基于有效翼缘内板筋影响的RC框架结构破坏机制分析  

Failure Mechanism Analysis of RC Frame Structure Based on Effective Flange Inner Plate Reinforcement

作　　者：罗水华 黄文颖 吴应雄[2] LUO Shuihua;HUANG Wenying;WU Yingxiong(College of Engineering,Fujian Jiangxia University,Fuzhou,Fujian 350108,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福建江夏学院工程学院,福建福州350108 [2]福州大学土木工程学院,福建福州350108

出　　处：《水利与建筑工程学报》2020年第1期169-174,共6页Journal of Water Resources and Architectural Engineering

基　　金：2017年福建省中青年教师教育科研项目(JAT170610);2018年福建省中青年教师教育科研项目(JT180574);国家自然科学基金资助项目(51778149)。

摘　　要：有效翼缘内楼板钢筋对梁端抗弯承载力的加强作用是现浇楼板影响"强柱弱梁"破坏机制实现的一个重要因素。为研究这一因素,运用OpenSEES有限元软件建立一个中间为走道的三跨5层RC框架结构,运用梁有效翼缘公式计入板中钢筋的抗弯作用,并优化结构节点配筋;最后对有限元模型输入不同地震作用,通过模型的位移响应判断结构安全性,通过分析梁柱出铰情况判断其破坏机制。结果表明结构实现了"强柱弱梁"破坏机制,在RC框架结构设计时可以结合梁有效翼缘公式计算板筋面积并调整梁柱节点配筋,对结构进行配筋优化。It is important to consider the potentiation of inner plate reinforcement on the beam’s bending capacity on cast-in-place reinforced concrete(RC) frame structure. In this paper, OpenSEES finite element software was adopted to analyze a three-span five-storied RC frame structure which was built by considering the effect of inner plate reinforcement within effective flange calculated by a formula. Finally, the structure’s displacement response was analyzed under the action of different seismic intensities to evaluate the safety of the structure. The failure mechanism of the structure was determined by analyzing the hinge of the beam and column. The results showed that the structure realized the failure mechanism of strong column-weak beam design. In the design of RC frame structure, the formula could be used to adjust the reinforcement of beam-column joints to optimize the reinforcement.

关 键 词：RC框架结构 强柱弱梁 梁有效翼缘宽度 OPENSEES 

分 类 号：TU312[建筑科学—结构工程]