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GB 17741-2025 English PDF

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GB 17741-2025: Evaluation of seismic safety for engineering sites
Status: Valid

GB 17741: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB 17741-2025English759 Add to Cart 6 days [Need to translate] Evaluation of seismic safety for engineering sites Valid GB 17741-2025
GB 17741-2005English389 Add to Cart 3 days [Need to translate] Evaluation of seismic safety for engineering sites Valid GB 17741-2005
GB 17741-1999English599 Add to Cart 4 days [Need to translate] Code for seismic safety evaluation of engineering sites Obsolete GB 17741-1999

PDF similar to GB 17741-2025


Standard similar to GB 17741-2025

GB/T 17742   DB/T 60   GB 50191   GB 17740   

Basic data

Standard ID GB 17741-2025 (GB17741-2025)
Description (Translated English) Evaluation of seismic safety for engineering sites
Sector / Industry National Standard
Classification of Chinese Standard P15
Classification of International Standard 91.120.25
Word Count Estimation 37,356
Date of Issue 2025-02-28
Date of Implementation 2025-09-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB 17741-2025: Evaluation of seismic safety for engineering sites

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 91.120.25 CCSP15 National Standard of the People's Republic of China Replaces GB 17741-2005 Seismic safety assessment of engineering sites Released on 2025-02-28 2025-09-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of contents

Preface V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Job Level and Job Content 3 4.1 Determination of work level 3 4.2 Determination of work content 3 4.3 Other requirements for evaluation work 4 5 Regional seismicity and seismotectonic assessment 4 5.1 Area scope and map scale 4 5.2 Regional seismicity 4 5.3 Regional earthquake structure 5 6 Near-field seismicity and seismotectonic evaluation 7 6.1 Near field range and map scale 7 6.2 Near-field seismicity 7 6.3 Near-field seismic structures 7 7 Evaluation of fault activity in the vicinity of the site 8 7.1 Site vicinity and map scale 8 7.2 Identification of fault activity in the vicinity of the site 8 7.3 Identification of active faults near the site 9 8 Earthquake engineering geological condition survey of the project site 9 8.1 Site engineering geological conditions investigation and scope 9 8.2 Drilling survey of site earthquake engineering geological conditions 9 8.3 Site rock and soil dynamic property test 10 8.4 Site active fault investigation 11 9 Determination of earthquake motion prediction equation 11 9.1 Earthquake Motion Prediction Equation Expression 11 9.2 Determination of bedrock ground motion prediction equations 12 10 Deterministic analysis of earthquake hazard 12 10.1 Establishment of earthquake source model for deterministic earthquake hazard analysis 12 10.2 Requirements for deterministic earthquake hazard calculations 12 10.3 Results of deterministic earthquake hazard analysis 12 11 Probabilistic analysis of earthquake risk 13 11.1 Probabilistic earthquake hazard analysis potential earthquake source area model 13 11.2 Division of earthquake statistical regions 13 11.3 Division of potential earthquake source areas 13 11.4 Determination of seismicity parameters 13 11.5 Calculation requirements for probabilistic earthquake hazard analysis 14 11.6 Results of probabilistic earthquake hazard analysis 15 12 Determination of site seismic parameters 16 12.1 Establishment of Site Seismic Response Analysis Model 16 12.2 Determination of input ground motion time history 16 12.3 Site Seismic Response Analysis 17 12.4 Determination of site seismic parameters 17 12.5 Determination of site seismic time history 18 13 Site Earthquake Geological Hazard Assessment 18 13.1 Fault slip assessment 18 13.2 Preliminary evaluation of earthquake liquefaction 19 13.3 Preliminary evaluation of soft soil subsidence 20 13.4 Preliminary Assessment of Earthquake Collapse and Landslides 20 14 Earthquake safety assessment report of the project site 21 14.1 Report Writing 21 14.2 Report Contents 21 Appendix A (Normative) Method for determining the target power spectrum that matches the target ground motion response spectrum 22 A.1 Basic Steps 22 A.2 Standard power spectrum calculation 22 A.3 Target Power Spectrum Calculation 22 Appendix B (Normative) Contents of the Seismic Safety Assessment Report for the Project Site 24 B.1 Introduction 24 B.2 Regional and near-field seismicity assessment 24 B.3 Regional seismic tectonic assessment 25 B.4 Near-field seismic tectonic evaluation 25 B.5 Assessment of fault activity in the vicinity of the site 26 B.6 Site active fault investigation 26 B.7 Identification of active faults in the vicinity of the site 26 B.8 Determination of earthquake motion prediction equations 26 B.9 Deterministic analysis of earthquake hazard 27 B.10 Probabilistic analysis of earthquake hazard 27 B.11 Survey of earthquake and engineering geological conditions at the project site 27 B.12 Site soil response analysis 28 B.13 Determination of site ground motion parameters 28 B.14 Site Seismic Geological Hazard Assessment 29 B.15 Conclusion 29 Reference 30

