基于地震均匀损伤的RC框架结构新型侧向力模式
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重庆大学 山地城镇建设与新技术教育部重点实验室

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TU201.1

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国家自然科学基金(51608073,51978109)第一/通讯作者:白久林,男,博士,副教授,博士生导师,1985年9月生。


A new lateral force pattern of reinforced concrete frame structures based on seismic uniform damage
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Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing

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    摘要:

    结构在强震下形成均匀损伤状态时,各楼层的侧向变形近似、损伤大小相同,各部位的材料性能均得到了充分发挥,易于形成整体化的耗能机制。基于优化准则法,考虑结构整体损伤和局部损伤,本文首先构建了RC框架结构地震均匀损伤优化设计程序。基于非线性温克尔地基梁模型(BNWF),建立了能够考虑土-结构相互作用的RC框架结构分析模型。以三个5层、8层和12层结构为例,对其进行了均匀损伤优化设计和关键收敛参数分析。基于三个均匀损伤优化设计结构的层剪力分布,以我国抗震规范的侧力模式为基础,提出了新型的侧向力模式。本文所形成的均匀损伤优化设计方法、新型侧向力模式,可为我国RC框架的抗震设计提供依据和参考。

    Abstract:

    When the uniform damage state of structures is developed under strong earthquakes, each story has an approximately equal story drift ratio and damage, and the material potential of each parts is fully exploited, which makes for the global energy dissipation mechanism. By considering the global and local damage, the optimization design procedure of reinforced concrete frame structures is constructed based on the optimality criteria method. The analytical model considering the soil-structure-interaction is developed based on the Beam on Nonlinear Winkler Foundation (BNWF) model. Three 5-, 8- and 12-story reinforced concrete (RC) frame structures were employed as the prototype structures. The uniform damage optimization design was performed and the main convergence parameters were analyzed. According to the story shear distribution of three optimized RC frames, a new lateral force pattern was proposed using the format of Chinese seismic design code. The developed uniform damage optimization design and new lateral force pattern, can provide a basis and reference for seismic design of RC frame structures in China.

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  • 收稿日期:2020-03-08
  • 最后修改日期:2020-04-06
  • 录用日期:2020-04-07
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