文章摘要
张玥,薛磊,陈帅,周敉.地震作用下高烈度区连续刚构桥参数敏感性分析[J].地震工程学报,2020,42(2):311-317. ZHANG Yue,XUE Lei,CHEN Shuai,ZHOU Mi.Parameter Sensitivity Analysis of Continuous Rigid-frame Bridgesin High Seismic Intensity Regions under Seismic Action[J].China Earthquake Engineering Journal,2020,42(2):311-317.
地震作用下高烈度区连续刚构桥参数敏感性分析
Parameter Sensitivity Analysis of Continuous Rigid-frame Bridgesin High Seismic Intensity Regions under Seismic Action
投稿时间:2019-07-05  
DOI:10.3969/j.issn.1000-0844.2020.02.311
中文关键词: 刚构桥;正交数值试验;边中跨比;敏感性
英文关键词: rigid-frame bridge;orthogonal numerical experiment;side span-to-central span ratio;sensitivity
基金项目:陕西省重点研发计划项目(2018SF-359);陕西省创新人才推进计划-科技创新团队(2018-TD-040);旧桥检测与加固技术交通运输行业重点实验室(长安大学)开放基金(300102210513)
作者单位E-mail
张玥 西安科技大学 建筑与土木工程学院, 陕西 西安 710054  
薛磊 西安科技大学 建筑与土木工程学院, 陕西 西安 710054  
陈帅 苏交科集团股份有限公司, 江苏 南京 210017  
周敉 长安大学 桥梁与隧道陕西省重点实验室, 陕西 西安 710054 zhoumi@chd.edu.cn 
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中文摘要:
      大跨连续刚构桥的参数变化对其地震响应影响较大,为了进一步研究地震作用下刚构桥各参数变化对桥梁内力的影响,以一连续刚构桥为例,采用正交数值试验的方法,以主梁跨中横桥向弯矩、墩顶顺桥向弯矩、墩底顺桥向弯矩及墩底横桥向弯矩为考核指标,分析地震作用下结构参数(边中跨比、梁底幂次、墩高比)的变化对桥梁内力的影响规律及其参数敏感性。研究结果表明:对于跨中横桥向弯矩,墩高比对其影响较大,墩高比的增加可使弯矩值最大增加28%;对于墩顶顺桥向弯矩、墩底顺桥向弯矩以及墩底横桥向弯矩,边中跨比对其影响较大,边中跨比的增加可使弯矩值最大分别增加51%、55%和52%。高烈度区的桥梁设计应重视边中跨比及墩高比的选择。
英文摘要:
      The seismic response of long-span, continuous rigid-frame bridges is greatly affected by a parameter change. To further study the influence of various parameters of rigid-frame bridges on the internal force of the bridge under the action of an earthquake, the orthogonal numerical test method was adopted with a continuous rigid-frame bridge as an example. The transverse bending moment at the middle span of the main beam, the longitudinal bending moment at the pier top and bottom, and the transverse bending moment at the pier bottom were taken as the evaluation indices. The influence law of structural parameters (side span-to-central span ratio, power of beam bottom, pier height ratio) on the internal force of the bridge under seismic action, and the parameter sensitivity were analyzed. Results indicated that the pier height ratio had a great influence on the mid-span transverse bending moment. Additionally, it was observed that with the rise in pier height ratio, the maximum bending moment value increased by 28%. The side span-to-central span ratio had a large influence on both the longitudinal bending moment at the pier top and bottom and the transverse bending moment at the pier bottom, and with the increase of side span-to-central span ratio, the maximum value of the bending moment increased by 51%, 55%, and 52%, respectively. Bridge design in high-intensity areas should pay close attention to the choice of side span-to-central span ratio and pier height ratio.
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