【摘要】 采用等效体积单元法对采用外支脚手架方法加固的砌体结构在加固前、后抵抗地铁开挖过程中产生的爆破振动荷载的动力性能进行分析.通过分别建立加固前、后结构的模型并进行时程分析,对比顶点侧向位移和墙体的应力,得出采用外支脚手架的加固方法分担了墙体等构件的水平荷载,减小了结构的变形,避免了古建筑被损坏.为今后砌体古建筑的数值模拟和加固提供技术支持以及城市建设过程中由于地铁开挖所产生爆破振动对古建筑的影响提供分析实例.更多还原

【Abstract】 By using the method of representative volume element,the masonry structure’s dynamic quality of the blasting vibration effect before/after strengthened by scaffold during the process of constructing subway,is analyzed in this paper.By establishing the model of reinforced and unreinforced structure and comparing the points’ position and stress level,we get a result that method of using outside scaffold can reduce load of wall and distortion of structure,and furthermore avoid damage on old buildings,provide technique support to numerical simulation and examples to analysis of blasting vibration effect.更多还原