木框架土坯组合墙体抗震性能试验研究与分析

Experimental Studyand Analysison Seismic Behavior of Composite Wall with Wood Frame

通过对素土坯以及木框架土坯组合墙体进行拟静力试验,归纳出组合墙体4个破坏阶段,并对两种墙体的抗震性能研究分析。利用有限元软件Abaqus建立不同高宽比、不同框架截面尺寸的组合墙体模型,分析其对构件抗侧能力的影响。结果表明:组合墙体的抗震性能提升,但对于墙体的初始刚度提升不明显。墙片高宽比与木框架截面尺寸都是影响其抗侧能力的重要因素。提出木框架土坯组合墙体初始刚度与抗侧承载力简化计算公式,计算结果与有限元模拟结果接近。

Through the pseudo static test of the unfxed adobe wall and the composite adobe wall with wood frame, this paper eoncludes the four failure stages of the composite wall, and analyzes the seismic performance of the two kinds of walls. An FE software Abaqus is used to establish a composite wall model with different H/B ratios and different frame cross sections, and the model is used to analyze its influence on the shear capacity. The results show that the seismic performance of the composite wall is improved, but the initial stiffness of the wall is not obvious. The H/B ratio and the cross section of the wood frame are all important factors that affect the shear capacity of the eomposite wall. A simplified calculation formula of the initial stiffness and shear capacity of the composite adobe wall with wood frame is proposed, and the calculated results are close to the FE simulation results.