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB 17741-2005 "Evaluation of Seismic Safety of Engineering Sites". Compared with GB 17741-2005, in addition to structural adjustment and In addition to editorial changes, the main technical changes are as follows. --- Changed the classification of engineering site seismic safety assessment work, describing the determination of work level and work content (see 4.1, 4.2, Chapter 4 of the.2005 edition); --- Changed the requirements for regional seismic tectonic investigation and evaluation (see 5.3, 5.3 of the.2005 edition); --- Changed the requirements for identification of fault activity in the near field (see 6.3, 6.3 of the.2005 edition); --- Added the assessment of fault activity in the vicinity of the site (see Chapter 7); --- Changed the requirements for the survey of earthquake engineering geological conditions at the project site (see 8.1, 8.2, 8.3, 8.4,.2005 edition 7.1, 7.3, 12.6.2); --- Changed the content and calculation requirements of deterministic analysis of seismic hazard (see 10.1, 10.2, 10.3, 9.1, 9.2, 9.3 of the.2005 edition); --- Changed the contents and calculation requirements of earthquake hazard probability analysis (see 11.1, 11.2, 11.3, 11.4, 11.5, 11.6,.2005 edition 10.1, 10.2, 10.3, 10.4, 10.5, 10.6); --- Deleted "Regional seismic zoning", "small seismic zoning", "Seismic peak acceleration review" (see Chapter 11, Chapter.2005 of the.2005 edition) 13, 14); --- Changed the content and requirements for determining site seismic parameters (see 12.1, 12.2, 12.3, 12.4, 12.5, 12.1, 12.2, 12.3, 12.4, 12.5 of the.2005 edition) 12.2, 12.3, 12.4, 12.5); --- Added site earthquake geological hazard assessment (see Chapter 13); --- Added the seismic safety evaluation report of the project site (see Chapter 14); --- Added Appendix A to determine the target power spectrum that matches the target seismic response spectrum (see Appendix A); --- Added Appendix B Project Site Seismic Safety Assessment Report (see Appendix B). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the China Earthquake Administration. The previous versions of this document and the documents it replaces are as follows. ---First published in.1999 as GB 17741-1999 "Technical Specification for Seismic Safety Assessment of Engineering Sites"; ---First revised in.2005 as GB 17741-2005 "Evaluation of Seismic Safety of Engineering Sites"; ---This is the second revision. Seismic safety assessment of engineering sites

1 Scope

This document specifies the classification and content of the work of seismic safety assessment of engineering sites, regional and near-field seismic activity and earthquake Structural evaluation, fault activity evaluation near the site, seismic engineering geological condition survey of the project site, determination of earthquake motion prediction equations, The working rules and technical indicators of potential and probabilistic earthquake hazard analysis, site ground motion parameter determination, site earthquake geological hazard evaluation, and Requirements for writing earthquake safety assessment reports. This document is applicable to the project site selection, seismic fortification requirements, earthquake disaster risk assessment and other work involved in the project site. Earthquake safety assessment.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB 17740 Provisions on earthquake magnitude GB/T 18207 (all parts) Terminology for earthquake disaster prevention and reduction GB 18306 China Earthquake Motion Parameter Zoning Map GB/T 36072 Active fault detection GB/T 50011 Building seismic design standard GB 50021 Geotechnical Engineering Investigation Code GB/T 50269 Specification for testing dynamic characteristics of foundation JGJ83 Code for geotechnical engineering investigation in soft soil areas

3 Terms and definitions

The terms and definitions defined in GB 17740, GB/T 18207 (all parts), GB 18306, GB/T 36072 and the following terms and definitions apply to this document. 3.1 The probability that the project site will encounter an earthquake intensity value or ground motion parameter value greater than or equal to a given threshold. 3.2 Fault source faultsource In earthquake hazard analysis, the fault plane characterizes the areas where the earthquake source and rupture surface of the fault may be distributed in the future. 3.3 seismic belt A zone where seismic activity is closely related to seismic tectonic conditions. 3.4 A physical parameter that characterizes the ground motion caused by an earthquake.

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