桥梁抗震挡块拟静力试验研究

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英文篇名：Quasi-static Test Research on Seismic Blocks of Bridges 中文刊名：公路交通技术 英文刊名：Technology of Highway and Transport 作者：郑万山 ; 唐光武 英文作者：ZHENG Wanshan ; TANG Guangwu 中文关键词：桥梁挡块 ; 抗震性能 ; 模型试验 ; 计算公式 英文关键词：bridge block ; seismic property ; model test ; calculation formula 出版日期：2013-08-25 机构：桥梁工程结构动力学国家重点实验室; 年：2013 期：04 出版单位：公路交通技术

摘要

通过5个桥梁横向挡块在低周反复荷载下的试验,研究不同箍筋形式、不同厚度和不同撞击高度的桥梁横向挡块的抗震性能。结果表明,采用非封闭箍筋挡块时,其延性能力明显差于采用封闭箍筋挡块;采用封闭箍筋挡块时,其挡块破坏主要表现为弯剪破坏模式,且其承载能力随着厚度的增加而增加。根据挡块的破坏机理,提出挡块抗震能力计算公式。
Based on the test of 5 lateral blocks of bridges under low cyclic loads,this paper probes into seismic properties of lateral blocks of bridges in different stirrup forms,different thicknesses and different impact heights.The results show that the ductility ability of non-closed stirrup blocks when employed is obviously inferior to closed stirrup blocks;when closed stirrup blocks are adopted,the damages to blocks mainly manifest bending and shearing failures,and their bearing capacity increases with thickness.The paper also proposes calculating formula for seismic capability of blocks in accordance with failure mechanism of blocks.

引文

[1]王东升,王吉英,孙治国,等.汶川大地震简支梁桥落梁震害与设计对策[J].防灾减灾工程学报,2011,31(5):595-601.
    [2]Kaneko Y,Connor J J,Thanassis T C.Fracture MechanicsApproach for Failure of Concrete Shear Key I:Theory[J].Journal of Engineering Mechanics,1993,119(4):681-700.
    [3]Megally S H.Seismic response of sacrificial shear keys inbridge abutments[R].California:Caltrans,2002.
    [4]Goel R K,Chopra A K.Role of Shear Keys in SeismicBehavior of Bridges Crossing Fault-Rupture Zones[J].Bridge Engeering,2008,13(4):398-408.
    [5]Mattock A H,Hawkins N M.Research on shear transferin reinforced concrete[J].PCI Journal,1972,17(2):55-75.
    [6]Kaneko Y,Connor J J,Thanassis T C.Shear Keys:Fracture Shear Key:II Verification[J]Journal ofMechanics Approach for Failure of Concrete EngineeringMechanics,1993,119(4):700-719.