Stability of Double-Hinged Nonlinear Masonry Members under Combined Load

Offshore wind turbine (OWT) receive a combined vertical-horizontal- moment load by wind, waves, and the structure’s own weight. In this study, the bearing capacity for the combined load of the suction foundation of OWT installed on the sandy soil was calculated by finite element analysis. In addition, the stress state of the soil around the suction foundation was analyzed in detail under the condition that a combined load was applied. Based on the results of the analyses, new equations are proposed to calculate the horizontal and moment bearing capacities as well as to define the capacity envelopes under general combined loads.

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Probabilistic Analysis of the Combined Slamming and Wave-Induced Responses

Journal of Ship Research ◽

10.5957/jsr.1985.29.3.170 ◽

1985 ◽

Vol 29 (03) ◽

pp. 170-188

Author(s):

G. Ferro ◽

A. E. Mansour

Keyword(s):

Sensitivity Analysis ◽

Stochastic Modeling ◽

Structural Design ◽

Arrival Time ◽

Extreme Value ◽

Induced Responses ◽

Combined Load ◽

Random Intensity ◽

Important Input ◽

Wave Induced

The success of implementing reliability analysis in structural design depends to a large extent on the ability to combine the loads acting on the structure, and on extrapolating their magnitudes to obtain the extreme value of the total combined load. In this paper, a new theory is proposed to combine the slamming and wave-induced responses of a ship moving in irregular seas. The slamming and wave-induced responses are both considered as stochastic processes, and the properties of the combined response are determined on that basis. The slamming loads alone are considered as a train of impulses of random intensity and random arrival time as has been shown by Mansour and Lozow [1],3 but the dependence between the intensity and arrival time is considered in the stochastic modeling. The extreme value of the combined response is then investigated for use in design applications. An example of application to a cargo ship is given and a sensitivity analysis is conducted to determine how sensitive the results are to some of the important input parameters.

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On the response and prediction of multi-layered flexible riser under combined load conditions

Engineering Computations ◽

10.1108/ec-10-2018-0493 ◽

2019 ◽

Vol 36 (8) ◽

pp. 2507-2529 ◽

Cited By ~ 1

Author(s):

Mengsha Liu ◽

J.Y. Li ◽

Lixin Chen ◽

J.S. Ju

Keyword(s):

Numerical Simulation ◽

Internal Pressure ◽

Internal Force ◽

External Pressure ◽

Prediction Methods ◽

Flexible Riser ◽

Content Type ◽

Combined Load ◽

Simulation Results ◽

Load Conditions

Purpose The internal force is more complicated in a combined load case than in a single load case, and the influence of the combined load on the stress cannot be neglected. The purpose of this paper is to study the mechanical behavior of the flexible riser under combined load conditions of tension and internal pressure or external pressure. Design/methodology/approach The mechanical behavior of the flexible riser under combined load conditions is studied by numerical simulation with a nine-layer detailed finite element model. The layers of flexible riser are modeled separately, and the interactions between layers have been taken into consideration in numerical simulation. Findings Under tension and internal pressure or external pressure, the pressure armor will bear extra external pressure because of the squeezing actions between layers caused by tension, and the extra external pressure will increase proportionately with the increase of the tension. Under internal pressure and tension, the internal stress for tension armor was nearly unchanged compared to that under unique tension load, whereas under external pressure and tension, the change of internal stress for tension armor was significant. Prediction methods of internal force for pressure armor and tension armor under pressure and tension are given, and the result from the formula agrees well with the simulation results. Originality/value The prediction methods on the internal force of flexible riser proposed in this study are proven accurate, with numerical simulation results, and the prediction methods are convenient for engineering applications.

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Study on Spatial Mechanical Characteristic of High-Speed Railway Ballastless Slab Track on Subgrade

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.503-504.1010 ◽

2012 ◽

Vol 503-504 ◽

pp. 1010-1015 ◽

Cited By ~ 1

Author(s):

Qing Yuan Xu ◽

Bin Li

Keyword(s):

Temperature Gradient ◽

Mechanical Characteristic ◽

High Speed ◽

Three Dimensional ◽

Calculation Model ◽

Slab Track ◽

Combined Load ◽

Railway Line ◽

Spring Element ◽

Ballastless Track

By using beam element to model rail, spring element to model fastener, solid element to model different components of ballastless track, contact element to model the connection between each component of ballastless track, a statics three-dimensional nonlinear finite element mechanical model for calculating the forces transmission among rail, fastening and different component of ballastless slab track on subgrade was established. Experimental data of Suining-Chongqing railway line was given to validate the calculation model. Force of ballastless slab track on subgrade under gravity load, train load, uneven settlement load, temperature gradient load as well as combined load was analyzed. Results show that: spatial forces characteristic of ballastless slab track is very notable under train load; uneven settlement load as well as temperature gradient load has significant influence on the mechanical characteristic of ballastless slab track; force of ballastless slab track increases significantly under combined load than that of under any single load.

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