瓦楞纸板方管柱力学性能与压溃模式研究

Mechanical Properties and Crushing Mode of Corrugated Cardboard Square Tubular Columns

中文关键词:  瓦楞纸板  方管柱  准静态压缩  压溃模式  约束设计

英文关键词:corrugated cardboard  square tubular column  quasi-static compression  crushing mode  constraint design

中文摘要:

      目的 研究不同构造瓦楞纸板方管柱在准静态轴向荷载作用下的力学性能和破坏模式，获得综合性能最优构造方案。方法 通过改变瓦楞纸板方管柱构造方向和层数，设计制作4种构造形式的瓦楞纸板方管柱，通过开展轴向荷载作用下的静载荷试验，系统研究典型构造瓦楞纸板方管柱的力学性能和破坏模式。结果 获得了4种构造形式瓦楞纸板方管柱载荷-位移曲线、分阶段变形破坏形态和试验关键参数。竖向瓦楞纸板方管柱呈现2种变形模式，平台阶段为体现瓦楞板叠层压缩小变形特征的塑性坍塌渐进屈曲模式，压溃阶段为体现薄壁管凹凸大变形特征的塑性坍塌渐进屈曲模式，破坏阶段呈现明显的脆性特征。横向瓦楞管柱呈现稳定的锯齿形塑性坍塌渐进屈曲模式。双层瓦楞管柱在压缩过程中会发生相互作用，脆性破坏特征减弱。外横内竖瓦楞管柱构件整体压溃模式稳定，呈现塑性破坏特征。结论 瓦楞纸板方管柱的力学性能和破坏模式与构造形式有关，外横内竖瓦楞纸板方管柱融入了约束设计和导向设计理念，其力学性能优越。

英文摘要:

      The work aims to study the mechanical properties and failure modes of corrugated cardboard square tubular columns with different structures under quasi-static axial loads, and to obtain an optimal structural scheme for comprehensive performance. By changing the structural direction and the number of layers of corrugated cardboard square tubular columns, four structural forms of corrugated cardboard square tubular columns were designed and manufactured. By carrying out an experimental study of static load under axial load, the deformation and failure modes of corrugated cardboard square tubular columns of typical structures were systematically studied. The load-displacement curves, staged deformation and failure modes and key parameters of the four structural forms of corrugated cardboard square tubular columns were obtained. There were two buckling modes of the vertical corrugated square tubular columns. The small deformation plastic collapse progressive buckling mode was consistent with the corrugated cardboard buckling mode in the plateau phase, and the large deformation plastic collapse progressive buckling mode was consistent with the thin-walled tube buckling mode in the crushing phase. Obvious brittle characteristics were showed in the failure stage. The transverse corrugated columns exhibited stable accordion-like deformation and plastic collapse progressive buckling patterns. The double-layer corrugated columns interacted during compression, and the brittle failure characteristics were weakened. The overall collapse mode of the components was stable in the outer-horizontal and inner-vertical columns, and the characteristics of plastic failure were showed. The mechanical properties and failure modes of corrugated cardboard square columns are related to the structural form. The outer-horizontal and inner-vertical columns are integrated with the constraint design and guiding design concepts, and have superior mechanical properties.