The instructive conclusion was: 1 under the vertical loading, the shear-lag effect was produced badly, more severer under concentrated loading than under uniform loading .2 the longitudinal bending deformation of the beam flange was true of the imitating plane assumption of deformation . 3 the width length ratio was confirmed as the first factor working on the shear-lag effect among all the geometric parameters;4 the shear-lag coefficient of simple-supported box-girder was severer than the continuous box-girder, the shear-lag effect in the inner supported section of continuous beam was much more severer, we need paying more attention for it in designing. 5 the non-liner characteristics of material deformation have littlie influence on shear-lag effect in BGCW. 6 the experiential calculating formulation and calculating diagram for the effective flange width was raised with the only factor of the width-span ratio., but the primary location of axis of bending moments should not be changed while calculating the inertial moment .

研究認(rèn)為：1室內(nèi)模型試驗(yàn)和空間有限元分析結(jié)果均表明波形鋼腹板組合箱梁在豎向荷載作用下91亚洲国产在人线播放午夜，翼板出現(xiàn)了典型的縱向應(yīng)力剪滯效應(yīng)。2在豎向荷載作用下，截面高度上各點(diǎn)縱向正應(yīng)變分布認(rèn)為可符合"擬平截面假定"，以此作為波形鋼腹板組合箱梁抗彎計(jì)算的基本假定。3箱梁寬跨比是影響波形鋼腹板組合箱梁翼板剪滯效應(yīng)的主要因素欧美性爱爆操。4連續(xù)波形鋼腹板組合箱梁的翼板剪滯系數(shù)大于簡(jiǎn)支梁老熟妇嗷嗷叫91九色，且連續(xù)箱梁內(nèi)支點(diǎn)截面翼板剪滯效應(yīng)相當(dāng)嚴(yán)重，對(duì)此需十分重視欧美毛多,另类在线。5當(dāng)混凝土翼板受力由彈性階段進(jìn)入彈塑性階段時(shí)A片性爱网，材料的非線性特性對(duì)翼板的剪滯效應(yīng)影響甚微。6提出了根據(jù)組合箱梁的寬跨比參數(shù)來(lái)計(jì)算翼板有效寬度比的經(jīng)驗(yàn)公式和計(jì)算圖表一级黄色,平台，但箱梁截面抗彎慣性矩的計(jì)算不應(yīng)改變?cè)鹊慕孛嬷泻洼S位置一级A片黑丝。

The plastic deformation induced due to cyclic rotation of principal stress axes alone can be in the same magnitude as that due to shear with fixed principal stress axes. 2 The volumetric strain due to shearing of cyclic rotation of principal stress axes is found to be composed of a reversible dilatancy component and an irreversible dilatancy component. The former is characterized by its reversibility and is independent of past shear history, the latter by its irreversibility increases with the increase of cycle number yet its increase rate decreases with its accumulation. 3 The obvious non-coaxiality between directions of the principal stresses and principal strain increments is found and its degree depends largely on the change of shear stress component. 4 The intermediate principal stress has considerable effects on the deformation behavior of sands in the condition of cyclic rotation of principal stress axes. The accumulation rate of the irreversible dilatancy component increases with the increase of the intermediate principal stress parameter.

具有初始各向異性的砂土在純應(yīng)力主軸循環(huán)旋轉(zhuǎn)排水條件下的主要變形規(guī)律為：①純應(yīng)力主軸循環(huán)旋轉(zhuǎn)可產(chǎn)生與應(yīng)力主軸固定單調(diào)剪切處于同一數(shù)量級(jí)的塑性變形；②純應(yīng)力主軸循環(huán)旋轉(zhuǎn)引起的剪切體變包含可逆性剪切體變分量和不可逆性剪切體變分量?jī)刹糠中耘访览细?0欧美中老年人性，其中可逆性剪切體變分量在一周內(nèi)可完全恢復(fù)www.日本黄色网站在线看，基本與應(yīng)力歷史無(wú)關(guān)；不可逆性剪切體變分量隨循環(huán)周數(shù)的增加呈單調(diào)增加亚洲综合网友自拍14p，且增加速率隨其自身累積值的增大呈減小趨勢(shì)欧美囗交口爆吞精在线视频；③應(yīng)變?cè)隽恐鬏S與應(yīng)力主軸之間的非共軸現(xiàn)象顯著，且在一周內(nèi)具有分段性国产精品精品三级；④中主應(yīng)力對(duì)應(yīng)力主軸循環(huán)旋轉(zhuǎn)條件下砂土的變形特性有重要影響欧美黄色网站免费在线观看，不可逆性剪切體變分量的累積速率隨中主應(yīng)力系數(shù)的增加而增加。

