（1 西南科技大学土木工程与建筑学院， 绵阳 621010；2 工程材料与结构冲击振动四川省重点实验室， 绵阳 621010）

［摘要］为改善木柱轴心抗压等受力性能，探索性地提出了一种新型预应力薄壁钢约束方木柱。对所提出的预应力薄壁钢约束方木柱进行轴心抗压性能试验，获得其轴心抗压强度、耗能性能、荷载-位移关系曲线和荷载-应变关系曲线。试验结果表明，相对于纯木柱，预应力薄壁钢约束方木柱的轴心抗压强度和耗能性能等均得到了明显提高，轴心抗压强度相对于纯木柱提高46.92%～55.27%，耗能性能提高125.3%～137.59%。最后根据已有研究成果及推导，提出了预应力薄壁钢约束方木柱轴心抗压强度计算公式。

［关键词］预应力薄壁钢； 方木柱； 轴心抗压； 耗能性能

中图分类号：TU398+.6文献标识码：A文章编号：1002-848X(2020)15-0042-05

Experimental study on the axial compression of a new type of prestressed thin-walled steel constrained square timber column

WANG Yuhao1, LIU Degui1,2, LI Jianchun1, MA Jingjing1

(1 School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China；2 Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province， Mianyang 621010, China）

Abstract:In order to improve the axial compression mechanical properties of timber columns，a new type of prestressed thin-wall steel constrained square timber column was proposed tentatively.The axial compression experiments were conducted for the new type of prestressed thin-wall steel constrained square timber column, and the axial compression strength, the energy dissipation capacity，load-displacement relation curve and load-strain relation curve were obtained. The experimental results show that the axial compression strength and energy dissipation capacity of the new type of prestressed thin-wall steel constrained square timber column were significantly improved by comparing with the pure timber square column, the axial compression strength has increased by 46.92%～55.27%, the energy dissipation capacity has increased by 125.3%～137.59%. Finally, based on the existed research results and derivation, a simplified formula was proposed for calculating axial compression bearing capacity of the new type of prestressed thin-wall steel constrained square timber column.

Keywords:prestress thin-wall steel；  square timber column; axis compression; energy dissipation capacity

*四川省科技厅应用基础研究项目（2019YJ0437）。

作者简介：王宇豪，硕士研究生，Email:596318628@qq.com; 通讯作者：刘德贵，博士，讲师，Email: shll830520@163.com。