- 摘 要
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(1 西南科技大學土木工程與建筑學院, 綿陽 621010; 2 中國十九冶集團有限公司, 成都 610031)
摘要: 為充分了解藏式毛石砌體在豎向荷載作用下的變形形態(tài)和破壞機理,結合藏式毛石建筑的砌筑工藝和構造特征,對 2 組典型的毛石棱柱體試件進行軸心受壓試驗. 分析了試件的變形、裂縫發(fā)展及破壞特征,獲得了試件抗壓強度等基本力學參數(shù)及受壓應力?應變曲線. 結果表明,藏式毛石砌體整體受力性能較差,且變形和損傷具有階段性特征,應力?應變曲線呈現(xiàn)明顯的非線性和鋸齒形;碎石填縫砌筑工藝能提高試件承載力,減小試件的變形.最后提出了采用統(tǒng)一分式表達受壓應力?應變曲線上升段的本構關系,此式能良好地表達相似文獻中毛石砌體的應力?應變上升段曲線.
關鍵詞: 毛石砌體; 抗壓強度; 破壞機理; 本構關系
中圖分類號:TU363 文獻標志碼:A 文章編號:1002?848X(2022)08?0118?06
DOI:10. 19701 / j.jzjg.20200510
Experimental study on compression mechanical properties of traditional Tibetan rubble masonry
WANG Yuan1,2, HUANG Hui1, JIA Bin1, WANG Ruheng1
(1 College of Civil and Architectural Engineering, Southwest University of Science and Technology, Mianyang 621010,China; 2 China 19th Metallurgical Group Co., Ltd., Chengdu 610031, China)
Abstract: In order to fully understand the deformation form and failure mechanism of Tibetan rubble masonry under verticalload combined with the masonry technology and structural characteristics of Tibetan rubble building, two groups of typicalrubble prism specimens were tested under axial compression. The deformation, crack development and failure characteristicsof specimens were analyzed, and the basic mechanical parameters such as compressive strength and compressive stress?straincurves were obtained. The results show that the overall mechanical properties of Tibetan rubble masonry are poor, and thedeformation and damage have stage characteristics, and the stress?strain curves are obviously nonlinear and zigzag. Gravel jointmasonry technology can improve the bearing capacity and reduce the deformation of specimens. Finally, a unified fractionalexpression was proposed to express the constitutive relation of the ascending section of the compressive stress?strain curve, whichcan well express the ascending section of the compressive stress?strain curves of rubble masonry in similar literatures.
Keywords:rubble masonry; compressive strength; failure mechanism; constitutive relation
∗國家自然科學基金項目(51908476, 51568058).
第一作者:汪源,碩士,主要從事毛石砌體結構力學性能研究,Email:1175781973@ qq.com.
[引用本文] 汪源,黃輝,賈彬,等. 傳統(tǒng)藏式毛石砌體受壓力學性能試驗研究[ J]. 建筑結構,2022,52(8):118?123. WANG Yuan,HUANG Hui,JIA Bin, et al. Experimental study on compression mechanical properties of traditionalTibetan rubble masonry[J]. Building Structure,2022,52(8):118?123.
