Seismosoft | Earthquake Engineering Solutions

Dear Seismosoft,

When defining a reinforced concrete rectangular section (rcrs)there is the option to 'Edit reinforcement pattern', which allows the user to define a simple pattern of reinforcing. The centre of all reinforcing bars are located on the margin between core and cover concrete.

This is incorrect as the core area is defined by the centre lines of the hoops (this in reference specifically to the Mander et al. [1988] model "Ac=area of core of section enclosed by the center lines of the perimeter spiral or hoop"). The centre of the bars should in fact be located half a bar diameter plus half a hoop diameter in from the margin of the core and cover concrete.

Is this something that could be amended for future versions?

I apologise if I have overlooked something or missed a previous post on the topic.


Kind regards,

Matt Fox.

Dear Matt,

Thank you for bringing this issue to our attention. We will correct it in a future version of SeismoStruct.

Seismosoft Developer

yes i have problem like that too.when the new version of seismpstruct will be coming?

Hi salar,

This is "only" a visualisation imperfection, which does not affect calculations, hence we have not classified it as something requiring an urgent intervention (also because it is quite time-consuming to address it).

Hence, in the upcoming v6.5 release of SeismoStruct, in one or two weeks time, this issue will not have been addressed yet, whilst we will try to consider it for the v7 release of later this year.

Seismosoft Support

hi seismostruct
I really like ,seismostruct improvement.
i wish seismostruct to have "section designer" to define various section in concete.
and rebar in "inch" and "mm" work together in simply defining rebar diameter.

Hi Salar,

Thank you for the kind feedback. Please do use the 'Future Developments & Requests' folder for posting wishes for future features.

Thanks again,

Seismosoft Support