GB17741-2025

Evaluation of seismic safety for engineering sites

工程场地地震安全性评价

GB 17741-2025은(는) 현행 중국 강제 국가 표준입니다: Evaluation of seismic safety for engineering sites. 산업: 건설. 주제: 제품 안전. 시행일: 2025년 9월 1일.

적용 여부는 제품 범위, 인증 경로, 주관 당국 공고, 전환 규정에 따라 달라집니다. 컴플라이언스 판단에 사용하기 전에 번역을 의뢰하거나 공식 출처를 확인하세요.

컴플라이언스 개요

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적용 범위

This standard applies to the seismic safety evaluation for engineering sites, specifically utilized during project site selection, seismic fortification determination, and seismic disaster risk assessment. It is relevant for major engineering structures, linear engineering projects (such as pipelines, railways, and highways), and facilities requiring specific seismic hazard analysis. It is not applicable to general building constructions that strictly follow the national seismic zoning map without requiring site-specific evaluation. The standard references GB 18306 for seismic ground motion parameters.

기술 요구 사항

The standard classifies evaluation work into three grades (Grade I, II, and III) based on the project's seismic fortification targets and fault defense objectives. Grade I targets extremely rare ground motion parameters and capable fault identification, Grade II focuses on multi-probability ground motion and fault activity evaluation, and Grade III is dedicated to linear engineering projects. Engineers must determine the appropriate work grade to define the scope of their seismic hazard analysis. It mandates comprehensive seismic tectonic and fault activity evaluations across regional, near-field, and site-vicinity ranges. This includes identifying active faults, assessing capable faults capable of surface rupture, and evaluating regional seismotectonic conditions. Specific survey scales and investigation precisions are strictly tied to the determined work grade. The standard outlines requirements for seismic hazard analysis using both deterministic and probabilistic methods. It requires the establishment of ground motion prediction equations and the determination of seismic activity parameters. For Grade I, results from both deterministic and probabilistic methods must be enveloped to determine the final ground motion parameters. It also specifies the evaluation of seismic geological disasters, including fault dislocation, earthquake-induced soil liquefaction, soft soil seismic subsidence, and earthquake-triggered landslides or collapses. Engineers must assess these geohazards using the ground motion parameters derived from the site-specific analysis.

시험 방법

The standard involves several key testing and surveying methods, including borehole drilling for geotechnical conditions, in-situ wave velocity testing (measuring shear and compressive wave velocities), and dynamic property testing of rock and soil samples. It also mandates shallow seismic exploration and geological trenching for active fault detection, alongside remote sensing interpretation for fault activity analysis.

자주 묻는 질문

What types of engineering projects are regulated under GB 17741-2025?

The standard applies to engineering site selection, seismic fortification criteria determination, and seismic disaster risk assessment. It is crucial for major structures, linear engineering projects (such as pipelines and railways), and facilities requiring specific seismic safety evaluations in China.

Are there significant updates from the previous GB 17741-2005 version?

The 2025 version restructures the work grading criteria and introduces new requirements for fault activity evaluation near the site, seismic geological disaster assessment, and standardized evaluation reporting. It also removes regional seismic zoning and micro-zoning provisions found in the 2005 version.

How does GB 17741-2025 differ from international ISO seismic standards?

While GB 17741-2025 aligns with international seismic hazard analysis principles (using both deterministic and probabilistic methods), it is specifically tailored to China's seismic environment and regulatory framework. It integrates with Chinese seismic zoning maps (GB 18306) and local geotechnical investigation standards.

The summary above provides a high-level overview of GB 17741-2025. To ensure complete compliance for your engineering projects entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 17741-2025 today to access all detailed parameters, tables, and testing procedures.

적용 참고 사항

유형: 안전
CCS: P 15
ICS: 91.120.25
주관 부처: China Earthquake Administration
기술 위원회: National Technical Committee on Earthquake of Standardization Administration of China