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（1 西南科技大學(xué)土木工程與建筑學(xué)院， 綿陽(yáng) 621010；2 工程材料與結(jié)構(gòu)沖擊振動(dòng)四川省重點(diǎn)實(shí)驗(yàn)室， 綿陽(yáng) 621010）

［摘要］為改善木柱軸心抗壓等受力性能，探索性地提出了一種新型預(yù)應(yīng)力薄壁鋼約束方木柱。對(duì)所提出的預(yù)應(yīng)力薄壁鋼約束方木柱進(jìn)行軸心抗壓性能試驗(yàn)，獲得其軸心抗壓強(qiáng)度、耗能性能、荷載-位移關(guān)系曲線(xiàn)和荷載-應(yīng)變關(guān)系曲線(xiàn)。試驗(yàn)結(jié)果表明，相對(duì)于純木柱，預(yù)應(yīng)力薄壁鋼約束方木柱的軸心抗壓強(qiáng)度和耗能性能等均得到了明顯提高，軸心抗壓強(qiáng)度相對(duì)于純木柱提高46.92%～55.27%，耗能性能提高125.3%～137.59%。最后根據(jù)已有研究成果及推導(dǎo)，提出了預(yù)應(yīng)力薄壁鋼約束方木柱軸心抗壓強(qiáng)度計(jì)算公式。

［關(guān)鍵詞］預(yù)應(yīng)力薄壁鋼； 方木柱； 軸心抗壓； 耗能性能

中圖分類(lèi)號(hào)：TU398+.6文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

*四川省科技廳應(yīng)用基礎(chǔ)研究項(xiàng)目（2019YJ0437）。

作者簡(jiǎn)介：王宇豪，碩士研究生，Email:596318628@qq.com; 通訊作者：劉德貴，博士，講師，Email: shll830520@163.com。