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支撑横梁体系钢板组合梁桥抗震有限元建模方法研究 被引量:2
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作者 何小文 《工程与建设》 2018年第4期550-554,共5页
为探究新型支撑横梁体系钢板组合梁桥合理、便捷、高效的抗震设计建模方法,采用SAP2000分别建立了精细化、局部精细化和杆系抗震有限元模型。在此基础上进行动力特性和地震响应分析,获得了三种抗震有限元模型的适用范围,为支撑横梁体系... 为探究新型支撑横梁体系钢板组合梁桥合理、便捷、高效的抗震设计建模方法,采用SAP2000分别建立了精细化、局部精细化和杆系抗震有限元模型。在此基础上进行动力特性和地震响应分析,获得了三种抗震有限元模型的适用范围,为支撑横梁体系钢板组合梁的抗震研究提供建模参考。 展开更多
关键词 支撑横梁体系钢板组合梁 抗震有限元模型 动力特性分析 地震响应分析
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全体外预应力节段拼装轻型薄壁箱梁桥抗震建模方法研究 被引量:1
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作者 马乙一 《工程与建设》 2017年第4期487-489,共3页
芜湖长江公路二桥引桥采用的全体外预应力节段拼装轻型薄壁箱梁结构新颖复杂,一些特殊构件会对桥梁结构的动力特性、地震响应规律、震害机理等产生重要影响,故提出了该类桥梁的精细化抗震建模方法,对体外预应力束、节段拼装接缝、转向... 芜湖长江公路二桥引桥采用的全体外预应力节段拼装轻型薄壁箱梁结构新颖复杂,一些特殊构件会对桥梁结构的动力特性、地震响应规律、震害机理等产生重要影响,故提出了该类桥梁的精细化抗震建模方法,对体外预应力束、节段拼装接缝、转向块和横隔板等重要构件进行合理的有限元模拟,并与抗震杆系模型和现场实桥动力特性试验结果进行了对比验证,说明了精细化模型的优越性。 展开更多
关键词 桥梁抗震 全体外预应力 节段拼装 薄壁箱梁 精细化抗震有限元模型
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Dry Stone Masonry Ductility During an Earthquake
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作者 Antonio Morais 《Chinese Business Review》 2017年第6期303-307,共5页
Stone structures with dry joints, that is, without mortar, have shown a surprising behavior when earthquakes occur. An example of this behavior is the perennially of the so-called Inca wall in Peru, which despite havi... Stone structures with dry joints, that is, without mortar, have shown a surprising behavior when earthquakes occur. An example of this behavior is the perennially of the so-called Inca wall in Peru, which despite having suffered several earthquakes over time has remained stable without collapsing. This article presents the research carried out on stone masonry wails with dry joint, without mortar, subject to a seismic action. In order to understand the behavior of the masonry without mortar, it designs a Grid mode/ of Finite Elements. From the results, it is concluded that these walls with a certain thickness have ductility that allows them to withstand high displacement and rotation values, thus accommodating the movement of the earth subject to an earthquake. The individual stone blocks move relative to each other through rotations and displacements, which are processed in the free joints of any mortar. The joints work as energy sinks. The free movements in the joints dissipate the energy transmitted by the earthquake, not causing in this way the rupture of the stone blocks. The goal of this article is to understand the p importance of lack of mortar in the seismic behavior of the mansonry. 展开更多
关键词 dry masonry masonry structural performance numerical models resistant parameters earthquakebehavior seismic resistance
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