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by ruipinho
25 Apr 2023, 11:09
Forum: 05-Future developments & requests
Topic: UHPC (Ultra-High Performance Concrete) model
Replies: 3
Views: 3058

Re: UHPC (Ultra-High Performance Concrete) model

Dear Roshen, dear Amr Masoud, Personally, it is not clear to me why a new constitutive model would need to be implemented in SeismoStruct in order to be able to analyse structures with UHPC. Indeed, I would immagine that, by appropriately setting the parameters of one of the already implemented mate...
by ruipinho
05 Sep 2022, 13:28
Forum: 03-Analytical/modelling capabilities
Topic: Viscoelastic damper curve type
Replies: 7
Views: 1611

Re: Viscoelastic damper curve type

Hi Ali, I carried out a search on the term "Kelvin" in SeismoStruct User Manual and Help System, and found the following: The dashpt element may be employed whenever the need arises for the introduction of a Maxwell model (i.e. series coupling of damping and stiffness), by placing in serie...
by ruipinho
23 May 2022, 11:51
Forum: 03-Analytical/modelling capabilities
Topic: How to simulate the soil-structure interaction
Replies: 16
Views: 7087

Re: How to simulate the soil-structure interaction

Sukalyan,

Have you tried downloading the report linked above and searching "zw"?

Rui
by ruipinho
19 May 2022, 00:31
Forum: 03-Analytical/modelling capabilities
Topic: How to simulate the soil-structure interaction
Replies: 16
Views: 7087

Re: How to simulate the soil-structure interaction

Hi langxuzeng, There are a number of publications that describe how to estimate soil damping coefficients (which can be used to represent both radiation and material/hysteretic damping). The two that come more quickly to my mind are: - Gazetas, G. [1991] “Foundation vibrations,” Foundation Engineeri...
by ruipinho
02 Mar 2022, 12:43
Forum: 03-Analytical/modelling capabilities
Topic: Viscoelastic damper curve type
Replies: 7
Views: 1611

Re: Viscoelastic damper curve type

Dear ali_hssn, While there is indeed not a dedicated viscoeleastic damper element in SeismoStruct's elements library, can you not follow one of the two following alternative modelling strategies: - introduce link+dashpot elements in parallel in order to directly reproduce the velocity-dependent beha...
by ruipinho
30 Aug 2021, 16:59
Forum: 03-Analytical/modelling capabilities
Topic: Fluid Viscous Dampers internal force
Replies: 14
Views: 2094

Re: Fluid Viscous Dampers internal force

Personally, I tend to avoid the inclusion of equivalent viscous damping in my models, which has been extensively shown to be problematic and to potentially lead to important underestimation of the response of structures, especially when these are pushed highly into the nonlinear range. There is real...
by ruipinho
17 Jan 2019, 00:10
Forum: 03-Analytical/modelling capabilities
Topic: Post Tension Rocking Wall
Replies: 1
Views: 1308

Re: Post Tension Rocking Wall

Hi Kirkaguel, There are many ways in which post-tensioned rocking walls may be modelled in Finite Element programs, either using nonlinear spring/link elements alone or through a combination of nonlinear frame/shell elements plus nonlinear springs/links. As an example, I can point you to Chapter 2 o...
by ruipinho
06 Jan 2019, 16:10
Forum: 03-Analytical/modelling capabilities
Topic: Damping Recommendation from ATC 72
Replies: 5
Views: 2482

Re: Damping Recommendation from ATC 72

Kirkaguel, Just a quick note to support the (always wise) comments of huffte; there is no such thing as A correct or superior equivalent viscous damping model option. Indeed, if you do a thorough literature review on the subject, you will quickly realise that over the past 20 years many different pr...
by ruipinho
20 Dec 2015, 20:24
Forum: 02-Getting started with the modelling
Topic: How to model waffle slabs.
Replies: 2
Views: 3210

Re: How to model waffle slabs.

Peit, This response probably comes too late, but let me in any case suggest the work of A. Benavent on modelling of waffle slabs in seismic regions (including comparisons with experimental tests). You may find his papers by e.g. carring out a search in Google Scholar (using "Benavent waffle sla...

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