Patent ID: 11866956
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  A  B  F | IPC A  B  E  F

Claim 19:
20. A device as claimed in claim 1 wherein the device comprises a mount to directly support a structure to a foundation, and wherein the flexural member comprises:
a yield plate with two second regions and the first region being provided between the second regions, the first region of the yield plate anchored to the first structural member of a structure being an upright column member or chord member;
the yield plate extending each side of the first region, in the form of two wings, each wing extending from the first region to each of the second regions;
the second regions of the yield plate, anchored by two second anchors to the second structural member being a base or foundation;
the upright structural member able to apply an oscillatory force to the first region of the plate causing the plate to flex and locally yield at the plates first region;
the first end region being a yield zone of the plate;
the boundary conditions of the second regions and second anchors being configured to allow the second regions to translate and rotate relative to their hold down anchors, and the first region, and to allow the length along a flexing curve of the plate between the anchors to freely increase or decrease, without generating any membrane forces within the plate or prying actions between second regions, second anchors or foundation;
the plate being configured to flex into a monotonic curve and yield at the yield zone as it is pulled away from its base by uplift action from the upright column member, and pushed back to its initial position by reversing action in the column member as the column member and the structure it is part of oscillates or rocks in response to base motion input from a seismic event;
the yield plate maintaining a constant resistive yield force, with displacement, between the first structural member, the upright column member, and the second structural member;
and enabling the structure to control and limit forces developed within itself, and control and limit forces developed within the foundations or base, and control and limit response accelerations and dynamic forces developed within masses that it may be seismically supportive of, or masses supported by other structures which it may be seismically supportive of, as it resists and endures with a constant resistive yield force, base motion, or ground motion input due to a seismic event.