Based on the first-order shear deformation theories of composite laminated plate and beam, a free vibration FEA model and method of the laminates with multiple through-width delaminations and that of the composite stiffened composite plates with multiple circle-embedded delaminations have been developed in this thesis and a linearity contact model to simulate the interacting of delaminate area was established during vibration analysis process.

目前對(duì)于含分層損傷結(jié)構(gòu)的研究工作還大多停留在單分層模型上中文国产一区在线，因此建立更能反映實(shí)際損傷情況的多分層模型国产粗大猛烈进出高潮视频大全、建立具有廣泛應(yīng)用性的數(shù)值分析方法具有重要的理論意義和工程價(jià)值。

The study is based on the Reddy s high order shear deformation theory .

首先用虛位移原理推導(dǎo)出以位移形式表達(dá)的Reddy型高階剪切變形理論復(fù)合材料層板的非線性控制方程及相應(yīng)的邊界條件欧美亚洲韩国视频一区。

Appropriate model and space discretization were chosen to simulate the loading process of specimens conducted on the Split Hopkinson Pressure Bar in two-dimension,and the adiabatic shear deformation course of the hat-shaped specimen under high strain rate was obtained.

通過(guò)選擇恰當(dāng)?shù)哪Ｐ秃涂茖W(xué)的空間離散化国产激情刺激精品狼区，對(duì)SHPB加載過(guò)程進(jìn)行了2D數(shù)值模擬，數(shù)值重現(xiàn)了帽型試樣高應(yīng)變條件下的絕熱剪切變形歷程.9x9x色福利骚网。

This paper deals with and summarizes the research and importance of ductile shear zones and presents the future direction and aim for the research of the ductile shear zones around the world. Four aspects of studies of the ductile shear zones have been proposed in this paper as follows:(1) The stress environment including the mineral assemblages, deformation, stress-shearing parameters;(2) The major element sequence and activation under condition of stress;(3) The variations of trace elements and REE, their transportation distributions under strong natural deformation as well as variations of mineral crystal parameters, which can also control the element changes during the ductile deformation;(4) The relationship between element migrations, activation and stress, which will present the new evidences for the studies of dynamic diagenesis and mineralization as well as the studies of evolution of ductile shear zones developed in middle and low levels.(5) The analysis of elements and isotopes in mylonites on the micro-scale are crucial for the understanding of component migrations during the mylonization.

