A Displacement-Focused Seismic Design of Mixed Building Systems

2002 ◽  
Vol 18 (4) ◽  
pp. 689-718 ◽  
Author(s):  
Tom Paulay
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Preliminary Design ◽  
Design Strategies ◽  
Displacement Ductility ◽  
Building Systems ◽  
Concrete Building ◽  
Displacement Based ◽  
Mixed Systems ◽  
Prediction Of Displacements

A postulated prediction of displacements in ductile reinforced concrete building systems is based on a redefinition of basic structural properties. Contrary to the ability of traditional techniques, the proposed approach permits displacement limits, relevant to ductile mixed systems, i.e., those with markedly differing components, to be established before details, such as strengths, are addressed. This should lead to significant benefits at the stage of preliminary design. Acceptable displacement limits, associated with currently introduced direct displacement-based seismic design strategies, can be readily and simply established. Similarly, limits of displacement ductility demands on components and the system, associated with current force-based approaches, can be estimated already as part of the preliminary design.

scholarly journals Seismic displacement capacity of ductile reinforced concrete building systems

2003 ◽  
Vol 36 (1) ◽  
pp. 47-65 ◽  
Author(s):  
Tom Paulay
Keyword(s):  
Reinforced Concrete ◽  
Structural Properties ◽  
Performance Criteria ◽  
Structural System ◽  
Reinforced Concrete Building ◽  
Seismic Displacement ◽  
Displacement Capacity ◽  
Building Systems ◽  
Concrete Building ◽  
Mixed Systems

To enable acceptable seismic displacement demands to be estimated, the displacement capacity of a structural system needs to be known. This is controlled by selected performance criteria. It is postulated that the assignment of fractions of the required seismic strength of a system to its components may be arbitrary. This enables the displacement capacity of buildings to be evaluated without the knowledge of the magnitude of seismic strength. A redefinition of some traditionally used structural properties is a prerequisite for applications. The following study of reinforced concrete mixed systems illustrates rationale and extreme simplicity of application.

fib Bulletin 25. Displacement-based seismic design of reinforced concrete buildings

2003 ◽  
Author(s):  
G. Michele Calvi ◽  
Daniel P. Abrams ◽  
Hugo Bachmann ◽  
Shaoliang Bai ◽  
Patricio Bonelli ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Reinforced Concrete Buildings ◽  
Concrete Buildings ◽  
Displacement Based ◽  
Displacement Based Seismic Design

Seismic response of structural walls: recent developments

2001 ◽  
Vol 28 (6) ◽  
pp. 922-937 ◽  
Author(s):  
T Paulay
Keyword(s):  
Reinforced Concrete ◽  
Seismic Response ◽  
Seismic Design ◽  
Limit State ◽  
Lateral Force ◽  
Structural Walls ◽  
Structural Class ◽  
Response Component ◽  
Displacement Ductility ◽  
Ductility Capacity

It is postulated that for purposes of seismic design, the ductile behaviour of lateral force-resisting wall components, elements, and indeed the entire system can be satisfactorily simulated by bilinear force–displacement modeling. This enables displacement relationships between the system and its constituent components at a particular limit state to be readily established. To this end, some widely used fallacies, relevant to the transition from the elastic to the plastic domain of behaviour, are exposed. A redefinition of stiffness and yield displacement allows more realistic predictions of the important feature of seismic response, component displacements, to be made. The concepts are rational, yet very simple. Their applications are interwoven with the designer's intentions. Contrary to current design practice, whereby a specific global displacement ductility capacity is prescribed for a particular structural class, the designer can determine the acceptable displacement demand to be imposed on the system. This should protect critical components against excessive displacements. Specific intended displacement demands and capacities of systems comprising reinforced concrete cantilever and coupled walls can be estimated.Key words: ductility, displacements, reinforced concrete, seismic design, stiffness, structural walls.

Preliminary Design of Low-Rise Buildings Stiffened with Buckling-Restrained Braces by a Displacement-Based Approach

2009 ◽  
Vol 25 (1) ◽  
pp. 185-211 ◽  
Author(s):  
Amador Teran-Gilmore ◽  
Neftali Virto-Cambray
Keyword(s):  
Mexico City ◽  
Seismic Design ◽  
Mechanical Characteristics ◽  
Ground Motions ◽  
Flexural Behavior ◽  
Preliminary Design ◽  
Lake Zone ◽  
Buckling Restrained Braces ◽  
Displacement Based ◽  
Story Building

A displacement-based methodology for the preliminary design of a system of buckling-restrained braces is introduced. The methodology applies to the case of low-rise buildings, whose dynamic response is not significantly influenced by global flexural behavior or higher modes. The methodology is applied to the preliminary design of a five-story building located in the Lake Zone of Mexico City. From the evaluation of the global mechanical characteristics of the building and of its seismic performance when subjected to ground motions generated in that zone, it is concluded that the proposed methodology yields an adequate level of seismic design.

Displacement-based seismic design of regular reinforced concrete shear wall buildings

2011 ◽  
Vol 38 (6) ◽  
pp. 616-626 ◽  
Author(s):  
JagMohan Humar ◽  
Farrokh Fazileh ◽  
Mohammad Ghorbanie-Asl ◽  
Freddy E. Pina
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Pushover Analysis ◽  
Shear Wall ◽  
Base Shear ◽  
Ductility Demand ◽  
Inelastic Demand ◽  
Displacement Based ◽  
Ductility Capacity ◽  
Shear Demand

A displacement based method for the seismic design of reinforced concrete shear wall buildings of regular shape is presented. For preliminary design, approximate estimates of the yield and ultimate displacements are obtained, the former from simple empirical relations, and the latter to keep the ductility demand within ductility capacity and to limit the maximum storey drift to that specified by the codes. For a multi-storey building, the structure is converted to an equivalent single-degree-of-freedom system using an assumed deformation shape that is representative of the first mode. The required base shear strength of the system is determined from the inelastic demand spectrum corresponding to the ductility demand. In subsequent iterations a pushover analysis for the force distribution based on the first mode is used to obtain better estimates of yield and ultimate displacements taking into account stability under P–Δ effect. A multi-mode pushover analysis is carried out to find more accurate estimates of the shear demand.

Sign in / Sign up

Export Citation Format

Share Document