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1、Trade Standard of the Peoples Republic of ChinaJTJJTJ 044-89Anti-seismic Design Code for Highway EngineeringIssued on 01-01-1990Implemented on 01-01-1990Issued by the Ministry of Communications ofthe Peoples Republic of ChinaContents1General Rules12Route, Bridge Site, Tunnel Site and Foundation32.1.
2、Route, Bridge site and Tunnel Site32.2.Foundation53.Subgrade and Retaining Wall93.1.Checking calculations of anti-seismic strength and stability93.2.Anti-seismic measures124Bridges144.1.General rules144.2.Seismic load154.3.Checking Calculations of Anti-seismic Strength and Stability314.4.Anti-seismi
3、c measures34Chapter 5Tunnels405.1.General Rules405.2.Checking Calculations of Anti-seismic Strength and Stability405.3.Anti-seismic measures42Appendix 1Approximate Formulas for Fundamental Period of Beam Bridge Piers44Appendix 2Approximate Calculation Formula for Fundamental Period of Beam Bridges w
4、ith Laminated Rubber Bearings46Appendix 3Approximate Calculation Formulas for Fundamental Period of Single-span Arch Bridges47Appendix 4Approximate Calculation Formula for Natural Vibration Period of Multiple-arch Bridges49Appendix 5Table of Seismic Internal Force Coefficient for Arch Bridges52Appen
5、dix 6 Method of Determination of Dynamic Magnification Coefficient According to Site Assessment Index 57Appendix 7Explanation of Terminology of this Code59Appendix 8Wording Explanation of the Code60Anti-seismic Design Code for Highway EngineeringJTJ044-89 Execution on January 1st, 1990 Basic Symbols
6、Actions and their effects-Horizontal seismic load acting at the center of gravity of calculated subgrade soil mass-Horizontal seismic load acting at the center of gravity of wall body above section i-Horizontal seismic load acting at mass point i of a beam bridge pier -Horizontal seismic load genera
7、ted on the top surface of laminated rubber bearings on pier i by superstructure-Horizontal seismic load generated by pier body-Summation of horizontal seismic loads generated on the top surface of one or several laminated rubber bearings by superstructure-Horizontal seismic load acting at the center
8、 of gravity of abutment body-Active soil pressure acting over every linear meter of abutment back in case of an earthquake-Longitudinal horizontal concentrated force acting on pier top-Longitudinal horizontal seismic load distributed around pier body-Transverse horizontal concentrated force acting o
9、n pier top-Bending moment, shear force or torsional moment caused at arch foot, arch crown and 1/4 arch span sections by transverse horizontal seismic load uniformly distributed along arch rings of an equal-span multiple-arch bridge-Horizontal seismic load acting on any of mass points on tunnel lini
10、ng and open cut tunnels-Gravity of calculated soil mass of subgrade-Gravity of wall body masonry above section i-Gravity of pier body segments-Converted mass point gravity on the top surface of bearingsGap-Gravity of superstructure-Gravity of beam caps-Gravity of pier body-Converted mass point gravi
11、ty of piers to the top surface of laminated rubber bearings-Gravity of abutment body above the top surface of foundation-Average gravity over unit arc length of arch rings, including structures on top of arches-Concentrated gravity on the top of pier i-Total gravity of superstructures of a one-span
12、arch bridge-Gravity over each linear meter of pier body-Total hydrodynamic pressure acting on piers at 1/2 height of water depth in case of an earthquake-Longitudinal horizontal seismic load acting on fixed bearings-Transverse horizontal seismic load acting on fixed bearings and freely movable beari
13、ngs-Longitudinal or transverse horizontal seismic load acting on rubber bearings-Bending moment, shear force or axial force caused at arch foot, arch crown and 1/4 arch span section by vertical seismic load arising from longitudinal horizontal seismic motion of a single-span arch bridge-Variable mom
14、ent, shear or axial force caused at arch foot, arch crown and 1/4 arch span cross section by horizontal seismic load arising from longitudinal horizontal seismic motion of a single-span arch bridge-Bending moment, shear force or torsion moment caused at arch foot, arch crown and 1/4 arch span sectio
15、n by horizontal seismic load arising from transverse horizontal seismic motion of a single-span arch bridge-Total seismic internal force of arch rings of an equal-span multiple-arch bridge-Total seismic internal force of pier bodies of an equal-span multiple-arch bridge-Relative horizontal displacement of a beam bridge pier at the center of gravity of segment i in the fundamental mode-Ratio of horizontal displacement caused at general scouring line or on the top surface of foundation by unit horizontal force longitudinally a
