Energy dissipation of rammed earth-timber joints under cyclic loading
Energy dissipation of rammed earth-timber joints under cyclic loading
复制标题
循环荷载下夯土-木节点的能量耗散
DOI：
10.1016/j.soildyn.2021.106728
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发表时间：
2021-06
影响因子：
4
通讯作者：
Xu Yuye
中科院分区：
文献类型：
--
作者：
Luo Yi;Zhou Peisong;Ma Huihuan;Ni Pengpeng;Ding Nan;Xu Yuye
夯土建筑中使用不扩大端的夯土-木材节点已有几百年的历史。由于嵌入性，节点具有一定的灵活性，允许地面和屋面梁滑动而不破坏夯土，从而在地震时能够消散能量。夯土-木材节点的耗能机理尚未完全清楚。通过循环推拉试验，研究了8个夯土-木材节点试件的耗能特性，考察了压缩荷载、埋设长度和表面粗糙度对节点性能的影响。结果表明，在循环荷载作用下，节点刚度随拔出位移量的增大而非线性减小，直至出现滑移。上部高竖向受压、木结构的变形能力和夯土的塑性是主要的耗能形式。结合摩擦力学和土力学理论，建立了描述节理特性的线性摩擦非线性土工滞回模型。此外，还建立了简化的多线性滞回模型。预测值与实测值吻合较好，建议采用岩土工程方法对节点进行分析，并保持木框架和夯土均为线弹性的假设。
Rammed earth-timber joints without enlarged ends have been used in rammed earth buildings for several hundreds of years. Due to the embedment nature, the joint has a certain degree of flexibility, allowing the floor and roof beams to slide without damaging the rammed earth, enabling dissipating energy during earthquakes. The energy dissipation mechanism of rammed earth-timber joint has not yet been fully understood. This study studied the energy dissipation characteristic of eight rammed earth-timber joint specimens via cyclic pull-out/push-in experiments, investigating the effects of compressive loading, embedment length, and surface roughness on joint performance. Results show that the joint stiffness under cyclic loading was reduced nonlinearly with the increase of pull-out displacement until the occurrence of slippage. The high vertical compression from the upper level, the deformability of timber frames, and the plasticity of rammed earth were found to be the primary energy dissipators. A linear frictional and nonlinear geotechnical hysteretic model, combining frictional and soil mechanics theories, was established to represent the joint behavior. In addition, a simplified multi-linear hysteretic model was developed for the same purpose. The predictions and the measurements had good agreement, suggesting that geotechnical methods should be employed to analyze the joint, maintaining the assumption that both the timber frame and the rammed earth are linear-elastic.
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DOI：
10.33915/etd.2229
发表时间：
2011
期刊：
--
影响因子：
--
作者：
Daniel Sranislawski
通讯作者：
Daniel Sranislawski
DOI：
10.1116/1.568961
发表时间：
1976
期刊：
Journal of Vacuum Science and Technology
影响因子：
--
作者：
W. Jamison
通讯作者：
W. Jamison
影响因子：
4
作者：
C. Phillips;Y. Hashash
通讯作者：
C. Phillips;Y. Hashash
DOI：
10.3362/9781780444826
发表时间：
1994-12
期刊：
--
影响因子：
--
作者：
H. Houben;H. Guillard
通讯作者：
H. Houben;H. Guillard
影响因子：
1.8
作者：
W. Lu;Dong Zhao;Xiao-fei Mao;Y. Ai
通讯作者：
W. Lu;Dong Zhao;Xiao-fei Mao;Y. Ai