Download ASCE standard ASCE/SEI 41-13 : American Society of Civil by American Society of Civil Engineers PDF

By American Society of Civil Engineers

Seismic review and Retrofit of current structures describes deficiency-based and systematic systems that use performance-based rules to judge and retrofit latest constructions to resist the consequences of earthquakes. This next-generation regular combines the overview and retrofit procedure and places forth a three-tiered method for seismic evaluate in line with more than a few development functionality levelsfrom cave in prevention to operationalthat marry exact structural functionality with the functionality of nonstructural parts. The deficiency-based tactics permit the review and retrofit attempt to target particular capability deficiencies deemed, at the foundation of earlier earthquake observations, to be of outrage for a permissible set of creating forms and heights. The systematic approach, acceptable to any development, units forth a technique to guage the complete construction in a rigorous demeanour. This usual updates and replaces the former average ASCE/SEI 41-06, Seismic Rehabilitation of present structures, in addition to common ASCE/SEI 31-03, Seismic overview of present constructions.

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Additional info for ASCE standard ASCE/SEI 41-13 : American Society of Civil Engineers : seismic evaluation and retrofit of existing buildings

Sample text

In other cases, a reduced level of performance has been allowed to avoid damaging historic fabric during retrofit. In other cases, a higher Performance Objective has been used to enhance postearthquake repairability of historic features. Codes and policies regulating historic buildings have tried to balance a desire for improved seismic performance with a commitment to preservation. This standard’s criteria, however, do not directly or explicitly address specific preservation objectives. Where historic preservation concerns would inform a project’s seismic performance objective, this standard might therefore be inadequate if applied simply as written.

Boundary Component: A structural component at the boundary of a shear wall or a diaphragm or at an edge of an opening in a shear wall or a diaphragm that possesses tensile or compressive strength to transfer lateral forces to the seismic-forceresisting system. 1 in Chapter 2. 4 in Chapter 2. Braced Frame: A vertical seismic-force-resisting element consisting of vertical, horizontal, and diagonal components joined by concentric or eccentric connections. BSE-1E: Basic Safety Earthquake-1 for use with the Basic Performance Objective for Existing Buildings, taken as a seismic hazard with a 20% probability of exceedance in 50 years, but not greater than the BSE-1N, at a site.

Flexible Connection: A link between components that permits rotational or translational movement without degradation of performance, including universal joints, bellows expansion joints, and flexible metal hose. Flexible Diaphragm: A diaphragm with horizontal deformation along its length twice or more than twice the average story drift. Seismic Evaluation and Retrofit of Existing Buildings Force-Controlled Action: An action that is not allowed to exceed the nominal strength of the element being evaluated.

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