Recent content by Ahmad Uzair Arshad

Thank you But unfortunately my structure is primarily concrete. I just want to use steel plate in some walls that are failing in shear.

Sure, The steel plate will be embedded, and shear studs will be used to transfer forces. I am looking for a design guide / example to understand the design parameter & requirements. Also is there any ACI report or guide for such composite design?

Hi Dear, I am working on a new project that requires reinforced concrete walls as shear wall. Due to space constraints, I cannot increase the thickness of the walls. Currently the walls are failing in shear. it's an underground structure with extreme ground shock loads. The PMM ratio of wall...

Hi Guys, I want to learn how to design shallow buried shelter. the shelter shall be protected against chemical, biological, radiological, Nuclear & explosives. Is there a good handbook/guide/book with examples for such kind of structures. I am particularly interested in the effect of earth...

hey guys, As you know, laying out trusses for a complex roof is a pain. I know there are some software that are capable to generate truss layouts such as truss4 & AGACAD etc, but almost all are paid. Is there any free software for the same work?

Crack inclination signals a Shear crack. Flexural cracking would be more vertical at Top & Bottom extremes.

ACI 117-10 Specification for Tolerances for Concrete Construction and Materials. Deals with the allowable tolerances during construction. BTW How can I change my discipline from CIVL/Environmental to Structural. Thank you

Hello Structural Engineers, I am working on the retrofit of column & Footing. The current load capacity of column is 1900 Kips (24" x 36" with 14-dia 1" bars) & an increase of 500 kip is required. A jacket thickness of 6" is required at all sides. I just don't know how to calculate the Shear...

Op is writing my words. Cant you help you as I am figuring myself how to balance these emotions. Fazlur rehman once said, The technical man must not be lost in his own technology. He must be able to appreciate life, and life is art, drama, music, and most importantly, people. Seems like he...

I am not an expert. In my opinion tilt is worse than sinking. Tilt will not only increase the pressure on one side of the footing but also increases secondary moments on structural members due to P-Delta effects. What if they just balance the tilt by increasing pressure on the opposite side or...

JoshPlumSE- This is exactly the issue, while designing without stiff members the reinforcement requirement is for Grid E, for which an extra layer of bars was placed, this extra layer was curtailed according to its development, since the max moment has now shifted from Grid E to F, therefor...

ProgrammingPE All the columns are included, but column stiff element is assigned to only 4 columns, 2 on grid E & 2 on grid F respectively. There is a 6'-0" corridor between these grids. This kind behavior is only seen in these columns when I apply stiff element to columns of other grids. The...

Hi Fellow Engineers, I was designing a raft for a mid rise 17 story residential tower, It was in my knowledge that Modelling Stiff element under column decreases the max moment because of decrease in clear span. Even CSI knowledge base acknowledge that modelling of stiff element is a non...

Thank you. I get it now, the water load will be considered in base shear calculation & tanks walls will be design for dynamic pressures of the water.

dynamic pressure meaning total pressure water is exerting in the dynamic state (convective + impulsive) combined using SRSS as defined in ACI 350. the structure is a 100 ft high concrete water supply tank. with horizontal bracings at 15' intervals. bottom two-story may be used as office floors...