Rigid connection with toothed strip to concentrate transmission of compression loads between  diagonal steel member and concrete core 

Metropol Parasol, Seville, 2011; architects: Jürgen Mayer H.; structural planning: Arup

Rigid connection with toothed strip to concentrate transmission of compression loads between diagonal steel member and concrete core Metropol Parasol, Seville, 2011; architects: Jürgen Mayer H.; structural planning: Arup

Image credit: Frank Kaltenbach