What is the difference between between softened truss model and modified compression field theory?

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What is the reason of collapse of water tank shown in the attached you tube?

https://www.youtube.com/watch?v=WLEkC_JbTsQ

03 April 2017 1,301 2 View

Which type of multiple-cell box girder is better, cells connected by top flanges or cells connected both by top and bottom flanges?

How we can design box girder bridge?

02 March 2017 10,163 3 View

Why do BS8007 specify the allowable crack width of water retaining structure as 0.2mm for severe or very severe exposure?

Why 0.2 mm crack width?

02 March 2017 9,354 3 View

What is the effect of rusting on steel reinforcement?

How does rust affect on the bonding between steel bars and concret?

02 March 2017 3,458 10 View

In “High strength concrete” in buildings, 56 or 91-day compression test results are sometimes adopted instead of 28-day compression test results. Why?

In normal concrete structures, 28-day test results are often adopted.However, in the construction of high-rise buildings using “High strengthconcrete”, compressive strengths based on 56 or 91-day...

02 March 2017 8,839 19 View

What is the difference between working stress approach and limit state approach?

What about difference between those approaches regarding load and material safety factor?

02 March 2017 587 2 View

In carrying out compression test for concrete, should test cubes or test cylinders be adopted?

Relation between cubes and cylinder

02 March 2017 5,836 4 View

If concrete compression test fails, should Schmidt hammer test be adopted as an alternative test to prove the concrete strength?

Non destructive tests

02 March 2017 5,452 31 View

It is not necessary to design nominal reinforcement to piles. Is it true?

Can we use same code provisions of columns for piles?

02 March 2017 7,906 3 View

Can a concrete structure be completely free of expansion joints and contraction joints?

Assume that there is no differential settlement.

02 March 2017 7,651 3 View

Is it possible to plot the atom-projected band structure using GPAW?

Hi, I'm currently working on a project where I need to plot the atom-projected band structure using GPAW. I've been able to calculate the band structure for my material, but I'm having trouble...

07 August 2024 269 3 View

Should I include H atom into C3N5 when i am doing DFT modelling?

Hi all, my experimental XPS results shown that my C3N5 sample consists of N-H bond, hence in this case I should incorporate the N-H bond into my DFT modelling. However, I do notice several papers...

07 August 2024 8,414 2 View

How does grain and grain boundary affect the ceramic when studying its dielectric properties?

I am not able to get good literature and the physics behind how first these grains and grain boundaries arises out of no where when we make a pellet to study its dielectric properties and then how...

07 August 2024 5,177 3 View

Are there any good simple systems or platforms to recommend?

In order to show people the beauty of control and enhance enthusiasm for learning control theories, are there any good simple systems or platforms to recommend?

05 August 2024 10,034 1 View

Why do exism movements become permanent dictatorship threats within liberal democracy thinking under majority rule-independent rule of law system?

Exism movements after gaining power within liberal democracies under majority rule and independent rule of law system become permanent dictatorship threats, but why this is the case is not clear...

04 August 2024 8,125 3 View

How to use Density Functional Theory to calculate carrier mobilities of solid system?

Hello, everyone. I have tried to determine carrier motilities of some materials, by Density Functional Theory, using Quantum ESPRESSO. There are a few methods to do it, like a package called...

04 August 2024 8,894 1 View

Why is the molecule's orientation with an electric field affect polarizability?

Why is the molecule's orientation with an electric field affect polarizability? Electrons are diffuse enough to be independent with respect to orientation and effect of electric field on...

03 August 2024 7,843 1 View

Why do paired electrons atoms produce no magnetic field lines?

If you think of electrons with spin as bar magnets, you know bar magnets of opposite polarity as long as they're not occupying the same spatial location don't cancel out each other's magnetic...

03 August 2024 3,927 2 View

What is the reason I get 400nm nanoparticles using an extruder with 200 nm membrane for cell membrane coating?

I am trying to coat my micelles and PLGA based nanoparticles with cell membrane using an Avanti mini extruder according to literature . I use 200nm membrane but my particles end up to be 400nm And...

30 July 2024 3,294 3 View

How can I calculate formation energy using VASP-Ab-initio?

I would like to calculate the formation energy of P2-Na0.67Fe0.5Mn0.5O2 based on DFT, what should I do step by step. Any help would be appreciated. Thanks.

29 July 2024 8,248 2 View