I just have a couple quick questions regarding the Area Edge Constraint command...
I have 4 adjacent shell elements arranged in a 2x2 pattern. Each shell element is auto-meshed into elements of various sizes, and the nodes along the original element boundaries do not coincide. I understand...
I have a situation where I'm analyzing a bridge bent that includes open-ended pipe piles driven through water. Would the water within the pile be included in the seismic mass of the structure? I'm inclined to say yes but can't find any explicit guidance on this matter. Note I'm considering...
Just have a quick couple questions regarding seismic analyses in SAP...
1) Do the RS analyses ignore hinge definitions and other nonlinear components needed for a pushover analysis? Or do I need to generate a separate model?
2) Similar to the last question, I have a few rigid links in my...
I am preparing to analyze an existing pile supported structure for earthquake loads. The structure is subject to ship impact loads, so there is an asymmetric pile layout with batter piles angled in one direction. It's been a while since I took my Structural Dynamics course, but I was wondering...
Question regarding the design process for shear stud connectors...
I'm designing an H-Pile to concrete cap connection using shear studs due to high tensile loads in the pile. My immediate thought process is to design the connection using a shear friction approach, with appropriate checks...
I need to detail a non-contact lap splice that exceeds the allowable ACI spacing of 6" (roughly 8-9"). Has anybody come across design guidance for such an issue?
Thanks in advance!
I'm setting up a pushover analysis for a bridge bent consisting of steel pipe piles and a concrete superstructure. The connection between the pipe and the bent will incorporate a reinforced concrete cage. I know there are some current studies being done on this, but is anyone aware of any...
In using conventional Boussinesq surcharge formulas, I'm finding that the formulas are erroneous in that there is no upper limit to the applicability. In other words, I could place a strip load surcharge half a mile away from a 50' high wall and still see appreciable lateral loads being imposed...
Just gearing up to study for the lateral component (bridge focus) of the SE exam this fall. I failed the morning component of test by two questions last year and I therefore intend to overprepare myself so I can put this godforsaken test behind me. My experience is in bridges and I'm therefore...
I'm looking at a ledger design for a residential deck where the contractor wants to connect via lag screws to the rim joist. The problem is that the house is sheathed on the exterior with 1-inch rigid insulation. Unless the contractor removes the insulation (not preferred), there will be an...
A friend of mine recently bought a house that has a stick framed hip roof over his deck, which is about 14'x20'. The roof does not look to be original to the house and obviously not designed/constructed to code, considering it is sagging significantly. It was probably constructed about 10-15...
I've heard that high strength (150 ksi) tie rods are not recommended in seismic zones as sheet pile anchors due to micro-cracking and ductility concerns. Can anyone verify this or provide a reference?
Thanks!
I'm trying to debate whether to obtain a masters of structural engineering or not and would appreciate anyone's advice, preferably on a senior level. I'm simply wondering if education means as much as experience? (Simply put, is a masters really a consideration after 15+ years on the job? I'm...
I don't have much background with seismic design and am attempting to begin the learning process through some reading. Will also be taking a graduate course in the fall, but am trying to get a head start. Could someone please comment/respond to my questions below?
1) I've read that buildings...
This post is similar to one that's currently going on but it doesn't answer what I need and I don't want to jack the thread.
Basically, I'm looking for a seismic design course to take that focuses on bridge structures, not buildings. It would preferably be online or a couple day short course...
Hello all,
I just finished writing a design program to output PM curves for square or circular cross-sections with the option of square or circular voids in the center. Aside from the standard square sections in the PCI Handbook, does anybody know where I could obtain interaction diagrams from...
I've created a structural model of a pile-supported bridge-type structure subjected to concentrated, cyclic lateral loads. The lateral load would be applied at a single pile bent and distributed to adjacent bents through the concrete deck. If I model the piles with lateral soil springs and an...
I am using SAP V14 Basic and am new to this particular program. The following is a hypothetical situation that is easier ot describe than my model but should address my question sufficiently.
Say I have a large circular pile cap supported on battered piles. The piles are spaced equally...
Is there any guidance on the maximum allowable amount of time that can elapse between consecutive pours in a monolithic structure? The purpose is to see if a cold-joint has formed after a significant delay between concrete trucks. The allotted time would obviously depend on the type of mix...
I've been asked to look at designing a concrete beam that varies in cross-sectional dimensions. Essentially it has a flat and level top surface while the bottom surface is a shallow arch which results in a reduced beam depth towards mid-span. Would this configuration be analyzed as a simply...
