TAILIEUCHUNG - Seismic Design of Reinforced Concrete Bridges

Seismic Design of Reinforced Concrete Bridges Introduction Two-Level Performance-Based Design • Elastic vs. Ductile Design • Capacity Design Approach 38 Typical Column Performance Characteristics of Column Performance • Experimentally Observed Performance Flexural Design of Columns Earthquake Load • Fundamental Design Equation • Design Flexural Strength • Moment–Curvature Analysis • Transverse Reinforcement Design Shear Design of Columns Fundamental Design Equation • Current Code Shear Strength Equation • Refined Shear Strength Equations Moment–Resisting Connection between Column and Beam Design Forces • Design of Uncracked Joints • Reinforcement for Joint Force Transfer. | Xiao Y. Seismic Design of Reinforced Concrete Bridges. Bridge Engineering Handbook. Ed. Wai-Fah Chen and Lian Duan Boca Raton CRC Press 2000 38 Seismic Design of Reinforced Concrete Bridges Introduction Two-Level Performance-Based Design Elastic vs. Ductile Design Capacity Design Approach Typical Column Performance Characteristics of Column Performance Experimentally Observed Performance Flexural Design of Columns Earthquake Load Fundamental Design Equation Design Flexural Strength Moment-Curvature Analysis Transverse Reinforcement Design Shear Design of Columns Fundamental Design Equation Current Code Shear Strength Equation Refined Shear Strength Equations Moment-Resisting Connection between Column and Beam Design Forces Design of Uncracked Joints Reinforcement for Joint Force Transfer Column Footing Design Seismic Demand Flexural Design Shear Yan Xiao University of Southern California Design Joint Shear Cracking Check Design of Joint Shear Reinforcement Introduction This chapter provides an overview of the concepts and methods used in modern seismic design of reinforced concrete bridges. Most of the design concepts and equations described in this chapter are based on new research findings developed in the United States. Some background related to current design standards is also provided. Two-Level Performance-Based Design Most modern design codes for the seismic design of bridges essentially follow a two-level performancebased design philosophy although it is not so clearly stated in many cases. The recent document ATC-32 2000 by CRC Press LLC 2 may be the first seismic design guideline based on the two-level performance design. The two level performance criteria adopted in ATC-32 were originally developed by the California Department of Transportation 5 . The first level of design concerns control of the performance of a bridge in earthquake events that have relatively small magnitude but may occur several times during

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