I have beam 1) for which I have checked the loads. Ive been told I need to control for the moment and shear from beam 2) onto beam 1) aswell. I dont understand how this works, how does the shear and moment from beam 2) affect beam 1)?
This is how the beams 1 and 3 look, they're supposed to...
I know what shear is, I know what tension and compression is, but I dont understand what shear compression and shear tension means? Is this simply when shear causes either compression or tension in the member?
Example of shear tension?
Example of shear compression?
I have a symmetric bridge deck about the red line, except that one side has slightly higher stiffness at the end. If I were to place loads on only one side, where would it be more conservative to place, the side with higher or lower stiffness? Supports are along the yellow dotted line.
This is a bridge with five different lanes (Sidewalk, Driving lane, Driving lane, Bike lane and sidewalk).
This is how my beam element model looks, each beam in the longitudinal direction (x-direction) represents a lane. Supports are all roller supports.
The loads I have that can be on or...
I have made the structure below with beam elements; the transverse beams (In the Y-direction) does not have all the properties defined and is only supposed to carry loads between the longitudinal beams (In the X-direction). The structure is supported by rollers, and I want to find out if the...
I have three section properties given per meter length as seen below which I need to define a beam element with:
Transverse bending stiffness [m^4/m]
Torsion stiffness [m^4/m]
Transverse shear stiffness [m^2/m]
I can multiply with a certain length to remove the per meter, but after that, where...
I am reading a text about bridge cross section and lever arm. The lever arm is mentioned in relation to calculation of section properties of the bridge. I was wondering if having a big lever arm in the cross-section (generally speaking) is good or bad? Is it conservative to assume a small lever arm?
I am reading a report about a multicellular deck bridge and they talk about points of contraflexure, and they say members should be spaced closer than 1/4 of the points of contraflexure which I dont understand?
The bridge has 3 spans as seen below (L1, L2, L3), the middle one has a length of...
I have a bunch of data as seen below, the data continues on with A4, A5.....N10 etc. The equations Ive made use the cells 72D, 73D, 74D... 72H...74L. I dont want to have to move the equation cells each time when I get to A2, A3....N10 etc. I was thinking of using the Data in A1, delete it, then...
I have a surface which has different types of equipment on top of it which is not modelled. Nonetheless I want to apply the total load from these (P) on the surface by applying it to the reference point. I was wondering if it would be best to use kinematic, continuum or structural distributing...
I create tie constraint between the top surface of a solid elements structure, and reference point to which we apply a concentrated load. I want this concentrated load to be spread out over the surface:
When I run the job I get the error: "Too many attempts made for this increment Job XXX...
I am thinking between concrete foundation - rubber bricks, and rubber bricks - ground floor. The rotating machinery causing dynamic loads on top of the concrete foundation will not be modelled, only the loads from here will be applied to the concrete foundation.
How should I constrain these...
Ive been given an Abaqus CAE model someone else made from 2019, when I start to work at it on my Abaqus 2022 I need to unlock the assembly, but once I unlock it, it needs to regenerate but it fails to do so properly and some partition lines dissappear and I get a warning about constraints etc...
Rotating mass. The structure will have rotating masses attached to it.
Rounds per minute (RPM). They say critical RPM is 6000 for object attached to a structure, when the machine starts there are some critical oscillations (?) and we need to accelerate past this RPM to avoid damage.
When I want the highest amount of shear force tau_max I use 3/2 x V/A as seen below:
However I saw someone use 8/7 x V/A. I was wondering if anyone has seen this equation before where they use 8/7 instead of 3/2, is it a special case?
I have two shell models where each has varying thickness connected with a tie constraint. I have temperature loads in my model, and when I run my model I get the following error for the nodes on one of the parts (XXX-1):
"Error in job XXX: NO TEMPERATURE DEGREE OF FREEDOM EXISTS ON NODE 31...
There are two shell models on top of each other in the Assembly which are constrained with a tie. Then an interaction has been defined for several steps, and as I understand it "propogated" means the interaction in the last step will come over to this step aswell, but what does "built into base...
The text for the figure says MDOF (Multiple Degrees of Freedom)system and associated mode shapes; I fail to see the relation between mode shapes and degrees of freedom, is it so that a degree of freedom = a mode shape? So in the figure below we will have "n" amount of degrees of freedom and mode...
