Analysis of some effects caused by interaction between bulk solid and r.c. silo wall structure

Łapko, A.; Gnatowski, Marek; Prusiel, J. A.

doi:10.1016/s0032-5910(03)00095-0

Cited by 13 publications

(8 citation statements)

References 3 publications

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“…The experimental relationship obtained here in the formulation (for wheat) in the direct shear apparatus is presented in Fig. 2 (Lapko et al 2003). For the needs of numerical analysis of the interaction effects between silo wall structure and bulk solid, the nonlinear approach proposed by Duncan and Chang, 1970 as been here adopted.…”

Section: Response the Cylindrical Elevated Wheat Storage Silos To Seimentioning

confidence: 99%

Response the Cylindrical Elevated Wheat Storage Silos to Seismic Loading

Abd-el-rahim¹

2014

IOSRJEN

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The elevated cylindrical storage silos are lifeline structures and strategically very important, since they have vital use in industries. Silos are special structures subjected to many different unconventional loading conditions, which result in unusual failure modes. In addition silos are cantilever structures with the material stacked up very high vertically. The earthquake response of silo structures for the storage of bulk solids differs for elevated silos and silos supported directly on the ground. The walls of different type of silos are subject to earthquake loads from the stored mass, and these may substantially exceed the pressures from filling and discharge. The assessment of horizontal action of ensiled material due to seismic vent seems to be particular interest. This paper is concerned with the earthquake response of these structures, which has received little attention to date. A cylindrical silo wall and bulk solid is modeled by three dimensional finite solid l elements. The interaction effect between the silo wall and bulk solid is taking account by using the nonlinear approach proposed by Duncan and Chang. A then interface layer proposed by Desia is applied to describe the phenomena taking place on the surface between the granular material and silo wall. Coulomb's friction low was used for modeling of wall friction. An incremental iterative finite element technique is applied for dynamic analysis of wheat silos using SAP2000 structural software package. In this research seven reinforced concrete silo models with different height to diameter ratios were studied and analyzed in time history by using earthquake acceleration 0.5g applied to silos models. The resulting finite element silo pressures as the silo is full with and without earthquake excitation are compared with theoretical filling and discharging pressure. The result obtained revealed that the elevated silos response is highly influenced by the earthquake characteristics and is depending on the height to diameter ratio. Also the findings indicate that the squat silo (large diameter and height) are more resistance to the earthquake and more economical. The seismic responses of the elevated wheat silo such as top displacement, normal forces, shearing forces and bending moments in silo support have been assessed for earthquake records.

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Section: Response the Cylindrical Elevated Wheat Storage Silos To Seimentioning

confidence: 99%

Response the Cylindrical Elevated Wheat Storage Silos to Seismic Loading

Abd-el-rahim¹

2014

IOSRJEN

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show abstract

“…The experimental relationship obtained here in the formulation (for wheat) in the direct shear apparatus is presented in Fig. 2 (Lapko et al 2003) [25]. For the needs of numerical analysis of the interaction effects between silo wall structure and bulk solid, the nonlinear approach proposed by Duncan and Chang, 1970 [5] has been here adopted.…”

Section: Modeling Of Granular Materialsmentioning

confidence: 99%

Response of Cylindrical Elevated Wheat Storage Silos to Seismic Loading

el-Rahim

Hamdy²

2013

JES. Journal of Engineering Sciences

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The elevated cylindrical storage silos are lifeline structures and strategically very important, since they have vital use in industries. Silos are special structures subjected to many different unconventional loading conditions, which result in unusual failure modes. In addition silos are cantilever structures with the material stacked up very high vertically. The earthquake response of silo structures for the storage of bulk solids differs for elevated silos and silos supported directly on the ground. The walls of different type of silos are subject to earthquake loads from the stored mass, and these may substantially exceed the pressures from filling and discharge. The assessment of horizontal action of ensiled material due to seismic vent seems to be particular interest. This paper is concerned with the earthquake response of these structures, which has received little attention to date. A cylindrical silo wall and bulk solid is modeled by three dimensional finite solid elements. The interaction effect between the silo wall and bulk solid is taking account by using the nonlinear approach proposed by Duncan and Chang [5]. A then interface layer proposed by Desia [4] is applied to describe the phenomena taking place on the surface between the granular material and silo wall. Coulomb's friction low was used for modeling of wall friction. An incremental iterative finite element technique is applied for dynamic analysis of wheat silos using SAP2000 structural software package [3]. In this research seven reinforced concrete silo models with different height to diameter ratios were studied and analyzed in time history by using earthquake acceleration 0.5g applied to silos models. The resulting finite element silo pressures as the silo is full with and without earthquake excitation are compared with theoretical filling and discharging pressure. The result obtained revealed that the elevated silos response is highly influenced by the earthquake characteristics and is depending on the height to diameter ratio. Also the findings indicate that the squat silos (large diameter to height ratio) are more resistance to the earthquake and more economical. The seismic responses of the elevated wheat silo such as top displacement, normal forces, shearing forces and bending moments in silo support have been assessed for earthquake records.

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“…The results showed that the hoop force generated by the temperature difference of the silo was 6 ∼ 8 % of the maximum static pressure imposed by the stored material. More recently, based on the temperature field that measured experimentally, Lapko et al [21,22] investigated the hoop thermal stresses and bending moments in reinforced concrete silo battery subjected to grain pressure and thermal gradient with numerical FEM. Chen et al [23] concluded that the hoop thermal stress caused by temperature difference was around 55 % of that imposed by the coal load.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Non-Uniform Temperature Distribution of Large-Diameter Concrete Silos under Solar Radiation

Zhao

Yang

Wang

2018

Mathematical Problems in Engineering

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There is a growing demand for silos with large diameters and volumes; hence, the stresses induced by the temperature differences between the inner and the outer surfaces of the concrete walls of the large silos become significant. Sunshine is the main source of the temperature differences; and it is necessary to investigate the influences of sunshine on large concrete silos and ensure their safety and durability. In this paper, the temperature distribution of a concrete silo exposed to the sunshine was measured on site. A finite element (FE) model was built to analyze the temperature distribution under the sunshine, and the FE model was validated by comparing the yielded temperature field with that obtained on site. Based on the temperature field yielded in the FE model, the internal forces of the silo were determined by performing a structural analysis. After that, the FE model was extended and used for a parametrical study, and the influences induced by the factors like meteorological parameters, dimension of silos, and reference temperature on the temperature effects of the silo were investigated. The simulation results showed that the temperature gradient exhibited significant nonlinearities along the wall thickness. The performance of a steady-state analytical method was evaluated, which is conventionally used for the design of silos. It was found that, for the silos with the thicknesses of more than 30 centimeters, the steady-state method overestimated the temperature effects. It is suggested here that nonlinear temperature gradients should be employed for considering the temperature effects of large silos.

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Analysis of some effects caused by interaction between bulk solid and r.c. silo wall structure

Cited by 13 publications

References 3 publications

Response the Cylindrical Elevated Wheat Storage Silos to Seismic Loading

Response the Cylindrical Elevated Wheat Storage Silos to Seismic Loading

Response of Cylindrical Elevated Wheat Storage Silos to Seismic Loading

Investigation on the Non-Uniform Temperature Distribution of Large-Diameter Concrete Silos under Solar Radiation

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