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首页> 外文期刊>Mathematical Problems in Engineering >Mechanical Characteristics of Fully Grouted and Antiseismic Bolts considering Transverse Deformation in Underground Caverns
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Mechanical Characteristics of Fully Grouted and Antiseismic Bolts considering Transverse Deformation in Underground Caverns

机译：考虑地下洞穴横向变形的完全灌浆和抗白螺栓的机械特性

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摘要

The load transfer control equations under bolt-surrounding rock interaction are established on the basis of classical beam theory and the trilinear shear slip model. The axial stress and transverse shear force distributions of the anchorage body are obtained by solving the equations. The equivalent forces obtained by the transverse force and axial shear stress of the bolts are applied to rock mass elements to simulate the support effect. A new dynamic algorithm for bolts is proposed in considering of the axial and transverse deformation of the anchorage body. The rationality of the algorithm is verified by comparing with laboratory pullout and shear tests of bolts. A dynamic time-history case study of underground caverns is conducted using this algorithm. Results indicate that (1) the algorithm may reflect the stress and deformation characteristics of bolts during an earthquake; (2) for the antiseismic support effect of the surrounding rock at fault, the bolt algorithm in this study is more valid than the algorithm that considered only the axial deformation of bolts; (3) in the support force of the bolt to the surrounding rock, transverse force is the key to limit fault dislocation and reduce the dynamic damage of the rock at fault.
机译：基于经典光束理论和三轴剪切滑动模型建立螺栓环岩相互作用下的负载传输控制方程。通过求解方程来获得锚固体的轴向应力和横向剪切力分布。通过螺栓的横向力和轴向剪切应力获得的等效力施加到岩体质量元件以模拟支撑效果。考虑到锚固体的轴向和横向变形，提出了一种新的螺栓动态算法。通过与螺栓的实验室拔出和剪切试验相比，验证了算法的合理性。使用该算法进行了地下洞穴的动态时间历史案例研究。结果表明（1）算法可以反映地震期间螺栓的应力和变形特性; （2）对于周围岩石的抗震支撑效果故障，本研究中的螺栓算法比仅考虑螺栓的轴向变形的算法更有效; （3）在螺栓到周围岩石的支撑力中，横向力是限制故障位错的关键，降低岩石的动态损坏。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第22期|3762680.1-3762680.15|共15页
  • 作者

    Yang Buyun; Xiao Ming; Liu Guoqing; Chen Juntao;

  • 作者单位

    Wuhan Univ State Key Lab Water Resources & Hydropower Engn S Wuhan 430072 Peoples R China|Wuhan Univ Key Lab Rock Mech Hydraul Struct Engn Minist Educ Wuhan 430072 Peoples R China;

    Wuhan Univ State Key Lab Water Resources & Hydropower Engn S Wuhan 430072 Peoples R China|Wuhan Univ Key Lab Rock Mech Hydraul Struct Engn Minist Educ Wuhan 430072 Peoples R China;

    China Inst Water Resources & Hydropower Res Beijing 100048 Peoples R China;

    Wuhan Univ State Key Lab Water Resources & Hydropower Engn S Wuhan 430072 Peoples R China|Wuhan Univ Key Lab Rock Mech Hydraul Struct Engn Minist Educ Wuhan 430072 Peoples R China;

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