木梁抗弯性能试验研究
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摘要
通过对四根矩形截面杨木梁的受弯静力试验,研究了杨木梁的抗弯强度与抗弯弹性模量等主要抗弯性能。测得木梁在两点集中荷载作用下的跨中应变和挠度数据,分析了荷载与挠度及应变的关系,计算了杨木的抗弯强度与抗弯弹性模量。通过进行木材基本力学性能试验,确定了杨木顺纹抗拉、压强度与弹性模量,横纹抗压强度与弹性模量。试验结果为后期的木梁与木柱、梁—土坯组合墙体有限元数值分析提供了试验依据。
The static bending tests on 4 rectangular poplar wood beams were carried out.The bending behavior,failure mode and the relationship between load and deflection as well as strain of wood beams are analyzed.At the same time,the bending strength and elastic modulus are calculated.Through the basic mechanical test,the compressive strength,tensile strength and elastic modulus parallel and perpendicular to the grain are determined,the experimental data of strain and deflection are obtained.The experimental results provide a reference for the later finite element numerical analysis on wood beams,wood column and beam-adobe composite wall.
The static bending tests on 4 rectangular poplar wood beams were carried out.The bending behavior,failure mode and the relationship between load and deflection as well as strain of wood beams are analyzed.At the same time,the bending strength and elastic modulus are calculated.Through the basic mechanical test,the compressive strength,tensile strength and elastic modulus parallel and perpendicular to the grain are determined,the experimental data of strain and deflection are obtained.The experimental results provide a reference for the later finite element numerical analysis on wood beams,wood column and beam-adobe composite wall.
引文
[1]阿肯江.托呼提,亓国庆.基于ANSYS的木梁有限元静力弹塑性分析[J].世界地震工程,2007,23(3):152～157.
[2]王全凤,李飞,陈浩军,等.GFRP加固木梁抗弯性能的试验研究与理论分析[J].建筑结构,2010,40(5):50～52.
[3]李飞.FRP加固木梁抗弯性能的试验研究[D].福建泉州:华侨大学土木工程学院,2009.
[4]刘伟庆,杨会峰.工程木梁的受弯性能试验研究[J].建筑结构学报,2008,29(1):90～95.
[5]杨会峰,刘伟庆,邵劲松,等.FRP加固木梁的受弯性能研究[J].建筑材料学报,2008,11(5):591～597.
[6]姬卓.CFRP材料加固木梁性能研究[D].上海:上海交通大学船舶海洋与建筑工程学院,2009.
[7]邹红玉,郑红平.木材弹性模量的测量与材料力学性能[J].实验室研究与探索,2009,28(7):33～35.
[8]M.Oudjene,M.Khelifa.Finite element modelling of woodenstructures at large deformations and brittle failure prediction[J].Materials and Design,2009,30:4081～4087.
[9]A.Borri,M.Corradi.Strengthening of timber beams with highstrength steel cords[J].Composites:Part B,2011,42:1480～1491.
[10]R.D.S.G.Campilho,M.FS.F.de moura.Experimental andnumerical evaluation of composite repairs on wood beamsdamaged by cross-graining[J].Construction and BuildingMaterials,2010,24:531～537.
[11]GB/T1935-2009,木材顺纹抗压强度试验方法[S].
[12]GB/T1938-2009,木材顺纹抗拉强度试验方法[S].
[13]GB/T1939-2009,木材横纹抗压试验方法[S].
[14]GB/T1936.1-2009,木材抗弯强度试验方法[S].
[15]GB/T50329-2002,木结构试验方法标准[S].
[16]GB/T1931-2009,木材含水率测定方法[S].
[2]王全凤,李飞,陈浩军,等.GFRP加固木梁抗弯性能的试验研究与理论分析[J].建筑结构,2010,40(5):50～52.
[3]李飞.FRP加固木梁抗弯性能的试验研究[D].福建泉州:华侨大学土木工程学院,2009.
[4]刘伟庆,杨会峰.工程木梁的受弯性能试验研究[J].建筑结构学报,2008,29(1):90～95.
[5]杨会峰,刘伟庆,邵劲松,等.FRP加固木梁的受弯性能研究[J].建筑材料学报,2008,11(5):591～597.
[6]姬卓.CFRP材料加固木梁性能研究[D].上海:上海交通大学船舶海洋与建筑工程学院,2009.
[7]邹红玉,郑红平.木材弹性模量的测量与材料力学性能[J].实验室研究与探索,2009,28(7):33～35.
[8]M.Oudjene,M.Khelifa.Finite element modelling of woodenstructures at large deformations and brittle failure prediction[J].Materials and Design,2009,30:4081～4087.
[9]A.Borri,M.Corradi.Strengthening of timber beams with highstrength steel cords[J].Composites:Part B,2011,42:1480～1491.
[10]R.D.S.G.Campilho,M.FS.F.de moura.Experimental andnumerical evaluation of composite repairs on wood beamsdamaged by cross-graining[J].Construction and BuildingMaterials,2010,24:531～537.
[11]GB/T1935-2009,木材顺纹抗压强度试验方法[S].
[12]GB/T1938-2009,木材顺纹抗拉强度试验方法[S].
[13]GB/T1939-2009,木材横纹抗压试验方法[S].
[14]GB/T1936.1-2009,木材抗弯强度试验方法[S].
[15]GB/T50329-2002,木结构试验方法标准[S].
[16]GB/T1931-2009,木材含水率测定方法[S].
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