- 摘 要
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(1 機械工業(yè)勘察設(shè)計研究院有限公司, 西安 710043; 2 西安建筑科技大學土木工程學院,西安 710055)
摘要: 木柱直接立于柱礎(chǔ)石上是傳統(tǒng)木結(jié)構(gòu)中柱腳節(jié)點最常見的連接樣式. 在水平反復荷載作用下,由于木柱與礎(chǔ)石之間一般不存在任何的連接,木柱會以柱腳與柱礎(chǔ)石相接觸的邊緣點為轉(zhuǎn)動支點發(fā)生轉(zhuǎn)動,進而產(chǎn)生搖擺,其在搖擺狀態(tài)下的受力性能對整個結(jié)構(gòu)的穩(wěn)定發(fā)揮了積極的作用. 為研究傳統(tǒng)木結(jié)構(gòu)柱腳節(jié)點在地震作用下的轉(zhuǎn)動性能,以浮擱柱礎(chǔ)連接為研究對象,首先分析了木柱在水平反復荷載作用下的受力機理,建立了柱腳節(jié)點理論計算公式;隨后依據(jù)柱腳滯回曲線的特點,提出了含有柱腳彈簧單元的木柱桿系有限元分析模型. 結(jié)果表明:柱腳節(jié)點力學模型的計算結(jié)果與試驗曲線吻合良好;木柱桿系有限元分析模型有效地反映了木柱在搖擺狀態(tài)下的滯回特點.
關(guān)鍵詞: 傳統(tǒng)木結(jié)構(gòu); 柱腳節(jié)點; 力學模型; 轉(zhuǎn)動性能; 試驗驗證
中圖分類號:TU366. 2 文獻標志碼:A 文章編號:1002-848X(2023)08-0132-05
DOI:10. 19701 / j. jzjg. 20210386
Study on mechanical model and finite element model of column base joint in traditional timber structure
WANG Long1,2, QIAN Chunyu1, LI Junlian1, ZHANG Kai1, XIE Qifang2
(1 China Jikan Research Institute of Engineering Investigation and Design Co. , Ltd. , Xi’ an 710043, China;2 School of Civil Engineering, Xi’ an University of Architecture and Technology, Xi’ an 710055, China)
Abstract: Timber column is directly placed on the stone base in traditional timber structure, which is the most commonform of column base joints. Timber column can rotate around the edge of column foot in contact with stone base underhorizontal cyclic loads due to no connections between the timber column and the stone base, which produce the swing. Themechanical behavior of the timber column in the rocking state plays an active role in the stability of the whole structure. Thefoundation column directly above was selected to study the rotation performance of column base joint in traditional timberstructure under earthquakes. Firstly, based on the analysis of the force mechanism of the timber column under horizontalcyclic loads, the theoretical calculation formula of column foot joint was established. Subsequently, according to thecharacteristics of its hysteretic curve of column foot, beam-spring finite element model, including spring element on columnbase joint, was established. The results show that the calculated results from the proposed model of column base joint werein good agreement with experimental results. The beam-spring finite element model effectively reflects the hystereticcharacteristics of the timber column in the swaying state.
Keywords:traditional timber structure; column base joint; mechanical model; rotational performance; test verification
∗國家自然科學基金項目(51878550),西部綠色建筑國家重點實驗室自主研究課題(LSZZ202116),機勘院科技研發(fā)基金項目(11740901120200048).
第一作者:王龍,博士,工程師,主要從事古建筑抗震與結(jié)構(gòu)振動控制研究,Email:wangyglg@ 163. com.
[引用本文] 王龍,錢春宇,李俊連,等. 傳統(tǒng)木結(jié)構(gòu)柱腳節(jié)點力學模型及有限元模型研究[J]. 建筑結(jié)構(gòu),2023,53(8):132-136. WANG Long,QIAN Chunyu,LI Junlian,et al. Study on mechanical model and finite element model ofcolumn base joint in traditional timber structure[J]. Building Structure,2023,53(8):132-136.