對(duì)韌性剪切帶及其變形巖石的研究現(xiàn)狀和研究意義進(jìn)行系統(tǒng)的綜述加日韩加勒比一本无码精品，提出了未來(lái)韌性剪切帶及其糜棱巖的研究方向和目標(biāo)：①系統(tǒng)研究糜棱巖中主要造巖礦物組合及其變形特征，計(jì)算剪切變形巖石的應(yīng)力－應(yīng)變參數(shù)操白浆视频，搞清韌性剪切帶所處的應(yīng)力應(yīng)變環(huán)境亚洲经典综合激情；②系統(tǒng)研究韌性剪切帶巖石在天然分強(qiáng)剪切應(yīng)力作用條件下常量元素遷移機(jī)制及活化轉(zhuǎn)移的應(yīng)力排序問(wèn)題；③系統(tǒng)研究剪切變形作用過(guò)程中巖石化學(xué)組成的微量和稀土元素變化好看的欧美一级A片，討論強(qiáng)變形條件下巖石中微量元素活化和遷移規(guī)律欧美真人啪啪猛烈动态图，深入探討微量元素遷移的動(dòng)力控制，包括稀土元素配分變化的應(yīng)力制約以及應(yīng)變礦物晶格化學(xué)變化行為及其對(duì)其寄主的變形巖石元素在應(yīng)變過(guò)程中遷移變化的制約和影響；④從理論上探討天然強(qiáng)剪切應(yīng)變條件下巖石中組分活化麻豆视频网址、轉(zhuǎn)移與應(yīng)力的因果聯(lián)系欧美一级片在线免费观看，為深入探討韌性剪切帶動(dòng)力成巖作用提供理論的科學(xué)依據(jù)，為探討中Carib在线观看、下地殼中韌性剪切帶的形成和演化提供科學(xué)依據(jù)在线播放黄片精品，同時(shí)為韌性剪切變形作用條件下成巖、成礦地球化學(xué)作用提供理論和實(shí)驗(yàn)依據(jù)殴美性爱网；⑤現(xiàn)代分析技術(shù)如激光同位素原位分析以及激光ICP-MASS分析技術(shù)對(duì)研究變形域內(nèi)的巖石的元素和同位素的活化遷移規(guī)律免费欧美三级片，對(duì)深刻揭示糜棱巖化過(guò)程中的元素活化遷移機(jī)制提供更高質(zhì)量的地球化學(xué)證據(jù)具有重要的作用。

In studies of interaction among pile, platform that above it and surrounding soil, this paper employ the concept of plate element to simulate the loading character of platform, and employ the concept of solid element to simulate the character of pile and soil, using the finite element method after understanding the geometry properties of pile, soil and the platform. Analyzing the loading properties of the three entities above and their deformation, this paper also employ a special element, Penalty Element. The introduction of penalty element of this kind has served to guarantee the join harmony of displacement between solid element and plate element, thereby effectively resolving the join problem between platforms, pile that support it and surrounding soil.Considering significant property difference between pile material and its surrounding soil, there may be much shear stress on their contact interface produced under vertical load, thus causing displacement or fission. Therefore it is necessary to adopt one special constitutive law of this kind of contact interface, which can reflect its feature of loading and deformation thoroughly. On the basis of the deformation feature and constitutive laws of some contact interface obtained by Zhang Dongji and people concerned through some single-shear experiments on contact interface between structure and soil, this paper employ one pile-soil three-dimensional constant thickness contact interface model to simulate the " slide" taken place on the interface between pile and its surrounding soil. With this kind model, this paper has also created one finite element model, which can be applied to perform finite element calculation and analyze the pile-loading feature, and deduced its element stiffness matrix.

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The analysis results indicate that the horizontal displacement of chevron bracing compound structure is a shear deformation.

計(jì)算結(jié)果表明久久铯综合网，人字支撐復(fù)合結(jié)構(gòu)的水平側(cè)移表現(xiàn)為剪切變形黄色视频高清免费在线观看视频。

The vibratory equation and vibratory characteristics of tie and ballast are given. The results indicate that the effects of transverse shear deformation and axial force on vib...

計(jì)算結(jié)果指出，鋼軌的橫向剪切變形及其承受的軸向力對(duì)鋼軌的振動(dòng)水平久久国产精品免费专区A片、輪軌間的動(dòng)作用力均有影響成年人啪啪视频无码，特別是在高頻域，有著不可忽略的影響色色视频黄。

The first and second natural frequencies are analyzed accounting for the rotation inertia and shear deformation of Timoshenko model.

本文還討論梁彎曲振動(dòng)前兩階固有頻率隨著梁的剛度變化的情況成年妇女观看在线视频免费播放下载，并分析梁轉(zhuǎn)動(dòng)慣量及剪切變形等參數(shù)對(duì)固有頻率的影響。