DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES - IISEE

12.6 Design of Members of Pier Foundations ................................................................. 70
Chapter 13 Verification of Sesmic Performance of Abutment
Foundations at Site Prone to Soil Liquefaction ........................ 71
13.1 General ..................................................................................................................... 71
13.2 Horizontal Seismic Coefficient for Performance Verification of Abutment
Foundations ............................................................................................................. 71
13.3 Calculation of Response Ductility Factor of Abutment Foundations .................... 71
13.4 Ductility Capacity of Abutment Foundations ......................................................... 71
13.5 Design of Members of Abutment Foundations ....................................................... 72
Chapter 14 Verification of Sesmic Performance of Superstructure ............ 73
14.1 General ..................................................................................................................... 73
14.2 Steel Superstructure ............................................................................................... 73
14.2.1 Strength and Displacement Capacity ........................................................... 73
14.2.2 Structural Details .......................................................................................... 73
14.3 Reinforced Concrete Superstructure ...................................................................... 74
14.3.1 Strength and Displacement Capacity ........................................................... 74
14.3.2 Structural Details .......................................................................................... 74
14.4 Ends of Superstructure ........................................................................................... 74
14.4.1 Gap between Two Adjacent Girders .............................................................. 74
14.4.2 Expansion Joints ............................................................................................ 76
14.4.3 Joint Protectors .............................................................................................. 77
Chapter 15 Verification of Sesmic Performance of Bearing Support
System ....................................................................................... 78
15.1 General ..................................................................................................................... 78
15.2 Design Seismic Force for Performance Verification of Bearing Support
System ...................................................................................................................... 78
15.3 Performance Verification of Bearing Support System ........................................... 80
15.4 Structural Details of Bearing Support System ...................................................... 81
15.5 Excessive Displacement Stopper ............................................................................ 81
Chapter 16 Unseating Prevention System .................................................. 83
16.1 General ..................................................................................................................... 83
16.2 Seat Length .............................................................................................................. 83
16.3 Unseating Prevention Structure ............................................................................. 85
16.4 Structure for Protecting Superstructure from Subsidence .................................... 86
16.5 Excessive Displacement Stopper ............................................................................ 87