flexural cracking 中文意思是什麼
flexural cracking
解釋
撓曲龜裂-
Abstract : based on the analysis of the main failures discovered in pavement on steel deck plate and the demanding service condition of the pavement on steel deck, high - temperature rutting test, low - temperature bending test and controlled stress flexural fatigue test are used to study the performance of asphalt mixtures modified by epoxy resin including high - temperature stability, low - temperature cracking - resistance, and fatigue cracking - resistance, which are served to evaluate the modification effect of epoxy resin of different contents. with the addition of epoxy resin, all the three performances are improved greatly. however, when the amount of epoxy resin added is over a certain value, the modification effect will be stable with no extra benefit detected. finally, in terms of the properties of the three respects, 20 ?, 30 ?, 30 ? are given separately as the proposal adding contents
文摘:在分析鋼橋面鋪裝層主要病害和特殊工作環境的前提下，分別採用高溫車轍試驗、低溫小梁彎曲試驗和控制應力小梁彎拉疲勞試驗，研究了不同環氧樹脂摻量下的環氧樹脂改性瀝青混合料的高溫穩定性、低溫抗裂性和抗疲勞性能.試驗結果表明:環氧樹脂對這3個方面都有很大的改進效果，但改性效果和樹脂的添加量並不是一個無限遞增的關系，當添加量超過一定數值以後，改性的效果將趨于平穩.最後就高溫、低溫、疲勞3個方面分別提出環氧樹脂添加量為20 ? ， 30 ? ， 30 ?的建議值 -
Based on the analysis of the main failures discovered in pavement on steel deck plate and the demanding service condition of the pavement on steel deck, high - temperature rutting test, low - temperature bending test and controlled stress flexural fatigue test are used to study the performance of asphalt mixtures modified by epoxy resin including high - temperature stability, low - temperature cracking - resistance, and fatigue cracking - resistance, which are served to evaluate the modification effect of epoxy resin of different contents. with the addition of epoxy resin, all the three performances are improved greatly. however, when the amount of epoxy resin added is over a certain value, the modification effect will be stable with no extra benefit detected. finally, in terms of the properties of the three respects, 20 ?, 30 ?, 30 ? are given separately as the proposal adding contents
在分析鋼橋面鋪裝層主要病害和特殊工作環境的前提下，分別採用高溫車轍試驗、低溫小梁彎曲試驗和控制應力小梁彎拉疲勞試驗，研究了不同環氧樹脂摻量下的環氧樹脂改性瀝青混合料的高溫穩定性、低溫抗裂性和抗疲勞性能.試驗結果表明:環氧樹脂對這3個方面都有很大的改進效果，但改性效果和樹脂的添加量並不是一個無限遞增的關系，當添加量超過一定數值以後，改性的效果將趨于平穩.最後就高溫、低溫、疲勞3個方面分別提出環氧樹脂添加量為20 ? ， 30 ? ， 30 ?的建議值 -
Specimens ’ cracking load under dead - load, fatigue failure characteristic, fatigue life, deflection of span - centre, fatigue flexural rigidity, maximal crack width, development of cracks and strain of concrete and steel bars have been investigated. the influence of fatigue cycle characteristic, ratio of reinforcement, kinds of aggregate and concrete compressive strength on the specimens ’ fatigue behavior has been also investigated
對試件的靜載下開裂荷載、疲勞破壞特徵、疲勞壽命、疲勞荷載作用下的跨中撓度、截面疲勞抗彎剛度、裂縫開展情況及最大裂縫寬度、鋼筋及混凝土在循環荷載作用下應變等內容進行了研究，分析了疲勞循環特徵值、縱筋配筋率、骨料種類、混凝土抗壓強度等因素對試件疲勞性能的影響。 -
The experiments showed that the cracking process of such restrained beams in this paper can be divided into three phases, that is, formation of the fanning zones, initialization and development of splitting cracks along longitudinal reinforcement, and accelerating development of the critical crack and / or cracks ( diagonal, flexural ). during the last two phases, it was observed that further opening of some cracks led to some
研究結果表明，鋼筋混凝土有腹筋約束梁的裂縫開展過程大致可分為扇形區逐步形成、劈裂裂縫出現和發展、最終臨界裂縫（斜裂縫或彎曲裂縫）加速發展至破壞等階段。在後兩個階段中存在某些裂縫發展減弱同時某些裂縫迅速開展的「此消彼漲」的現象。 -
