Base Isolator

The Lombok and Palu Earthquakes that have recently occurred in Indonesia caused
significant damage. Earthquakes are closely related to damage, landslide, and the loss
of life and economy. However, the causes of these things are not solely due to the
earthquake itself. The cause loss of life and economy caused solely due to the collapse
of buildings that built by humans during an earthquake. To reduce impact loss of life and
economy, Performance Based Seismic Design (PBSD) using based isolator can be one
of the solution. By using PBSD economic considerations the cost of repair after an
earthquake can be predicted. In this study, modeling 12-storey reinforced concrete
buildings located in Yogyakarta Indonesia stands on soft soil using base isolator High
Damping Rubber type (HDR HH090X4S, thickness 20 cm product of Bridgestone). The
average of non-linear dynamic time history analysis of seven ground motion respectively
Denali earthquake 2002, Imperial Valley 1940, Kobe 1995, Loma Prieta 1989,
Northridge 1994, San Fernando 1971, Superstition Hills 1987 was conducted. Seismic
response modification coefficient R was taken respectively 2.5, 3.5, 5.5, and 8. From
these coefficients, the performance of the building is obtained with R 2.5 and R 3.5
performance building in the category of immediate occupancy, R 5.5 and R 8 Category
damage control. Thus the building with R 2.5 and R 3.5 according to FEMA 273 will
produce a building with a repair cost of 25% and repair time only 1 day, so that after
the earthquake the building can resume normal operation.

The Lombok and Palu Earthquakes that have recently occurred in Indonesia caused
significant damage. Earthquakes are closely related to damage, landslide, and the loss
of life and economy. However, the causes of these things are not solely due to the
earthquake itself. The cause loss of life and economy caused solely due to the collapse
of buildings that built by humans during an earthquake. To reduce impact loss of life and
economy, Performance Based Seismic Design (PBSD) using based isolator can be one
of the solution. By using PBSD economic considerations the cost of repair after an
earthquake can be predicted. In this study, modeling 12-storey reinforced concrete
buildings located in Yogyakarta Indonesia stands on soft soil using base isolator High
Damping Rubber type (HDR HH090X4S, thickness 20 cm product of Bridgestone). The
average of non-linear dynamic time history analysis of seven ground motion respectively
Denali earthquake 2002, Imperial Valley 1940, Kobe 1995, Loma Prieta 1989,
Northridge 1994, San Fernando 1971, Superstition Hills 1987 was conducted. Seismic
response modification coefficient R was taken respectively 2.5, 3.5, 5.5, and 8. From
these coefficients, the performance of the building is obtained with R 2.5 and R 3.5
performance building in the category of immediate occupancy, R 5.5 and R 8 Category
damage control. Thus the building with R 2.5 and R 3.5 according to FEMA 273 will
produce a building with a repair cost of 25% and repair time only 1 day, so that after
the earthquake the building can resume normal operation.

The intent of this article is to present a methodology that deals with steering/braking coordination task, for automotive vehicle yaw control scheme. Because of the tire nonlinearity that is mainly due to the saturation of cornering forces, vehicle handling performance is improved but limited to a certain extent only by steering control. Direct yaw moment control using braking forces is effective not only in the linear region but also in the nonlinear ranges of the tire friction circle. However, braking effect is not desirable in normal driving situations. Consequently, the maximum benefit is gained through the coordinated and combined use of both steering and braking control methods. In this study, the coordination task is achieved through a suitable gain scheduled LPV (Linear Parameter Varying) controller, where braking control is activated only when the vehicle reaches the handling limits. The controller is synthetized within the LMI framework, while ensuring linear optimal Hinf ...