生土结构预应力加固抗震试验研究  

EXPERIMENTAL STUDY ON EARTHQUAKE RESISTANCE OF PRESTRESSED REINFORCED RAW-SOIL STRUCTURE

作　　者：高幸 王维玉 GAO Xing;WANG Wei-yu(The State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;Research Institute of Architecture Science of Hebei,Shijiazhuang,Hebei 050021,China)

机构地区：[1]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024 [2]河北省建筑科学研究院,河北石家庄050021

出　　处：《工程力学》2021年第S01期237-242,共6页Engineering Mechanics

基　　金：河北省建设厅项目(2018-2010)。

摘　　要：生土结构预应力加固技术是针对碹窑结构缺陷提出的新型抗震加固技术。预应力加固主要分为预应力穿墙螺栓拉结、预应力钢拱圈支撑和预应力钢绞线拉结3大类型。对加固后的碹窑进行原位爆破试验,试验结果表明:预应力加固结构体系对窑身y方向的抗震性能提升显著;预应力穿墙螺栓在爆破激励下对窑脸起到明显的拉结作用;碹窑内部门洞处应力集中,加固设计时应重点关注。该加固技术适合在碹窑民居危房加固改造项目中推广应用,具有重要的科学理论价值、现实意义与应用前景。The prestressed reinforcement technology of raw-soil structure is a new aseismic reinforcement technology for the defects of arch kiln structure.The prestressed reinforcement technology is mainly divided into three types:prestressing wall piercing bolt,prestressing steel arch ring and prestressing steel strand.In situ blasting test of reinforced arch kiln structure shows that the seismic performance of the arch kiln in y direction is improved more significantly.The prestressed wall piercing bolt plays an obvious role in drawing the kiln face under the blasting excitation.The stress concentration in the side doors of arch kiln should be paid more attention in reinforcement design.The reinforcement technology can be promoted and applied in the reinforcement and reconstruction project of dilapidated houses.The technology has important scientific theoretical value,practical significance and application prospects.

关 键 词：生土结构 预应力加固 抗震性能 爆破 动力放大系数 

分 类 号：TU398.2[建筑科学—结构工程]