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不同松动程度下古建筑燕尾榫节点残损评估方法研究
Study on the damage assessment methods of dovetailmortise-tenon joints under different loose degrees in ancient buildings
投稿时间: 2017-08-17  最后修改时间: 2017-10-30
DOI:
中文关键词:  古建筑  松动  燕尾榫节点  残损评估  强度储备
英文关键词:ancient building  looseness  dovetail joint  damage assessment  strength reservation
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
薛建阳 西安建筑科技大学 jianyang_xue@163.com 
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中文摘要:
      参照清工部《工程做法则例》,制作了5个缩尺比为1:3.2的燕尾榫节点,并进行了低周反复荷载试验;基于试验结果,提出了基于抵抗破坏潜能、松动程度和抵抗破坏潜能的双参数及强度储备3种残损评估方法。研究结果表明:试件的破坏形态主要表现为榫头的拔出,卯口木材纤维的翘起,随着节点松动程度的增加,滞回环捏拢效应越来越明显;基于抵抗破坏潜能和强度储备的残损评估仅考虑了单因素对残损的影响,其结果离散性较大,且未考虑节点本身松动程度的影响,对构件残损评估不够全面;而基于松动程度和抵抗破坏潜能的双参数残损评估,从节点本身的松动程度和抵抗破坏潜能两个方面考虑了其对残损的影响,较为全面和合理。
英文摘要:
      Five dovetail joints with a 1:3.2 scale made following requirements of the Engineering Fabrication Method of Qing Dynasty were tested by low-cycle reversed loading. Based on the test results, three kind of damage assessment methods including destruction-resistance-potential-based, double parameters of loose degree and destruction-resistance-potential-based and strength reservation-based were put forward. The results indicate that the tenons are partially pulled up, the fiber of wood is cocked and the gathering effect of hysteretic loops gets more obvious with the increase of loose degree. The single influence factor is considered in destruction-resistance-potential-based and strength reservation-based damage assessment method respectively to evaluate the damage of the joints. The result is largely discrete, and the method is not considering the influence of loose degree of joints. Therefore, the damage assessment is not comprehensive. While both loose degree and destruction-resistance-potential can be considered in loose degree and destruction-resistance-potential-based double parameters damage assessment method to evaluate the damage of the joints, and the method are comprehensive and reasonable.
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