Based on damage mechanics and fracture mechanics theory

the block masonry walls subjected to compressive and lateral loads were selected as research subject

and the numerical simulation of the fracture progressing in the walls was carried out by adopting the simplified micro-modeling technique and the cohesive surface model in which the bonding strength

damage and slip between the interactive interfaces were taken into account.Three iterative algorithm were discussed

and the main factors related to the shear strength and fracture patterns

namely the compressive loads

aspect ratios and mortar strength

were analyzed.In addition

the numerical simulation results were compared with buildings damaged in Wenchuan earthquake.The results indicted that compressive loadings and aspect ratios change the cracking loads and fracture patterns significantly

and the mortar strength plays vital parts in the integral working performance.The simulation can accurately reflect the crack initiation

propagation until rupture through the whole wall

and the results are in good agreement with buildings damaged in Wenchuan earthquake.The method and conclusion can provide beneficial references for in-depth numerical simulation of fracture process in masonry wall and structural reliability analysis.