Eko Juwanto

hi everyone, kindly please to advice me i have a multi tower buildings with a common podium at base, refer to attached picture how to do seismic analysis for that building? i've modeling in etabs with multi tower function and then assign diaphragm per tower. what do next? i'm confuse in how to calculate the eccentricity for accidental torsion, there is e+5% of the widest structure, whether for tower the widest is per tower or still count by the podium. if per tower, for tower not in primary axis, the wide is count from tower or podium axis? do you have any reference about multi tower seismic analysis? and regarding wind load, what the practice way tu assign the wind load if using etabs? extended from the diaphragms? or manually calculate and assign to perimeter column? i'm very appreciate if someone could advice me

thanks sir, would you please to tell me how to put the load? i've modeling the slab in SAFE then i assign the area spring, and put the surface load, due to uniform load and i get 0 moment i think i'm wrong in assign the load, i wonder if someone would explain it how to analyse slab on grade using SAFE, i've read the ACI 360, but still not to understand. Thanks

anyone please advice how to design slab rest on grade? anyone have a referen? i have analyse with SAFE, but i still not confirm with the value of k (subgrade modulus) and the load. that the load assign full on the slab or just partial load at the critical location? thanks

Why do effective width method is used to calculate, the Maximun live load shear force in the design of interior panel of Slab of a T-beam RCC bridge?

hi everyone, have anyone got a similar problem like below? I've modeling a concrete buulding with slab as membrane the frame I've modeling per part, but the bending moment still like 1 long beam with 2 end support Thanks

noted and very thanks all

sir, would you please to provide a technical reason? greater than 3 is according to IS standard or? what will happend if I model it with column? Thanks

for simply work purpose, in slab reinforcement we usually put top rebar same as bottom rebar

Good evening, here I have a double reinforced element (slab or beam) if I put the As equal to As', whether the concrete compressive force are neglected or have another for formula in case of A Tension equal to As compression Mn = (As-As')Fy(d-a/2) + As'.Fy (d-d') since As = As', its only left As' Fy (d-d') the concrete is to be ignored?

Good evening, 1 have a building with all column 2.5m long and 0.5m width, its better to take it as a Shear wall or as a column? and what the technical reason? and whether it significant or not if the beam attach at the both end, what I mean is 1 in the top I at bottom (in plane), zig zag formation due to architectural design, its critical or just simply issue? will the column suffer a great twisting moment? Thanks

if just in simple building structure (ordinary moment frame with shear wall as lateral resisting structure) is still need a push over analysis? or static equivalent is enough? I've a building 29 story, what the suggestion methods for the seismic analysis? can I just doing response spectrum analysis? or need more detail analysis due to irregularities the building in seismic design category "A" and using ordinary moment frame (RCC) and shear wall as lateral resisting structure

Hi, can someone advice me about time history analysis, when we should use response spectrum and when to use a time history analysis whether it depend on the building height? the building seismic design category or? I'm very appreciete if someone willing to advice Thanks

Noted and very thanks for your advice mr. Uzair

Noted and very thanks for your advice mr. Umar

hi, can someone advice me how to analyse a big Circle shape pile cap supporting by borepile for circular tank foundation? I have control the pilecap depth by punching shear stress but I dont have idea to calculate the required reinforcing bar area. thanks