钢板-自攻螺钉加固残损古建筑木结构直榫节点抗震性能试验研究

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英文篇名：Experimental Study on Seismic Performance of Damaged Straight Mortise-tenon Joints of Ancient Timber Buildings Strengthened with Steel Plates and Self-tapping Screws 作者：孙兆洋 ; 程小武 ; 陆伟东 英文作者：SUN Zhaoyang;CHENG Xiaowu;LU Weidong;College of Civil Engineering,Nanjing Tech University; 关键词：单向直榫榫卯节点 ; 人工模拟残损 ; 内嵌钢板 ; 自攻螺钉 ; 抗震性能 英文关键词：one-way straight mortise-tenon joint;;artificial damage simulation;;steel plates;;self-tapping screws;;seismic behavior 中文刊名：JGGC 英文刊名：Structural Engineers 机构：南京工业大学土木工程学院; 出版日期：2018-10-28 出版单位：结构工程师 年：2018 期：v.34 基金：《江苏省古建筑保护修缮技术规程》编制研究(51230029) 语种：中文; 页：JGGC201805015 页数：7 CN：05 ISSN：31-1358/TU 分类号：110-116

摘要

为了研究不同残损程度的直榫节点及用钢板-自攻螺钉加固不同残损程度直榫节点的抗震性能,制作了12件缩尺比例为1∶2的单向直榫节点模型,包括完好节点模型2件,残损度为7%、15%、25%的人工模拟残损节点模型各2件,用钢板-自攻螺钉加固残损度为7%、25%的残损节点模型各2件。试验结果表明:单向直榫榫卯节点的破坏主要发生在榫卯节点处;所有节点的荷载位移滞回环形状呈反S形且残损程度越大滞回环"捏拢"效应越明显,未加固节点随着残损程度的增加,滞回环的面积减小;未加固残损节点的承载力、刚度明显低于完好节点且随着残损程度增加逐渐降低,加固后残损节点的承载力、刚度较加固前显著提高,耗能能力有所降低;钢板-自攻螺钉适合加固强度或刚度明显不足的榫卯节点。
        In order to study the seismic performance of one-way straight mortise-tenon joints with damage and which are strengthenedwithsteel plates and self-tapping screws,12 one-way straight mortise-tenon joints models with a 1 ∶ 2 scale were tested by low-cycle reversed loading,including 2 intact joints,2 artificially damaged joints each with damage degree of 7% and the same with damage degree of 15% and 25%,2 artificially damaged joints each with damage degree of 7% strengthened with steel plates and self-tapping screws and the same with damage degree of 25%. The results indicate that the destruction occurs at the mortise-tenon joints.The shape of hysteretic loops of all joints is S shaped and the gathering effect gets more obvious with the increase of damage degree. The area of hysteretic loops decrease with the increase of damage degree. The load capacity and stiffness of the damaged joints which are not strengthened are significantly below the intact one and reduce gradually as the damage increases. The load capacity and stiffness of the damaged joints strengthened with steel plates and self-tapping screws are significantly higher than those damaged joints which are not strengthened,and their energy dissipation capacities are lower than before. Steel plates and self-tapping screws are suitable for the strengthening of mortise-tenon joints,the strength or rigidity of which is obviously inadequate.

引文

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