The Multangular-Pyramid Concave Friction System (MPCFS) for seismic isolation: A preliminary numerical study

Preliminary study on the threshold stiffness and residual displacement of the multangular-pyramid concave friction system (MPCFS) for seismic isolation

“…As shown in Figure 4, this numerical model presented here was also applied in previous studies conducted by Xiong et al (2017, 2018). The consideration behind this model adoption is that the numerical results can be easily compared between parallel investigations.…”

“…The further improved State-Space Method (SSM) for solving the equations of MPCFS can be found in Xiong et al (2018). This SSM approach was successfully validated in numerous previous studies, so that in this research it is viewed as efficient and accurate in predicting dynamic structural response of the building model with MPCFS during earthquakes.…”

“…A numerical model for evaluation of the threshold stiffness and the restoring capacity of MPCFS is introduced, as presented in Figure 4. The analytical tool used for numerical simulation and the modelling details of the two seismic isolation systems are presented in the Xiong et al (2017, 2018). Parameters used in the numerical model are presented in Tables 1 and 2.…”

“…More details about the distinctive features of MPCFS can be found in Xiong et al (2017, 2018). A real prototype of the MPCFS will be tested in the near future, in order to acquire its material characteristics, relation between friction, and sliding velocity, etc.…”

“…Apart from previous study (Xiong et al, 2018), in this research, the threshold stiffness (breakaway force) and residual offset of the Multangular-Pyramid Concave Friction System (MPCFS) for seismic isolation are both investigated. Different to the conventional Curved Surface Slider (CSS), the MPCFS has a higher threshold stiffness and no residual displacement after earthquakes.…”