Why the temperature stress in a statically determinate structures corresponds to no change in stress resultant?

equilibrium

03 April 2017 6,444 4 View

Do concrete have relaxation?

Exclude the effect of shrinkage

03 April 2017 3,552 4 View

Creep sometime called plastic flow. The internal mechanism of creep may be due to one or a combination or reasons. What are these reasons?

interpretation of creep

03 April 2017 1,596 0 View

In vibration analysis of multi-degree of freedom system, what is the value of the off-diagonal elements of the consistent mass matrix?

Vibration analysis

02 March 2017 8,876 0 View

Is it correct that the value of the prestressing force which calculated by ACI code and AASHTO equals Aps*fpi?

why these codes ignored the effect of the nonprestressed steel and concrete on this value?

01 January 1970 5,335 9 View

What is the time period required to determine the ultimate value of the intrinsic relaxation for steel strands?

how many hours?

01 January 1970 4,849 7 View

What is the degree of the formula used to determine the depth of compression zone in members subjected to axial load and uniaxial bending moment?

columns

01 January 1970 6,151 12 View

How the descending branch of the stress-strain diagram of concrete under uniaxial compression can be determined experimentally?

What type of compression machines shall be used?

01 January 1970 7,082 6 View

Buffer Exchange using column packed with sephadex G-25 effect on protein concentration?

Hello, If i am doing a buffer exchange for an antibody of 1mg/mL, does the elution lose protein in the process of buffer exchange? For example, if i flow through 500 uL of 1mg/mL sample, and...

03 March 2021 6,299 3 View

No title

03 March 2021 5,360 2 View

How can we raise the figure when we writing a paper with Latex ?

Hi, everyone. I'm a starter to write a paper by Latex. But I have some difficulty using it. I'm writing the paper with 2 columns. And, there is one figure that occupies the 2 both-sides. I want to...

26 February 2021 3,738 3 View

What is the best way to calculate the angles of twist for concrete columns subjected to torsional moment using finite element software?

In Finite element software like ANSYS , there is difficulty in obtaining direct results of twisting of concrete members because SOLID65 which is the unique element designed to represent concrete...

26 February 2021 3,806 2 View

Compute for the total volume of concrete needed for the concrete pouring of the foundation including its column up to NGL only as shown in the plan?

Looking for the quantity of cement, sand, and gravel of footings and columns. Thank you!

25 February 2021 3,092 2 View

No amplification data for qPCR on MxPro?

I have set up a qPCR run on MxPro with SYBR green and ROX as a reference, however, when I go to the analysis section the program seems to only collect data for the dissociation curves and not the...

25 February 2021 8,039 1 View

Can I use TCA instead of TFA for protein analyis in RP-HPLC?

I am trying to analyze lipase using the reverse phase-HPLC C18 column. In the literature, 0.1 % TFA was and 60% ACN was used. Can I use TCA in place of TFA? If any other methods are available to...

25 February 2021 2,388 3 View

Can I use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography?

Hi! I would want to know if I can use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography. This column has a polyethylene glycol phase, but I can't find the manual to check...

22 February 2021 730 2 View

My silica gel column dried can I somehoe save the trapped matter?

I tried to separate my substance from a protein in a sillica gel column. By mistake, it dried and cracked. Can I save the trapped substance? Can I repack it ,or at least elute all of the trapped...

22 February 2021 1,789 3 View

Physical-chemical formation of stalactites/stalagmites. what promotes the formation/growth of these structures?

I know, or think I do, the basic idea behind these natural structures, as from what I know they form due to water dripping from the top leaving a salt deposit behind. But started to wonder about...

22 February 2021 1,400 4 View