ECC材料对框架结构地震损伤机制影响的研究  

Influence factors for seismic damage mechanism control of ECC frame

作　　者：陆婷婷 梁兴文[2] Lu Ting-ting;Liang Xing-wen(Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xijing University,Xi'an 710123,China;School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西京学院陕西省混凝土结构安全与耐久性重点实验室,陕西西安710123 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程抗震与加固改造》2021年第3期8-16,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51278402,51078305);西京学院高层次人才基金项目(XJ20B08)。

摘　　要：为进一步研究ECC材料对框架结构损伤机制的影响和机理,更好地实现对框架结构损伤机制的控制,本文对17个空间框架结构模型进行有限元分析。分析框架结构中梁、柱和板纵筋的应力和应变分布,研究ECC材料、柱梁抗弯承载力比以及柱轴压比对框架结构损伤机制、板参与梁抗弯程度的影响。结果显示,预期损伤部位采用ECC材料的框架结构,可以使梁纵筋更早地出现屈服,且增大了板受拉区顶部纵筋出现屈服的层间侧移角,控制板顶部纵筋参与梁抗弯的范围和钢筋应变增长,更有利于框架结构实现"强柱弱梁"的破坏机制。In order to investigate the influence of ECC on damage mechanism of frame structure,17 frame models are analyzed through simulation. The influences of the factors on frame structure damage mechanism and the contribution of slab to beam bearing capacity are studied. The results show that it made the longitudinal bars in beam yielded earlier to use ECC material. The drift corresponding to the bars yielding in slab is increased. The range of yielding bars in slab and the increasing of the bars stain are under control.Concequently,it makes the frame be prone to"strong column-weak beam"damage mechanism.

关 键 词：框架结构 纤维增强混凝土 损伤机制 控制 有限元分析 

分 类 号：TU375.4[建筑科学—结构工程]