| 角钢?集成材L形组合柱的受压性能研究 |
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| 作者姓名： | 李威 高颖 孟鑫淼 胡祺斌 邱雅琴 |
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| 作者单位： | 北京林业大学材料科学与技术学院,木材科学与工程北京市重点实验室,木质材料科学与应用教育部重点实验室,北京 100083;北京林业大学土木工程系,北京 100083 |
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| 基金项目： | 国家重点研发计划(2017YFC0703503);国家自然科学基金(31770602);北京市支持中央在京高校共建项目(2015-共建);北京林业大学科技创新计划项目(2017JC11);中央高校基本科研业务费专项资金资助(BLX201706) |
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| 摘 要： | 为提高装配式木结构中异形柱的力学性能,设计了一种用热压等边角钢和SPF集成材为原料,环氧树脂胶黏剂连接制作的角钢-集成材L形组合柱,作为框架结构或框架剪力墙结构的角柱。以角钢边宽度对L形柱正截面承载力的影响进行了轴压试验研究,并进行ANSYS有限元模拟,以判断模拟预测的准确性。结果表明:角钢-集成材L形组合柱相对于同截面面积的木柱而言承载能力上升37.0%~51.4%,刚度上升36.5%~72.8%,同时L形柱有良好的延性;适当增加L形柱中的角钢边宽度可以使承载能力有效提高,但是其短边处的集成材易产生破裂,增加试件的脆性破坏;集成材之间的环氧树脂胶合界面在破坏前后都性能良好,在材料弹性阶段钢材和木材有效共同受力,承载力计算时需要考虑钢材的塑形增强作用;ANSYS有限元模拟的角钢-集成材L形组合柱弹性模量结果和试验结果一致,误差在10%以内,模拟结果基本可靠。研究成果对于预测角钢-集成材L形组合柱在实际预制装配时的安全可靠性提供了理论依据。
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| 关 键 词： | 钢木组合结构 集成材 异形柱 受压性能 有限元分析 |
Study on compressive performance of angel steel-glued laminated timber L-shaped composite column |
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| Authors: | LI Wei GAO Ying MENG Xinmiao HU Qibin QIU Yaqin |
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| Institution: | (College of Material Science and Technology in Beijing Forestry University,Beijing Key Laboratory of wood Science and Engineering,MOE Key Laboratory of wooden Material Science and Application,Beijing 100083,China;Department of Civil Engineering,Beijing Forestry University,Beijing 100083,China) |
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| Abstract: | In order to improve the mechanical properties of the special-shaped columns of fabricated wooden structures,this study designed an angle-steel-glued L-shaped composite column made of hot-pressed equiangular steel and spruce,pine and fir(SPF)dimension lumber-laminated material and epoxy resin adhesive,which can be used as the corner column of frame structure or frame shear wall structure.The bearing test and analysis of the influence of the width of the angle steel on the normal section bearing capacity of the special-shaped column were carried out,and the finite element simulation was conducted using ANSYS software to verify the accuracy of the simulation prediction.The results showed that the steel-wood L-shaped composite column had a load-carrying capacity increase of 37.0%-51.4%and a stiffness increase of 36.5%-72.8%with respect to the wood column.At the same time,the L-shaped column had good ductility.The width of the edge can effectively improve the load-carrying capacity,but the laminated material at the short side was prone to cracking and increased the brittleness.The interface bonded with the epoxy resin between the laminated materials always had good performance,and the steel in the material elastic stage effectively combined with wood.The shape enhancement of the steel should be considered in the calculation of the bearing capacity.The elastic modulus of the steel-wood L-shaped composite column simulated by ANSYS software was consistent with the test results,and the error was within 10%,which proved that the simulation results were relatively reliable.The research results can provide a theoretical basis for predicting the safety and reliability of the L-shaped steel-wood composite columns in the practical industrial prefabrication. |
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| Keywords: | steel-wood composite structure glued laminated timber special-shaped column compressive performance finite element analysis |
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