發(fā)布時(shí)間：2018-03-22 08:06

  本文選題：水閘底板　切入點(diǎn)：地基接觸　出處：《山東大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：在水閘設(shè)計(jì)中,與地基基礎(chǔ)接觸的底板的受力情況是設(shè)計(jì)人員最為關(guān)心的問(wèn)題之一。尤其對(duì)于新型式的水閘結(jié)構(gòu),有些新型式的水閘的主要特點(diǎn)是：跨度大、水頭低、要求設(shè)計(jì)新穎,構(gòu)思巧妙、造型獨(dú)特。但是另一方面,此類(lèi)水閘結(jié)構(gòu)較為特殊,受力條件較為復(fù)雜,按照傳統(tǒng)的結(jié)構(gòu)力學(xué)方法很難較為合理的對(duì)結(jié)構(gòu)進(jìn)行受力分析,,可以對(duì)此類(lèi)水閘的結(jié)構(gòu)開(kāi)展三維有限元分析。 本文利用ABAQUS有限元軟件,結(jié)合具體的工程實(shí)例,進(jìn)行三維建模計(jì)算,模擬分析了某護(hù)鏡門(mén)型式水閘底板采用閘墩分縫和底板分縫時(shí),對(duì)于不同的荷載工況,其相應(yīng)的受力及變形情況。為工程實(shí)際提供設(shè)計(jì)依據(jù),并對(duì)此種類(lèi)型的水閘的設(shè)計(jì)具有重要的參考價(jià)值。本文主要的研究結(jié)果包括以下方面： 1、水閘底板在各種荷載作用下,其變形呈現(xiàn)上游上部順?biāo)飨蛭灰谱冃?上游下部逆水流向位移變形;下游上部逆水流向位移變形,而下游下部順?biāo)飨蛭灰谱冃蔚淖兓?guī)律,即水閘底板在順?biāo)飨蛏喜刻幱谝粋�(gè)“受擠壓”的狀態(tài),下部處于一個(gè)“受拉伸”的狀態(tài)。 2、水閘閘室在兩種分縫型式下,在豎直向的位移變形量及變形規(guī)律差別較大。具體來(lái)說(shuō),閘墩分縫時(shí),閘室在豎直向位移變形呈現(xiàn)左右對(duì)稱的規(guī)律,這對(duì)于閘室的穩(wěn)定是比較有利的。而底板分縫時(shí),閘室在豎直向位移變形既有左右對(duì)稱的變化規(guī)律,也有正向漸進(jìn)的變化規(guī)律,還有反向漸進(jìn)的變化規(guī)律。反向漸進(jìn)的變化,指水閘上游沉降較小,而下游沉降較大,這種沉降規(guī)律對(duì)于閘室的穩(wěn)定是較為不利的。 3、發(fā)現(xiàn)在閘門(mén)開(kāi)啟時(shí),水閘的各種內(nèi)力,均較其他情況下水閘的內(nèi)力大。所以在實(shí)際水閘運(yùn)行過(guò)程中,護(hù)鏡門(mén)型式的水閘,應(yīng)注意閘門(mén)開(kāi)啟時(shí)間的控制,不要長(zhǎng)時(shí)間開(kāi)啟閘門(mén)。
[Abstract]:In the design of sluice, the stress condition of the bottom plate in contact with the foundation is one of the most concerned problems for the designer. Especially for the new type of sluice structure, some new types of sluice are characterized by large span and low water head. New design, ingenious conception and unique shape are required. On the other hand, this kind of sluice has a special structure and complex stress conditions. According to the traditional structural mechanics method, it is very difficult to carry on the force analysis to the structure reasonably, can carry on the three-dimensional finite element analysis to the structure of this kind of sluice. In this paper, ABAQUS finite element software is used to simulate and analyze the different load conditions of the bottom slab of a mirror door type sluice when the pier joint and the floor joint are adopted. The corresponding stress and deformation provide the design basis for engineering practice, and have important reference value for the design of this type of sluice. The main results of this paper include the following aspects:. 1. Under all kinds of loads, the bottom plate of sluice sluice presents the displacement deformation of upstream flow direction, upstream bottom flow direction displacement deformation, downstream upstream reverse water flow displacement deformation, downstream upstream reverse water flow direction displacement deformation, and downstream downstream downstream water flow direction displacement deformation. That is, the bottom plate of sluice is in a "squeezed" state in the upper part and a "stretched" state in the lower part. 2. The displacement deformation and deformation law of sluice chamber in vertical direction are different from each other in two types of joint. Specifically, when piers are jointed, the displacement deformation of sluice chamber in vertical direction is symmetrical to the left and right. This is beneficial to the stability of the gate chamber. When the floor joint is divided, the vertical displacement deformation of the gate chamber has both the law of symmetrical variation of left and right, the law of positive progressive change, and the law of reverse gradual change. The upstream settlement of sluice is small, but the downstream settlement is larger, which is unfavorable to the stability of sluice chamber. 3. It is found that when the gate is opened, the internal force of the sluice is greater than that of the sluice under other conditions. Therefore, during the operation of the actual sluice, the control of the opening time of the gate should be paid attention to, and the gate should not be opened for a long time.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TV66;TV223

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本文編號(hào)：1647791