| 引用本文: | 徐龙军,许昊,谢礼立.高幅值地震动参数及其潜在破坏势[J].哈尔滨工业大学学报,2013,45(10):7.DOI:10.11918/j.issn.0367-6234.2013.10.002 |
| XU Longjun,XU Hao,XIE Lili.Parameters and damage potential of large-amplitude ground motions[J].Journal of Harbin Institute of Technology,2013,45(10):7.DOI:10.11918/j.issn.0367-6234.2013.10.002 |
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| 高幅值地震动参数及其潜在破坏势 |
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徐龙军1,2, 许昊1,3, 谢礼立1,2
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(1.哈尔滨工业大学(威海) 土木工程系, 264209 山东 威海; 2.中国地震局工程力学研究所, 150080 哈尔滨; 3.伊利诺伊大学 厄本那-香槟分校 土木与环境工程系, 61801 厄本那)
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| 摘要: |
| 为研究高幅值地震动特性与影响,并针对该类地震动改进设计谱,统计了20次地震中60条满足PGA≥1 g、PGV≥100 cm／s、PGD≥100 cm三个条件之一的地震动记录,并计算相关参数．首先综合之前提出的与地震动特性相关的破坏势评价标准,采用因子分析法对各评价标准进行降维,得到新的综合因子,实现原始变量整合与简化,并对综合因子的物理意义给出解释．同时计算了高幅值地震动记录的特征周期和最大规准谱谱值,比较与现有规范给定值的差异,针对该类特殊地震动发生的可能性,为设计谱的完善提出建议． |
| 关键词: 特殊地震动 潜在破坏势 因子分析 设计谱 |
| DOI：10.11918/j.issn.0367-6234.2013.10.002 |
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| 基金项目:国家自然科学基金重大研究计划(91215301);国家自然科学基金重点面上项目(2,2). |
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| Parameters and damage potential of large-amplitude ground motions |
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XU Longjun1,2, XU Hao1,3, XIE Lili1,2
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（1. Department of Civil Engineering, Harbin Institute of Technology at Weihai, 264209 Weihai,Shandong, China; 2. Institute of Engineering Mechanics, China Earthquake Administration, 150080 Harbin, China; 3. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 61801 Urbana, USA）
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| Abstract: |
| To study the properties and effects of high-amplitude ground motion, while modifying the design spectra, 60 records from 20 events satisfying at least one of the following requirements: PGA≥1 g, PGV≥100 cm／s or PGD≥100 cm, were collected and analyzed. The evaluation factors for ground motions’ damage potential related with the ground motions’ characteristics were summarized and the Factor Analysis Method was used to realize the simplification and integration. Explanation of new factors’ physical meanings was also discussed. Additionally, characteristic periods and the maximum amplification coefficients for the large-amplitude ground motions were calculated and compared with those adopted in current design codes. Suggestions on the modification of design spectra were indicated based on the possibility of potential hazard. |
| Key words: special ground motion damage potential factor analysis method design spectra |
