本文選題：水工隧洞 + 混凝土襯砌�。� 參考：《工程科學(xué)與技術(shù)》2017年02期

【摘要】：地震作用下水工隧洞混凝土襯砌結(jié)構(gòu)的動(dòng)態(tài)響應(yīng)是工程設(shè)計(jì)和安全評(píng)估的重要內(nèi)容,建立科學(xué)合理的混凝土動(dòng)力本構(gòu)模型以及內(nèi)水與襯砌動(dòng)力耦合作用分析方法是襯砌結(jié)構(gòu)抗震研究的關(guān)鍵環(huán)節(jié)�；趹�(yīng)變空間靜力損傷本構(gòu)的基本思路,對(duì)3維應(yīng)力狀態(tài)下混凝土靜態(tài)拉、壓損傷變量進(jìn)行定義和求解;在此基礎(chǔ)上,考慮靜、動(dòng)態(tài)荷載作用下混凝土本構(gòu)關(guān)系曲線的相似性特點(diǎn),建立了適宜編程的混凝土動(dòng)態(tài)損傷本構(gòu)模型�；趩蜗喙腆w介質(zhì)和流體介質(zhì)動(dòng)力分析的顯式有限元法,結(jié)合耦合界面的邊界條件,建立了水工隧洞內(nèi)水與襯砌耦合作用的動(dòng)力顯式有限元分析模型,該方法可以直接進(jìn)行逐步積分,無(wú)需聯(lián)立方程組求解,大大簡(jiǎn)化了計(jì)算過(guò)程,可以方便地用于分析多種介質(zhì)的波動(dòng)傳播問(wèn)題。針對(duì)某水電站引水隧洞工程進(jìn)行了實(shí)例分析,計(jì)算結(jié)果表明:1)各部位混凝土襯砌處于同步震動(dòng)狀態(tài),但腰拱部位位移明顯小于頂拱和底拱部位;2)地震作用下混凝土襯砌迅速進(jìn)入損傷開裂狀態(tài),腰拱部位襯砌應(yīng)力增加明顯,損傷破壞嚴(yán)重;3)開裂破壞區(qū)由腰拱逐漸向兩端擴(kuò)展,與內(nèi)水直接作用的內(nèi)層襯砌結(jié)構(gòu)是抗震設(shè)計(jì)的薄弱環(huán)節(jié)。該模型能夠合理地反映水工隧洞混凝土襯砌的地震動(dòng)響應(yīng)特性,并為水工隧洞抗震設(shè)計(jì)提供了一種有效的分析方法。
[Abstract]:The dynamic response of concrete lining structure of hydraulic tunnel under earthquake is an important part of engineering design and safety assessment. Establishing a scientific and reasonable concrete dynamic constitutive model and the analysis method of the dynamic coupling between internal water and lining are the key links in the seismic research of lining structure. Based on the basic idea of static damage constitutive theory in strain space, the static tensile and compressive damage variables of concrete under three dimensional stress are defined and solved. Based on the similarity of constitutive curve of concrete under dynamic load, a suitable dynamic damage constitutive model of concrete is established. Based on the explicit finite element method for the dynamic analysis of single phase solid and fluid media and the boundary conditions of the coupled interface, a dynamic explicit finite element analysis model for the coupling of water and lining in a hydraulic tunnel is established. This method can be used to solve the problem of wave propagation in many kinds of media directly, without solving simultaneous equations, which greatly simplifies the calculation process. An example analysis of diversion tunnel project of a hydropower station is carried out. The calculation results show that concrete lining is in synchronous vibration state in every part of the concrete lining. However, the displacement of the waist arch is obviously smaller than that of the top arch and the bottom arch. Under the earthquake, the concrete lining rapidly enters into the state of damage and cracking, and the stress of the lining in the waist arch increases obviously, and the damage area expands gradually from the waist arch to the two ends. The inner lining structure acting directly with inner water is a weak link in seismic design. The model can reasonably reflect the ground motion response of hydraulic tunnel concrete lining and provide an effective analysis method for seismic design of hydraulic tunnel.
【作者單位】： 武漢大學(xué)水資源與水電工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;武漢大學(xué)水工巖石力學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(“973”)資助項(xiàng)目(2015CB057904) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51579191);國(guó)家自然科學(xué)基金資助項(xiàng)目(51279136)
【分類號(hào)】：TV312;TV672.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉貴書,劉詠梅;水工隧洞定向開挖點(diǎn)的測(cè)算方法[J];湖北水力發(fā)電;2004年02期

2 邱發(fā)起;;水工隧洞滲漏的綜合治理[J];鐵道建筑;2006年02期

3 吳海朋;;水工隧洞施工如何進(jìn)行索賠[J];山西建筑;2008年10期

4 李先武;;關(guān)于水工隧洞混凝土施工的探討[J];山西建筑;2008年13期

5 汪銀寶;;水工隧洞混凝土施工質(zhì)量控制措施分析[J];中國(guó)新技術(shù)新產(chǎn)品;2009年20期

6 趙亞永;安玉鎖;趙旭;;基于水工隧洞安全的若干思考[J];河南科技;2012年23期

7 阿·恩·阿達(dá)莫維奇 ,德·伏·闊勒東諾夫 ,張愛珍 ,聶振偉;水工隧洞的灌漿[J];水力發(fā)電;1954年04期

8 潘家，

本文編號(hào)：2011582