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Questions related from Ahmed Hussein Olat
When calculating consolidation settlement under structure loads, it is recommended to use the net foundation stress (net foundation stress= stress of the structure - the stress of the excavated...
02 July 2020 7,287 5 View
Dear researchers, when modelling compacted granular fill or compacted clay fill on a clay soil, during the analysis, will you use the undrained or drained parameters of the a) compacted...
27 April 2020 7,445 5 View
Dear Researchers, In FEM software like ETABS instead of incorporating long shell elements in piles, what is the other alternative that could be defined in ETABS, like what should the geotechnical...
04 April 2020 5,227 7 View
Dear Researchers, How can I model moving loads (in cycles) e.g that of a railway line in PLAXIS 2D?
07 September 2018 3,142 2 View
From the paper "Seismic soil pressure for building walls: An updated approach" by Farhang Ostadan (2005), I tried to do the steps given in the paper but I am stuck in following the approach. Any...
26 June 2018 8,939 5 View
When designing and calculating the loads on the retaining wall, How do we consider the surcharge load that affects wall A in the given picture?
12 June 2018 993 4 View
Dear Researchers, When modelling using geogrids to reinforce weak soil in plaxis, what are the correct boundary conditions?
03 April 2018 8,563 5 View
While doing liquefaction analysis, what is the correct water boundaries during the analysis? -seepage -outflow?
21 March 2018 7,457 8 View
How to model geogrids (the ground improvement technique in plaxis)?
28 February 2018 2,084 9 View
Dear Researchers, 1. The soil improvement technique Deep Soil Mixing (DSM) is very common presently. How do we model the DSM columns of a given site in PLAXIS? 2. While liquefaction risk is...
26 February 2018 9,730 5 View
Dear Researchers, I want to model a pile and perform Non-linear analysis in Sap2000. My idea is giving the pile a certain displacement from an earthquake data and analysing the pile in...
21 February 2018 6,675 3 View
Dear Researchers, I would like to model a pile for instance and add struts at different points (they will be acting as a wall) and then after the analysis. I would find the Forces. I will then...
23 January 2018 7,371 13 View
Attached below is a pdf file of only one page that has the images of the Ru values. The question is; UBCSM ru, UBCSM rumax and Ru are different. Which is the correct value of the given Ru values?
13 January 2018 7,409 7 View
Dear Researchers, I would like to get assistance in Calibration of Parameters for non-linear analysis using DEEPSOIL and PLAXIS. Below is the attached model use in this case study. Aim: Analyse...
12 January 2018 5,395 2 View
Which value of ru should be considered at the end of the analysis?? if ru isbigger than 1 does it mean liquefaction occcured? and is it possible to get values more than 1? When adding piles...
28 December 2017 7,399 8 View
when constructing the Q-z and T-z values in every unit (one meter ) we define a spring element in SAP2000. I apply Q-z at the tip springs of the pile and the T-z at the other springs. When...
20 December 2017 3,695 3 View
In plaxis when doing dynamic analysis or liquefaction it is advised to do analysis in 1. Ko , initial phase 2. phase 1 with DIFFERENT SOIL characteristics and Phase 3 the dynamaic analysis with...
19 December 2017 2,349 5 View
When selecting certain boundaries in plaxis (like tied degrees of freedom and free field) are we supposed to introduce an interface at the vertical and horizontal part of the boundary?
19 December 2017 3,926 2 View
while doing analysis with deepSoil we use parameters like γ, Vs and the depth of the soil layer together with the Earthquake data of the given region and from the analysis we get the relative...
07 December 2017 7,268 5 View
I want to use the same data of earthquake in deepsoil and plaxis, what should we change so that they both run together....
29 November 2017 5,014 4 View
Dear all, When conducting plaxis analysis the elastic modulus of soils is used as an input in Mohr Coulomb and Hardning Soil models, E´and E50 in drained conditions, respectively. The...
01 January 1970 4,454 7 View
Dear All, When designing structures using computer programs such as CSI SAP2000 or ETABS or any other equivalent software, generally, we input the subgrade modulus in the form of kN/m3. This value...
01 January 1970 6,700 3 View
Dear researchers, In triaxial tests, we conduct the following tests. Unconsolidated Undrained-------cu (undrained shear strength) Consolidated Undrained-------c´ and ϕ´ (effective parameters), c...
01 January 1970 7,929 2 View
Dear Researchers, In the HS model there is the shear modulus value (Go) that we input in the parameters tab. The maximum shear modulus is given as Gmax=ρVs2. But as I noticed in many papers and...
01 January 1970 1,452 7 View
When conducting analysis of foundation on rocks, and the triaxial test results of the rock material is found as c=3 MPa and ϕ= 44 degrees. In analysis, this cohesion value has to be reduced to...
01 January 1970 10,093 26 View
Dear researchers, Is there a reason why the lowermost anchors in anchored wall or pile system is stressed at higher loads than the upper anchors. I know of the earth pressures in sand s and clay...
01 January 1970 2,537 2 View
Dear Researchers, According to FHWA GEC 009 (https://vulcanhammernet.files.wordpress.com/2019/10/nhi18031.pdf) document, "It must be recognized that the presence of free water does not...
01 January 1970 4,342 0 View
Dear Researchers, When conducting pseudo static slope stability in plaxis for a certain kh value of 0.4. The model collapses, meaning that the peak acceleration is too much for the model (of...
01 January 1970 7,185 0 View
Dear Researchers, The modulus of subgrade reaction is widely used in the Winkler beam method on an elastic foundation. The most reliable estimation is given by Bowles [1996] as it takes into...
01 January 1970 2,203 6 View
Dear Researchers, Are there any references or standards regarding the allowable deformations of buried structures (e. box culvert) in either seismic or service conditions?
01 January 1970 3,276 2 View
If the groundwater level is way too deep from the ground surface (-50 metres), for clay soils, can undrained parametres be used? (lets assume that one wants to do an undrained analysis) Since...
01 January 1970 1,834 3 View
When calculating Gmax of soils by ρ*Vs^2. Does this value reduce or increase if the soil is below or above water table?
01 January 1970 8,222 4 View
Correlation for effective cohesion in the literature is commonly given by Sorensen (2013) as c´=0.1*cu But this correlation is only suitable for...
01 January 1970 4,486 3 View