The main achievements of this thesis are as follows : l. the effect of the frp reinforcement ratio on cracking moment is analyzed. the calculating method and corresponding calculating formulas of flexural cracking moment of frp reinforced concrete beam are put forward
分析了纖維增強塑料筋配筋率對纖維增強塑料筋混凝土梁正截面開裂彎矩的影響，提出了纖維增強塑料筋混凝土梁正截面抗裂度的計算方法和相應的計算公式。 -
It was found that the cracks can penetrate the interphase and the fiber rapidly when the interphase is thin, which causes the low flexural strength and fracture toughness, as well as the composites " brittle fracture. while the interphase is thick, multiple toughening mechanisms such as the crack deflection and matrix cracking can be activated, which cause the composites " flexural strength and fracture toughness is high and the composites " non - brittle fracture
當界面相較薄時，基體裂紋能夠迅速穿過界面相和纖維，復合材料具有較低的彎曲強度和斷裂韌性，表現為脆性斷裂模式；當界面相較厚時，復合材料能產生裂紋偏轉、基體開裂等多種增韌方式，具有較高的彎曲強度和斷裂韌性，呈韌性斷裂模式。 -
Until now, the domestic and overseas scholar has studied the factors that have effect on performance of steel fiber reinforced concrete corbel such as shear span to depth, strength of concrete, reinforcement ratio ( including longitudinal reinforcement and stirrup ) and ratio of horizontal to vertical load. for calculating the cracking load, and ultimate load domestic and foreign scholar has brought forward a series of calculative formulas and methods have been put forward that based on statistical analysis, flexural model and truss model
到目前為止，國內外學者已研究了剪跨比、混凝土強度、配筋率（包括縱向鋼筋和箍筋） 、水平荷載與垂直荷載之比等因素對鋼筋鋼纖維混凝土牛腿受力性能的影響，對牛腿的抗裂計算和承載力的計算，國內外學者曾提出了基於數理統計分析、彎壓模型和桁架模型等的一系列計算方法和計算公式。 -
The new production of pva - dfrccs is successfully made out. which have achieved excellent flexural toughness, multiple cracking and flexural load - deflection hardening
通過試驗成功研製出了具有多縫開裂和抗彎荷載-撓度硬化效應的高韌性pva - dfrcc 。 -
As soon as the normal section cracks, the crack firstly appears in the flexural region. at this moment, the load - deflection curve has a turning point. with the increase of the load, the rigidity of the beam decreases compared with that before cracking because of the development of cracks in flexural region, and the formation and development of diagonal cracks toward the loading point, the load - deflection curve is basically linear till the beam fails
正截面開裂前，荷載撓度曲線基本為線性，截面剛度較大；正截面開裂時，裂縫先在純彎段出現，荷載撓度曲線出現轉折點，隨著荷載的增加，純彎段正裂縫的發展以及剪跨段斜裂縫的產生並向梁的受壓區加荷點發展，使梁的剛度較截面開裂前減少，荷載撓度曲線也基本為線性直到梁破壞。 -
Parameter analysis, 3d nonlinear finite element program and experimental study are carried out to discuss the prestressing effects in terms of ultimate flexural strength, deflection, cracking moment, the redistribution of internal force, the stress increment of prestressed tendons, and the slip at the interface of prestressed steel - concrete composite continuous beams
本文通過參數分析、 ansys三維有限元非線性分析、模型試驗等研究方法，著重探討了抗彎承載力、撓度變形、開裂彎矩、內力重分佈、預應力筋應力增量、組合界面滑移等方面的預加力效應。 -
The results show that, for flexural - tensile fatigue test and shear fatigue test, the two kinds of structure of common asphalt concrete with strata stress absorbed layer and glass fiber grating had good ability to resist reflection cracking, while the effect of paving asphalt concrete directly on cement concrete slab was worse
結果表明，對于彎拉型疲勞試驗和剪切型疲勞試驗，普通瀝青混凝土下面鋪設strata應力吸收層、玻璃纖維格柵2種結構都具有良好的抗反射裂縫的能力，而在水泥混凝土面板上直接加鋪瀝青混凝土類結構的效果最差。 -
