| 刘一凡,王鹏,王永慧,史世伦,李洛克,彭俊源.双排栓钉木-砼组合梁力学性能分析[J].计算力学学报,2024,41(6):1060~1065 |
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| 双排栓钉木-砼组合梁力学性能分析 |
| Mechanical performance analysis of double-row bolted wood-concrete combination beams |
| 投稿时间：2023-07-12 修订日期：2023-10-03 |
| DOI：10.7511/jslx20230712004 |
| 中文关键词: 双排栓钉胶合木-砼组合梁 界面滑移 抗弯刚度 Ansys有限元分析 |
| 英文关键词:double-Grow stud-Gglued laminated timber-Gconcrete combination beams interface slip bending stiffness ansysfinite element analysis |
| 基金项目:自然科学基金(51308269;52068068;51708486);云南省基础研究计划(202301AT070450;202201AT070110)资助项目. |
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| 中文摘要: |
| 为研究双排栓钉组合梁与单排栓钉组合梁界面滑移的关系,基于单排栓钉胶合木-混凝土理论,通过改变单排栓钉组合梁界面上栓钉滑移本构关系,建立了双排以及多排栓钉组合梁界面滑移微分方程,求解了双排栓钉组合梁在工程中常见的3种荷载作用下的解析解,并类比了三排以及多排栓钉组合梁的界面滑移微分方程,提出了双排栓钉组合梁抗弯刚度的计算方法。发现尽管木材是正交各向异性材料,但是根据组合梁界面滑移的应变关系和胡克定律可知,界面上的滑移应与受力方向一致的弹性模量有关。单排与双排栓钉微分方程的主要区别是双排特征系数是单排特征系数的2倍。即当双排栓钉刚度为K时等价于单排栓钉的2K,因此抗弯刚度可等价成单排栓钉刚度为2K时进行计算。双排栓钉组合梁的滑移理论公式和抗弯刚度计算方法分别与Ansys数值模拟的结果一致,证明了本方法分析双排栓钉组合梁界面滑移和抗弯刚度的可靠性和实用性。 |
| 英文摘要: |
| In order to study the relationship between the interfacial slip of double-row stud-combined beams and single-row stud-combined beams,based on the single-row stud-glued wood-concrete theory,the interfacial slip differential equations of double-row as well as multi-row stud-combined beams were established by changing the peg slip constitutive relationship on the interface of single-row stud-combined beams,the analytical solutions of double-row stud-combined beams under the action of the three kinds of loads commonly found in the engineering were solved,the interfacial slip differential equations of triple-row as well as multi-row stud-combined beams were analysed,and the computation method of the bending stiffness of the double-row stud-combined beams was put forward.Conclusion: Although wood is an orthotropically anisotropic material,it is known from the strain relationship and Hooke’s law for interfacial slip in combined beams that the slip at the interface should be related to the modulus of elasticity in the same direction as the force.The main difference between single-row and double-row stud differential equations is that the double-row stud characteristic coefficients are twice as large as the single-row characteristic coefficients.That is,when the double-row peg stiffness K is equivalent to a single-row peg 2K,the bending stiffness that can be equivalent to a single-row peg stiffness is calculated.The errors of the theoretical formulations of slip and flexural stiffness calculations of double-row stud-combination beams with Ansys numerical simulations,respectively,are around 5-6%,which proves the reliability and practicability of the present method for analysing the interfacial slip and flexural stiffness of double-row stud-combination beams. |
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