深圳大学学报（理工版）
深圳大學學報（理工版）
심수대학학보（리공판）
JOURNAL OF SHENZHEN UNIVERSITY (SCIENCE & ENGINEERING)
2010年
1期
109-113
,共5页
结构工程%钢筋混凝土%砼梁桥%锈蚀疲劳%时变失效概率%蒙特卡洛法
結構工程%鋼觔混凝土%砼樑橋%鏽蝕疲勞%時變失效概率%矇特卡洛法
결구공정%강근혼응토%동량교%수식피로%시변실효개솔%몽특잡락법
structural engineering%reinforced concrete%reinforced concrete bridge%corrosion fatigue%limit state failure probability%Monte Carlo method
研究氯离子侵蚀、混凝土开裂和车辆荷载反复作用对钢筋混凝土梁桥结构抗力退化的影响,建立了砼梁桥在锈蚀疲劳作用下的结构抗力退化模型,采用蒙特卡洛法编写了相应的时变失效概率计算程序.以广东省某沿海砼简支梁桥为例,计算其时变失效概率,并预测其使用寿命.分析结果表明,在车流密集锈蚀-疲劳作用下,砼梁桥的时变失效概率远大于仅考虑锈蚀影响的时变失效概率,指出在分析砼梁桥可靠度时,应考虑车辆荷载反复作用对结构抗力退化的影响.
研究氯離子侵蝕、混凝土開裂和車輛荷載反複作用對鋼觔混凝土樑橋結構抗力退化的影響,建立瞭砼樑橋在鏽蝕疲勞作用下的結構抗力退化模型,採用矇特卡洛法編寫瞭相應的時變失效概率計算程序.以廣東省某沿海砼簡支樑橋為例,計算其時變失效概率,併預測其使用壽命.分析結果錶明,在車流密集鏽蝕-疲勞作用下,砼樑橋的時變失效概率遠大于僅攷慮鏽蝕影響的時變失效概率,指齣在分析砼樑橋可靠度時,應攷慮車輛荷載反複作用對結構抗力退化的影響.
연구록리자침식、혼응토개렬화차량하재반복작용대강근혼응토량교결구항력퇴화적영향,건립료동량교재수식피노작용하적결구항력퇴화모형,채용몽특잡락법편사료상응적시변실효개솔계산정서.이광동성모연해동간지량교위례,계산기시변실효개솔,병예측기사용수명.분석결과표명,재차류밀집수식-피노작용하,동량교적시변실효개솔원대우부고필수식영향적시변실효개솔,지출재분석동량교가고도시,응고필차량하재반복작용대결구항력퇴화적영향.
A probabilistic model is proposed to assess the resistance of reinforced concrete (RC) structures located in chloride-contaminated environment with the effects of cyclic traffic loads.Monte Carlo method was applied to find the ultimate limit state failure probability.The structural reliability of an existing simply supported bridge in Guangdong Province was evaluated with different load conditions.The results show that the expected service lifetime of RC bridges is greatly reduced due to the coupled corrosion fatigue effects.
