, respectively).The static pressure at the bottom of the silo wall (4 m) was 16 kPa during filling and compaction, and 22 kPa 1-4 months after filling. The silage juice did not interact with compaction. The wall pressure increased by 30% after filling, but the increase was only significant at 1 m from the silo bottom. The dynamic load was 17 kPa when the compaction machine passed 0.1 m from the silo wall.New guidelines are proposed based on the results and on the Eurocode for ultimate limit states (ULS) for two stages; filling and the utility period. The design bending moment for ULS was 21% lower than specified in JBR. (C) 2014 IAgrE. Published by Elsevier Ltd. All rights reserved.

Authors/Creators:Von Wachenfelt, Hans and Nilsson, Christer and Östergaard, Göran and Olofsson, Anders and Karlsson, Marie
Title:Design criteria for structural design of silage silo walls
Series/Journal:Biosystems engineering (1537-5110)
Year of publishing :2014
Volume:126
Page range:92-103
Number of Pages:12
Publisher:Elsevier
Associated Programs and Other Stakeholders:SLU - Environmental assessment > Programme Built Environment
ISSN:1537-5110
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:N Machinery and buildings > N01 Agricultural engineering
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Agrovoc terms:horizontal silos, silage
Keywords:Bunker silo, Wall, Silage, Pressure, Force
URN:NBN:urn:nbn:se:slu:epsilon-e-2604
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2604
Additional ID:
Type of IDID
Web of Science (WoS)000342478900009
ID Code:11841
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Biosystems and Technology (from 130101)
(VH) > Department of Biosystems and Technology (from 130101)
Deposited By: SLUpub Connector
Deposited On:29 Apr 2015 12:05
Metadata Last Modified:04 Mar 2016 14:19

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