基于RVE方法的喷射混凝土加固多层砌体结构抗震性能分析  

Seismic Analysis of Multilayer Masonry Structure Strengthened with Shotcrete Using RVE

作　　者：梁城宇[1,2] 车轶[1] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]顺德建筑设计院有限公司,广东佛山528300

出　　处：《工程抗震与加固改造》2011年第6期12-17,33,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：973计划项目-城市工程的地震破坏与控制(2007CB714200)

摘　　要：采用砌体等效体积单元方法对喷射混凝土加固后的多层砌体房屋抗震性能进行了分析。分别建立了原有结构和加固结构的有限元分析模型并进行了时程分析。探讨了喷射混凝土加固方法对结构周期、侧向刚度以及墙体应力水平的影响。研究表明,采用喷射混凝土加固方法能够有效地提高结构刚度、增强结构的抗震性能。喷射混凝土面层承担了大部分的墙体地震剪力,因此降低了原有砌体墙体的应力水平,避免了墙体的破坏。The seismic behavior of a multistory masonry building strengthened with shotcrete is analyzed using representative volume element model.Finite element models for both the original structure and the strengthened one are established,and time-history analysis is performed.The effect of shotcrete strengthening on masonry walls on the structural period,structural stiffness,and stress level in the masonry walls is investigated by the analysis.The result shows that the structural stiffness is effectively enhanced and seismic behavior of the structure is improved by the strengthening of shotcrete.Since the major portion of the seismic shear force in the strengthened wall is resisted by the strengthening concrete layer,the stresses in the masonry wall are reduced and the structural failure is avoided.

关 键 词：等效体积单元 喷射混凝土 砌体结构 抗震性能 

分 类 号：TU364[建筑科学—结构工程] TU352.11