| 受腐蚀结构的抗震承载能力可靠度 |
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| 引用本文： | 仲伟秋,贡金鑫.受腐蚀结构的抗震承载能力可靠度[J].湖南科技大学学报(自然科学版),2003,18(1):41-43. |
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| 作者姓名： | 仲伟秋 贡金鑫 |
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| 作者单位： | 大连理工大学,土木工程系,辽宁大连,116023 |
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| 基金项目： | 国家自然科学基金项目资助(编号:50078009)，辽宁省科学技术基金资助(编号:001077) |
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| 摘 要： | 分析了腐蚀环境对结构抗力的影响、抗力衰减模型、地震危险性、地震对结构的作用.在描述地震发生的随机性时,采用了目前国内外广泛应用的泊松过程模型.用一个简化的结构抗力衰减模型,忽略了结构抗力变异系数随时间的变化.根据地震发生的随机性和结构抗力随时间变化的特点,提出了腐蚀环境下随机烈度和确定烈度地震时结构承载能力可靠度的分析方法.给出了在随机烈度和确定烈度地震作用下,受腐蚀结构承载能力失效的概率计算公式.算例分析表明,当结构处于严重腐蚀环境时,其地震作用下的承载能力可靠度有明显的降低.图2,参8.
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| 关 键 词： | 腐蚀 结构 抗震设计 承载能力 可靠度 |
| 文章编号： | 1000-9930(2003)01-0041-03 |
| 修稿时间： | 2002年3月5日 |
Reliability for load capacity of corroding earthquake resistant structures |
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| Abstract: | Influence of corrosive environment on structural resistance, resistance decrease model, seismic risk and seismic effect on structures are analyzed. When describing random of earthquake occurrence, Poisson's random process model applied widely home and abroad is adopted. A simplified resistance decrease model is adopted, neglecting change with time of resistance coefficient of variation. Based on the random of earthquake occurrence and the structural resistance change with time, the reliability analysis method for load capacity of corroding earthquake resistant structures is presented. Calculation formula of load capacity failure of corroding structures under seismic effect with random intensity and definite intensity are given. An example shows that the reliability for load capacity of structures decreases obviously when they are under severe corrosive environment.2figs.,8refs. |
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| Keywords: | corrosion structure earthquake resistant design load capacity reliability |
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