Probabilistic assessment of SMRFs with infill masonry walls incorporating nonlinear soil-structure interaction

Abstract

Infill Masonry Walls (IMWs) are used in the perimeter of a building to separate the inner and outer space. IMWs may affect the lateral behavior of buildings, while they are different from those partition walls that separate two inner spaces. This study focused on the seismic vulnerability assessment of Steel Moment-Resisting Frames (SMRFs) assuming different placement of IMWs incorporating nonlinear Soil-Structure Interaction (SSI). The aim is to explore the damage states of IMWs and use their ability for improving the vulnerability of SMRFs. For this purpose, the three, five, seven, and nine story levels (3-Story, 5-Story, 7-Story, and 9-Story) SMRFs were modeled considering four soil types. Incremental Dynamic Analyses (IDAs) were performed to determine the seismic performance limit-state capacities of SMRFs considering the Far-Fault (FF) record subset suggested by FEMA P695. To accurately model the influence of IMWs on the seismic response of SMRFs, a Tcl programming algorithm was developed to intelligently monitor the damage states of IMWs in each floor level. Results of the analysis show that assuming different placement of IMWs can significantly increase the seismic limit-state capacities of SMRFs with and without considering SSI effects. In addition, IMWs can play a crucial role to improve the seismic performances as well as the seismic collapse probability, which may be suggested for retrofitting purposes.

The Effect of Soil-Structure Interaction (SSI) on Structural Stability and Sustainability of RC Structures

“…The relationship between the sub and super-structure is examined by modelling the soil as simply as possible to reflect the system's overall reaction. The research demonstrated how taking into account different variables, such as SSI and wall placement, significantly affects the building frame's period, displacement, and base shear [58]. Therefore, it is crucial to take into account all of these factors when analyzing designs.…”

“…Non-linear dynamic analysis has been used in research on the SSI impacts on the "seismic performances" of two-dimensional RC "Moment-Resisting Frames" (MRFs) [60]. The study shows that SSI has a different impact on seismic demand based on the modelling approach, with respect to maximum base shear as well as maximum inter-story drift ratio [61]. Few scholars have applied thorough nonlinear dynamic study of structures with various lateral "load-bearing" systems based on flexible soil.…”

Retrofitting Damaged Buildings Under Seismic ‎mainshock-Aftershock Sequence

“…Since the collapse of structures may occur due to external loads such as impact force of adjacent structures [14][15][16] or internal loss of strengths due to weakness of structural elements such as connections defects or gusset plates [17][18][19], there is a need to consider the damaged effects on the retrofitting of structures. The use of FVDs and BRBs in retrofitting damaged buildings under seismic MA sequences is especially important as these devices can absorb energy and reduce the force transmitted to the structure during both the mainshock and aftershocks.…”