框架边主梁弹性阶段受扭的计算分析

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英文篇名：Elastic analysis for torsion performance of frame spandrel beams 作者：田炜 ; 邬喆华 ; 卢旦 ; 徐晓珂 英文作者：Tian Wei;Wu Zhehua;Lu Dan;Xu Xiaoke;East China Architectural Design & Research Institute Co., Ltd.;Shanghai Assembly Building Technology Integration Engineering Technology Research Center;Ningbo Institute of Technology, Zhejiang University; 关键词：边梁 ; 框架 ; 结构性能 ; 扭矩 ; 扭转角 英文关键词：spandrel beam;;frame;;structural performance;;torque;;torsion angle 中文刊名：JCJG 英文刊名：Building Structure 机构：华东建筑设计研究院有限公司;上海装配式建筑技术集成工程技术研究中心;浙江大学宁波理工学院; 出版日期：2019-04-15 出版单位：建筑结构 年：2019 期：v.49 基金：住宅建筑工业化产业技术研发与示范(2015011 号);; 宁波市自然科学基金项目(2017A610316) 语种：中文; 页：JCJG2019S1137 页数：5 CN：S1 ISSN：11-2833/TU 分类号：675-679

摘要

采用有限元数值方法,建立了带框架边主梁结构的计算模型。通过对边主梁扭转角的无量纲分析来反映周边构件(次梁、柱、板)对其受扭的影响,考虑了矩形截面梁的翘曲效应,探讨了边主梁抗弯刚度(抗扭刚度)、截面形式、现浇板厚、与次梁相交点位置等设计参数对受扭效应的作用。结合工程算例分析表明,边主梁扭矩与扭转角存在耦合反比关系,其值随边主梁抗弯刚度增强而增大。在大跨空间结构中,按线弹性计算的扭矩难以满足边主梁抗扭性能的设计要求,设置斜撑可以得到有效减小。
        Applying the finite element numerical method, a calculated model was established to study on torsion performance of frame spandrel beams. Through the dimensionless analysis of the corresponding torsion angle, the effects of the surrounding components which include secondary beams, columns and slabs on the torsional performance was acquired. Considering the warping effect of rectangular cross-section beam, the effects of the design parameters such as the beam bending stiffness(torsional stiffness), cross-section form, slab thick, and the intersection position of beams on the torsional performance were discussed. Combined with the engineering example, it is shown that there is a coupling relationship between the torque and the torsion angle of the side main beam. The torsional moment increases with the strengthening of the bending stiffness of the main beam. In the large span space structure, the torque calculated by line elasticity is difficult to meet the design requirements of the torsional behavior of the main beam. It is suggested that the setting of the inclined bracing can be effectively reduced.

引文

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