Some conclusions are drawn : the compressive strength and flexural strength of cubic specimens of steel fibre reinforced concrete increase with the dosage of steel fibre ; without change of dosage of steel fibre, the elastic modulus of steel fibre reinforced concrete increases with the concrete age ; steel fibre reinforced concrete is of obvious function in cracking resistance, but there is no obvious function in avoidance of cracking ; for both common concrete and steel fibre reinforced concrete, the variation of the internal temperature is different from that of the external temperature before the initial set of concrete, and the internal strain of both two kinds of concrete is great, and, in general, the variation of strain of common concrete is much greater than that of the steel fibre reinforced concrete ; after the initial set of concrete, the variation of the internal temperature of both two kinds of concrete is similar to that of the external temperature, and the variation of the internal strain is relatively small
結果表明：鋼纖維混凝土立方體的杭壓強度、抗彎強度隨著鋼纖維摻量的增加而增大；在鋼纖維摻量不變的情況下，鋼纖維混凝土的抗壓彈性模量會隨著齡期的增加而提高；鋼纖維對混凝土的阻裂作用很明顯，而對混凝土起裂的限製作用不明顯；在混凝土初凝之前，無論是普通混凝土還是鋼纖維混凝土，內部溫度的變化規律與外界溫度的變化規律不同，並且此階段混凝土內部應變的變幅很大，普通混凝土應變的變幅要比鋼纖維混凝土應變的變幅大得多；在混凝土初凝之後，無論是普通混凝土還是鋼纖維混凝土，內部溫度的變化規律與外界溫度的變化規律相同，並且此階段混凝土內部應變的變幅很小。 -
At the end of introduction, the paper presents the study content. nine rectangular beams were tested and the beams strengthened using prestressed carbon fiber sheet were compare with beams strengthened using non - prestressed carbon fiber sheet, in order to evaluate the effect of externally bonded prestressed carbon fiber reinforced plastic reinforcement on the cracking load, ultimate load and flexural stiffness of reinforced concrete beams
本文進行了9根受彎試件的試驗研究，對比了預應力碳纖維布加固的受彎構件與非預應力碳纖維布加固的受彎構件的開裂荷載、極限荷載、抗彎剛度等工作性能，分析了預應力對這些性能的影響。 -
With material test system ( mts ), the paper carried out fatigue test of flexural - tensile and shear reflection cracking of asphalt overlay on cement concrete pavement, evaluated the anti - cracking ability of five kinds of asphalt overlay structures
摘要利用mts材料試驗系統，進行舊水泥混凝土路面瀝青加鋪層彎拉型和剪切型反射裂縫的疲勞試驗，評價了5種瀝青加鋪層結構抵抗反射裂縫的能力。 -
This paper investigates 15 r. c. beams under different conditions of cfrp amount, anchor condition and load history. the experiment results show that the flexural strength, stiffness and cracking behavior of rc beams can be improved. a failure mode caused by epoxy - concrete interface bond abating is observed and analyzed in this paper
本文進行了15根鋼筋混凝土適筋梁在不同碳纖維粘貼量、錨固方式和加載歷史條件下的試驗，試驗結果表明，粘貼碳纖維加固後梁的正截面承載力提高，裂縫寬度減小，抗彎剛度有所增強；在試驗中觀察到了膠層?混凝土界面粘結失效導致的試件破壞形式。 -
The experiment test results of mechanical properties and durability of hprrc show : no matter at early age or later age, the ration of flexural strength to the cubic compression strength of hprrc is higher than ordinary concrete, and the brittleness of hprrc is reduced ; the bond performance of new - old concrete interface and chloride permeability are good ; its resistance to freeze and thaw, permeability are all excellent ; its volume stability is improved, and its cracking resistance is good
配製出和易性優良（坍落度30mm ） 12 48h能滿足開放交通的hprrc 。 5 、 hprrc力學性能、耐久性能試驗結果表明：無論早期還是後期，其折壓比均比普通砼的有所提高，脆性有所降低；新老砼粘結性能優良；並具有優異的抗凍性、抗滲性、耐磨性，抗氯離子滲透能力強；體積穩定性大為提高，抗裂性好。 -
The experiment results show that the flexural strength, ductility, stiffness and cracking behavior of rc beams can be improved. in a word, the reinforced concrete beams and outside bonding steel mash and spraying high - strength mortar can be guaranteed to work in harmony
試驗結果表明，鋼絲網外噴高強砂漿加固後梁的正截面承載能力提高，延性得以提高，裂縫發展明顯得到抑制，抗彎剛度有所增強。
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