How to add Isolators to a bridge?

Question

Habib Muhammad 2018-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/376854-how-to-add-isolators-to-a-bridge

回答： shah Akshat 2022-11-5

i have a bridge model and i want to add isolation system to study it seismic response. how can i add my isolation code to the main bridge analysis code.. Thanks in advance.

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Nirpex Patel 2020-10-29

You can try to design Friction Pendulum System (FPS) because the period of vibration of the isolated structure is independent of the support mass and dependent only on the geometry of the bearings. Furthermore,The lateral force is directly proportional to the weight they carry.

To generate simple model of the FPS, you only need to know the target period "T" (to calculate the radius of curvature "R"), the weight of your structure "W" and some information about the friction coefficient "mu".

T=2pi*sqrt(R/g)

F=(W/R)u+(mu*W)*sgn(udot)

where "u" is the FPS displacement and "udot" is the FPS velocity.

wish you all the best.

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