基于凍融損傷的重力壩抗凍耐久性分析
發(fā)布時(shí)間:2018-09-04 08:18
【摘要】:為進(jìn)一步了解混凝土的抗凍耐久性,分析了基于Loland混凝土損傷模型推導(dǎo)的混凝土凍融損傷模型,并結(jié)合試驗(yàn)數(shù)據(jù)擬合得到了混凝土彈性模量、泊松比與凍融循環(huán)次數(shù)的關(guān)系,利用ABAQUS分析混凝土重力壩滲流場(chǎng)、溫度場(chǎng),并以此確定了混凝土大壩發(fā)生凍融損傷的區(qū)域,最終采用場(chǎng)變量模擬重力壩隨凍融次數(shù)增加的穩(wěn)定性。結(jié)果表明,混凝土大壩并非所有區(qū)域均發(fā)生凍融損傷,且試驗(yàn)得到材料抗凍耐久性并不等同于混凝土重力壩抗凍耐久性。
[Abstract]:In order to further understand the frost durability of concrete, the freeze-thaw damage model of concrete based on Loland damage model is analyzed, and the relationship among the elastic modulus, Poisson's ratio and the number of freeze-thaw cycles is obtained by fitting the test data. The percolation field and temperature field of concrete gravity dam are analyzed by ABAQUS, and the region of freeze-thaw damage of concrete dam is determined. Finally, the stability of gravity dam with freezing and thawing times is simulated by field variable. The results show that not all regions of concrete dams are damaged by freezing and thawing, and the test results show that the frost durability of concrete dams is not the same as that of concrete gravity dams.
【作者單位】: 三峽大學(xué)水利與環(huán)境學(xué)院;深圳粵源建設(shè)股份有限公司;
【基金】:三峽庫(kù)區(qū)地質(zhì)災(zāi)害教育部重點(diǎn)實(shí)驗(yàn)室(三峽大學(xué))開(kāi)放基金項(xiàng)目(2015KDZ12)
【分類號(hào)】:TV642.3
本文編號(hào):2221521
[Abstract]:In order to further understand the frost durability of concrete, the freeze-thaw damage model of concrete based on Loland damage model is analyzed, and the relationship among the elastic modulus, Poisson's ratio and the number of freeze-thaw cycles is obtained by fitting the test data. The percolation field and temperature field of concrete gravity dam are analyzed by ABAQUS, and the region of freeze-thaw damage of concrete dam is determined. Finally, the stability of gravity dam with freezing and thawing times is simulated by field variable. The results show that not all regions of concrete dams are damaged by freezing and thawing, and the test results show that the frost durability of concrete dams is not the same as that of concrete gravity dams.
【作者單位】: 三峽大學(xué)水利與環(huán)境學(xué)院;深圳粵源建設(shè)股份有限公司;
【基金】:三峽庫(kù)區(qū)地質(zhì)災(zāi)害教育部重點(diǎn)實(shí)驗(yàn)室(三峽大學(xué))開(kāi)放基金項(xiàng)目(2015KDZ12)
【分類號(hào)】:TV642.3
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