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The Caltrans Seismic Design Criteria (SDC) Version 1.3, published in February 2004, outlines the minimum seismic design requirements for ordinary bridges to ensure they meet performance goals during seismic events. It consolidates existing and new criteria into a comprehensive guide for bridge designers, emphasizing the need for periodic updates to reflect current practices. The document specifies design methodologies, component classifications, and analytical approaches necessary for effective seismic performance. It also addresses unique challenges posed by different bridge types and soil conditions, providing guidelines for structural analysis, material properties, and detailing requirements to enhance resilience against earthquakes.

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What determines seismic design category?

If A Seismic Design Category is a classification assigned to a structure based on its occupancy category, and the severity of the design earthquake ground motion.

What are the considerations for seismic design?

All objects, including buildings, have a natural or fundamental period at which they vibrate if jolted by a shock. The natural period is a primary consideration for seismic design, although other aspects of the building design may also contribute to a lesser degree to the mitigation measures.

What are the basics of seismic design?

Seismic Design Factors Low Height to Base Ratios. Equal Floor Heights. Symmetrical Plans. Uniform Sections and Elevations. Maximum Torsional Resistance. Short Spans and Redundancy. Direct Load Paths.

What are the principles of seismic design?

Architects and engineers design earthquake-proof buildings through flexible foundations, damping, vibration deflection technology, shear walls, cross braces, diaphragms and moment-resisting frames.

What are the different types of seismic design?

Seismic Design Category A Corresponds to buildings in areas where expected ground shaking will be minor. Good Soils. Seismic Design Category B Corresponds to buildings of Occupancy Groups I, II and III where expected ground shaking will be moderate. Stratified soils with Good and poor Soils.

What are the elements of seismic design?

Structural Seismic Design Elements Structural features like base isolation systems, moment-resistant frames, and shear walls are designed to handle seismic forces. They help absorb shocks, maintain stability, and spread energy across the building, reducing the risk of structural failure during an earthquake.

What are the main considerations for seismic design?

The basic considerations for seismic design are related with the ductility capacity of the structure, allowable inter-story drift, response- modification coefficient R, second order effects, lateral torsional buckling for members, foundation stiffness assumptions for support the structure to include soil-structure-

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How to modify SEISMIC DESIGN CRITERIA in PDF format online

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What determines seismic design category?

What are the considerations for seismic design?

What are the basics of seismic design?

What are the principles of seismic design?

What are the different types of seismic design?

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What are the elements of seismic design?

What are the main considerations for seismic design?

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