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DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES - IISEE

DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES - IISEE

DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES - IISEE

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Chapter 1 General<br />

1.1 Scope<br />

This Part shall apply to the seismic design of highway bridges.<br />

1.2 Definition of Terms<br />

The terms used in this part are defined as below:<br />

(1) Seismic performance<br />

Performance of bridges subjected to the effects of earthquakes.<br />

(2) Limit state<br />

Limit state of a whole bridge and each structural member capable of meeting the<br />

requirements of seismic performance.<br />

(3) Liquefaction<br />

Phenomenon of destruction of a soil layer when a saturated sandy soil loses its<br />

shear strength due to a sudden rise of pore water pressure caused by earthquake<br />

ground motion.<br />

(4) Liquefaction-induced ground flow<br />

Phenomenon of the ground moving laterally due to liquefaction.<br />

(5) Ground type for seismic design<br />

Type of ground for engineering purpose, classified depending on its dynamic<br />

characteristics during an earthquake.<br />

(6) Ground surface to be considered in seismic design<br />

Ground surface assumed for seismic design.<br />

(7) Bedrock for seismic design<br />

Upper surface of a fully hard ground layer that exists over a wide area in the<br />

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