Hi everyone,
Iam performing a pushover analysis on historic masonry structure and i would like to be sure that the lateral seismic force calculation is correct.
1- I calculated the lateral seismic force (Fi) basing on Eurocode 8 recommendation (Annex B) which is equal to Fi=mi*∅i (mi: is the mass in the i-th storey; ∅i: is the normalized dispalcement in such a way that ∅n= 1, where n is the control node in the roof level.
Consequently, we consider Fn=mn
The total mass (mn), volume (V) and height (h) of my building obtained from Abaqus (Queryinformation) respectively are:
Fn=mn= 2.43e+07 N, V= 1.22e+012 mm3, h=14930 mm.
2- I inserted in abaqus the lateral force as volumic distribution (Fn= 1.99e-05 N/mm3) using gravity load option and respecting separatly X and Y direction.
3- In order to obtain an increasing lateral loading, i determined the linear distribution function: F(z)= 1.33e-9*Z+1.99e-5 (Z: the vertical axis).
The scheme distribution seems correct but i have a dubt about the inserted values.
My second question, Which values please can i used for the Concrete Damaged plasticity for a masonry material (terracotta brick+ lime mortar) ?
I thank you in advance for your availability and responses.
https://www.iitk.ac.in/nicee/wcee/article/1866.pdf
Article Pushover procedure for seismic analysis of buildings
Earthquake loads are usually applied to the base (or floor) of the structure as a time history of acceleration. Follow this path:
1- Load>create boundary condition>name:?>step:?>Category: Mechanical> Types for selected step: Acceleration/Angular acceleration>continue>” select the base of structure” 2- In the edit boundary condition window select the direction(A1,A2,...) and insert unit value for that(for example A1=1)
3- in the amplitude box click create and then choose tabular type.
4- in the amplitude edition window insert the values of time and amplitude based on selected acceleration history record for example El-centro record
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