A barge carrying 700 Tons of added weight (7 motors) plus its own weight is to be anchored using driven steel pipes (piles), (48” diameter, 5/16” thick) that run 34 meters deep into the sea bed. The barge is to have free vertical movement while its lateral movement is to be transferred to the...
A barge carrying 700 Tons of added weight (7 motors) plus its own weight is to be anchored using driven steel pipes (piles), (48” diameter, 5/16” thick) that run 34 meters deep into the sea bed. The barge is to have free vertical movement while its lateral movement is to be transferred to the...
I have a continuous reinforced concrete beam. An 8" Diameter opening was placed in the beam long after it was placed. The location of the opening is at 1/8 of the clear span of the beam. The design called for #4 @ 4" o.c. in that region. One has to assume then that the opening cut through (3)...
I have a concrete cantilever beam (See Elevation Below). The concrete cantilever will support a new steel beam (a new point load at its tip). The existing moment strength of the beam is that corresponding to 4#8's at the top, which is insufficient for the new load condition. I have thought of...
I have the following questions about ETABS:
1. Does it automatically include accidental torsion (5% of the plan dimension) or do I need to input this value myself? I have an illustrative model where the C.M. and C.R. coincide, and it shows no torsional effects for lateral loads.
2. Does it...
I have a 7 story concrete building. For lateral design, the structure is composed of a dual system with special moment frames with special reinforced concrete shear walls. The moment frames must be capable of resisting at least 25% of prescribed seismic forces. In ETABS I should model my...
I am trying to increase the cross sectional area of a concrete column by increasing its diameter from 0.90M. to 1.20M. The current column has a diameter of 0.90M. and a second pour of 0.30M. around the column is to be made. The additional longitudinal steel and stirrups are to be located in the...
I have an interior 8" thick cmu wall used only for division purposes (non load bearing). The wall spans 5.80m. (between the top of concrete slab below to bottom of concrete slab above). It is connected to the concrete slab below with dowels.
For pressure out of plane I considered the following...
Steel walkway spans between to portions of a concrete structure which I want to act indpendently of one another for lateral loads. The connection attached below is a regular shear connection. I need a connection that provides gravity restraint but that would allow movement in the direction...
I am designing the slab for a water fountain (See attached elvation). The diameter is 7m. I would appreciate any help determining what the best way of designing it might be. Can I model it as a shell element in SAP2000?, can I treat in some way as a retaining structure?
Thanks in advance for...
I have the following ETABS model. I am having problems eliminating the load combinations that include wind load as a DOWNWARD load:
1.2D + 1.6L + 0.80W
1.2D + 1.6W + 0.50Lr
0.90D + 1.6W
I have tried Design/Steel Frame/Select Design Combos, but even though I remove the combos from the list when...
I have a situation where I modeled my first floor in ETABS and modelled my second floor in another ETABS file.
What would be the best way to incorporate the two?
I have the following curved reinforced concrete slab supported on three sides (See attached). I am trying to find a way to design the slab without being overly conservative. What would be the best way to design it?
Thanks for your help.
For the design of concrete beams as part of a concrete frame in ETABS, when the combination of Torsion and Shear Force is exceeded the following message appears:
O/S #45 "Shear Stress due to Shear Force and Torsion Exceeds Maximum Allowed".
However, ETABS is evaluating this at the face of the...
I'm designing a five story parking structure using double T's supported on precast inverted T and L beams. I have modelled the ramps on ETABS as a membrane element with one way load distribution and have meshed it into 1x1 elements. The load it appears is transferred correctly to the supporting...
A roof framing plan specificies 16K 202/112 Joists. The designation I am accustomed to seeing is for example 16K2 joists. I imagine the numbers 202/112 refer to the allowable loads, but why two numbers? What does each really mean? What correlation is there between both types of designations...
A column part of a special reinforced concrete column is supported at the top by a two way concrete waffle slab with special reinforced concrete beams on both directions, and at the bottom by a two way concrete slab consisting of ordinary reinforced concrete frames (since in that floor special...
I have a situation where I have a steel beam over a concrete column. The attached sketch shows the connection. I am trying to make it a moment connection at the top, however my moments are quite large. I was wondering about the possibility of it not being a moment connection. I would really...
Please see attached typical detail below.
My question is the following.
Is the idea in terms of the support of the beam, for its bearing area to be that of the precast beam supported on the corbel, or is the corbel just to support the beam until the cast-in-place closure is poured?
If that...
I'm designing a concrete slab over metal deck in which neither the steel beams nor the steel deck are composite with the slab (deck is used as a form). The total thickness of the slab is 6", (2" flute + 4" slab). The span is 8'-6" and the equipment load is 1.00 Ton/m^2. I am thinking of...
