Multi scale numerical approach for micro-cracked viscoelastic masonry T.T.Nga Nguyen, S.Tuan Nguyen, N.Quang Vu, T.Ta. Nguyen, N.Hung Tran and M. Ngoc Vu MATEC Web Conf., 251 (2018) 04031 Published online: 14 December 2018 DOI: 10.1051/matecconf/201825104031