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Therefore, when representing the stress element for point 𝐻, we use the x-z plane. describe compression, tension, shear and cracking in concrete as well as interaction with reinforcement. Note that all relevant (non zero) components lie in the x-z plane. Have you ever wondered how that bridge acts under compression or tension forces while youre driving above Or how your roof takes the loading giving you a s. In this case geometric non linear analysis has to be carried and an elastic catenary behaviour of the cable is considered.A 3D-stress element is a representation of the state of stress composed of six stress components: $\sigma_x, \sigma_y, \sigma_z, \tau_$ are positive, this is the 3D stress element:

More detailed analysis may require cable elements be m odelled. The model is checked if the stiffness of the truss is sufficient to resist the initial Dead load. Usage in Cable Bridges For preliminary design of the cable bridges we go for modelling of cables as equivalent truss elements. suspension and cable-stayed bridges, where in large deformation effects can not be neglected. It’s effective in case of cable bridges i.e. RESULTS Why is the pre-stress elastic deformation loss sometimes positive Relief in Elastic Deformation of member is reflected as positive Prestress elastic deformation losses includes elastic shortening losses, which are caused by subsequent loadings (self weight, live loads, creep, shrinkage, etc. General Usage Used for both cable bridges as well as for modelling struts and ties of general bridges. MIDAS Customer Online Support - Knowledge base - Q&A forum for midas Gen. Non linear behaviour, no superimposition When non linear behaviour of cable is considered, superimposition of load cases are ruled out and combined effect of loads has to be considered. Load Combinations Superimposition possible Linear combinations of load cases can be made to compare truss force results. Hence consideration of sag becomes important. Answer: Hi Sir Please note that the results for displacements is as per global coordinate system as highlighted in the image sent by you but in Soilworks for the pile element (defined as beam element), it is as per element coordinate system and hence ECS-x represents the vertical force as shown in the image below. If you assumed the direction of all forces correctly up front, you are going to get all positive numbers.

For the compression case, you call it a negative force, for the tension case, you call it a positive force, by convention. Sag is predominant Cable elements are inherently non linear and the stiffness changes with the load applied. If it points outward away from the joint or member, it is a tensile force. Main differences in these elements are as tabulated below: Feature Truss Element Cable Element Sag Effect No Sag Truss element, is linear in general and has constant stiffness. Truss element can resist both tension and compression, while a cable element can resist only tension.