I am having difficulties understanding the calculation of the weight span for spans subjected to wind loading in overhead power lines. Do I still have to consider the lowest point to define the weight span, or do I have to consider the lowest point of the catenary in the coordinate system of the...
Dear all,
I came across a document mentioning the "Grenoble Method" for pile uplift verifications. I need to understand the method because we were asked to used it in one of our projects for guyed mast foundations. However, I found very limited information online, and a vague reference to an...
Hi, I am designing a reinforced concrete building with a steel flat roof. From my calculations, it seems beneficial for this building to have a diaphragm at roof level, but here is the question: is it feasible to design a steel roof as a diaphragm? Usually, due to temperature or other factors, I...
I am retrofitting an existing building that is composed of highly irregular independent blocks. If I merge some blocks together (eliminating some of the joints), the structure becomes quite regular in plan. The joints are spaced at roughly 30m. The question is, what should I have in mind while...
I am trying to retrofit an existing 4 story reinforced concrete building with a typical plan as shown below. The thing is, it has a very long wall on one side, retaining the soil behind, and a very flexible structure over the rest of the floor plan. When I tried to balance the stiffness of the...
Would you design the connection below assuming the concrete member width is b1, b2, b3 or something else (see figure below for explanation)? I couldn't find a direct reference in the codes about this situation. I am assuming b1 is overly conservative, considering that the concrete cones can...
Dear all, I am a structural engineer, and the electrical engineer gave me the short circuit forces to be applied to the gantry structure. The trouble is that I can't seem to find any reference in the European norms about the consideration of these loads for my strucutral design. Do I consider...
Hi, what apps do you use to design base plates for steel structures? Is there something you recommend? Any free tool available? I have been using several, but I find all of them limited to some extend. For instance:
1) Autodesk Robot Structural Analysis: I cannot specify additional...
The literature seems unclear on this one. In the picture below, every other purlin is attached to the bracing system. Do I consider the top chord critical length 2L in this case or 1L (L being the distance between two nodes)?
Hi,
Do you know any good apps, books and papers dealing with the design of nonconventional steel to concrete connections? By "non conventional" I mean connections that are not currently handled by programs such as Hilti Profis Engineering or Peikko Designer. Two examples I face very commonly...
I am trying to model a reinforced concrete wall in Sap2000 with nonlinear layered shells. I know for a fact that the behavior of this wall is governed by shear, because it failed during a recent earthquake and the failure mode is clearly a shear failure. Is the nonlinear layered shell model...
I have a horizontal canopy attached to a building, as shown in the figure below. The canopy does not have any cladding except for some timber joists. The idea of this canopy is to create some shadow, nothing more. The solid area divided by the total area of the canopy is about 0.4 (taking into...
Hi,
due to the limited space, I often find myself wondering whether I could use bolts in shear (bolts 1 in the figure) in conjunction with concrete in compression (perhaps with bolts no. 2 to hold the shear force). In these cases, I find it hard to find the forces in the bolts with confidence...
How do you understand the following provision in EN 50341-1 (2012) regarding wind loading applied to members of a lattice tower?
Does it mean that the following figure is correct? Consider the wind blowing along the X-axis. Any thoughts on this?
Is it possible to calculate the cable support reactions (or the cable tension) given only:
- the weight of the cable per unit length;
- the ruling span;
- the wind span;
- the weight span?
My understanding is that there is an infinite number of solutions for this problem depending on the...
