裂縫荷載 的英文怎麼說
中文拼音 [lièfénghézǎi]
裂縫荷載
英文
cracking load under tbree-edge bearing test-
During the previous analysis of asphalt pavement structure with cracks, the stress intensity factors were usually calculated approximatively using plane strain model for some limitation. however, the assumptive load of this model is not coincident to the practical load
在以往分析含裂縫的瀝青路面結構時,由於條件的限制,通常是假設瀝青路面結構近似為一平面應變模型,但是這種模型所假設的荷載與實際作用的荷載有較大的區別。5. specimens have normal section crack and truncated section crack
5 、循環荷載作用下,試件出現了正截面裂縫和斜截面裂縫。Traffic load and temperature load are two main factors accounting for its formation and propagation
交通荷載和溫度荷載是導致反射裂縫形成和擴展的主要因素。This thesis investigated and researched on non - loaded crack, especially those caused by thermal - shrink, and analyzed the thermal - shrink stress of beam, slab and continuous - wall, found that according data of civil and overseas offered thermal - shrink calculating formula without considering effect of factors, such as the cement quantity, using of aruhuesiru, aggregate size and quantity of sand, which made the result data smaller. in addition, there are not enough construct measure in code
本文對非荷載裂縫,特別是溫度?收縮裂縫進行了調查研究,並對兩端或四周約束的梁、板和底部約束的地下連續墻進行了收縮應力分析,發現國內外有關文獻給出的收縮計算公式沒有考慮泵送商品混凝土的水泥用量、外加劑使用、骨料粒徑和砂用量等因素的影響,計算出的混凝土收縮量往往偏小;另外, 《規范》中針對溫度?收縮裂縫的構造措施不足。First, using strip - partitoning method and programming in matlab language, the numerical caculations of the relation curve between moment and curvature are done for the beams strengthened with non - prestressed and pretressed cfrp sheets, base on the assumption of plane section, non - bonding slip and non - peeled destroy. secondly, nolinear finite elemeant analysis by ansys are done for the beams strengthened with prestressed cfrp sheets base on the three assumptions before mentioned, the analysis are all done for the relation curve between load and displacement, the distribution of material stress, the distribution of cracks. lastly, calculation formula of flexural capacity and deflection are proposed
)的全過程關系曲線。其次基於上面的三個假定,選擇合理的本構關系,利用ansys通用有限元分析程序對預應力碳纖維布加固梁進行非線性有限元分析,分析了加固梁的荷載-撓度關系、材料的應力情況、裂縫的分佈情況等。最後提出了承載力計算公式和正常使用狀態下撓度計算公式。According to the recorded full process fracture curve, the paper calculated and compared the fracture toughness ( kic ), the fracture energy ( gf ) and crack tip opening displacement ( ctod ) of the different strength grade boulder concrete and crushed stone concrete, it is found that the maximal load ( fmax ) and the fracture toughness ( kic ) of boulder concrete and crushed stone concrete increase when the strength of them increases, so does the fracture energy of boulder concrete, but the fracture energy of crushed stone concrete does n ' t obviously increase when it ' s strength increases. the crack tip opening displacement ( ctod ) of all specimens chang less when the strength of concrete increases, so it is concluded that the location of the axle in the ligament of the specimens is relatively stable
根據記錄的全曲線,計算了不同強度等級的卵石混凝土、碎石混凝土的斷裂韌度k _ ( ic ) 、斷裂能g _ f以及裂縫的尖端開口位移ctod ,比較了不同強度等級卵石混凝土及碎石混凝土的斷裂韌度k _ ( ic ) 、斷裂能g _ f以及裂縫的尖端開口位移ctod的關系,發現卵石混凝土、碎石混凝土的荷載峰值fmax 、斷裂韌度k _ ( ic )隨強度增加而增加,卵石混凝土的斷裂能g _ f隨強度增加而呈增加趨勢,碎石混凝土的斷裂能g _ f隨強度增加變化趨勢平直,增勢不明顯。Based on the fem program on fracture of plane structure developed by professor fu xiaoling of ho hai university, a two demension damage and fracture finite program package which is programed in fortran 90 language is developed. the paper adopts the plane - eight - nodes isoparameters element and compute the developing law of the damage and macro - damage of plane structure under load. considering the original damage and tension and compression damage at the same time, the paper adopts the more reasonable concrete constitute relation of two demension and exponent function model
在河海大學符曉陵副教授所編制的平面結構斷裂有限元程序( dl08p4 )基礎之上,本文用fortran90語言編制的二維損傷-斷裂有限元程序包,程序採用平面八結點等參數單元分析計算平面結構在外荷載作用下損傷及宏觀裂縫的發展規律,考慮了混凝土結構體內存在著初始損傷和同時存在的拉、壓損傷,並且採用更為合理的具有損傷含義的混凝土二維本構關系(即正交異性損傷模型中的本構方程)和指數函數模型建立的並可進行拉、壓損傷可比性換算的損傷演變方程,較為真實地反映了實際情況。Its hysteretic curve is plumper, its ductility coefficient and energy dissipation capacity have been improved remarkably. the inclined staff of the steel bar truss has a restraining faction to the development of the crack, and the phenomena is that there has more crak and larger distributing area on the shear wall, which is an important token of the improved seismic capacity. concealed steel bar truss has the faction of increasing the height of plastic hinge area, which is another important token of
研究結果表明:內藏鋼桁架高剪力墻與普通高剪力墻相比:屈服荷載和極限荷載均比顯著提高;屈服剛度明顯提高;其滯回環相對飽滿,延性系數及耗能能力顯著提高;內藏鋼桁架高剪力墻,其鋼桁架斜桿對裂縫發展有控製作用,現象是墻體上的裂縫較多、分佈域較廣,這是抗震耗能能力增強的重要表徵;內藏鋼桁架高剪力墻有增大底部塑性耗能區域的作用,這是抗震耗能能力增強的另一重要表徵;內藏鋼桁架還有顯著提高抵抗剪力墻基地剪切滑移能力的作用。Products function : put our “ sun shine ” brand carbon steel fiber evenly seep into concrete to form steel fiber reinforced concrete and it can decrease the thickness of reinforced concrete by half, it not only shorten the project time, save the material and manpower expense, bring distinct economic benefit, but also increase the performance of crack resistance, percussion resistance, tensile strength, bend resistance. scosspr resostamce amd wear resistance of the reinforced base materials. if the weight ratio of 2 % steel fiber seep into the concrete, it can solve the brittleness problem of the concrete, in the condition of 60 % ralative air humidity, after 21days air - dry, even 520 days air - dry, it ' s difficult to find any crack by eyesight, the bend resistance for the steel fiber concrete is 140 times stronger than the concrete without steel fiber, the capability of impact resistance increase 10 times
產品功能:將本公司「雙興」牌碳鋼纖維系列產品均勻地摻入混凝土中,形成鋼纖維增強混凝土,可使工程中鋼筋混凝土的施工厚度降低一半,不僅縮短了施工工期,節省了材料和人工費用,帶來顯著的經濟效益,且增強了基體的抗裂、抗沖擊、抗彎、抗剪、耐磨擦等性能,如摻入本公司2 %鋼纖維的混凝土,不僅解決了混凝土的脆性問題,在空氣相對濕度60 %的條件下風干21天後,甚至在風干520天,肉眼很難發現裂縫,摻入鋼纖維后的增強混凝土比不摻鋼纖維的混凝土抗彎強度提高140倍,耐沖擊荷載提高10倍。Cracks may initiate in compression, and certainly in tension.
裂縫可能在壓縮載荷下形成,當然也可能在拉伸載荷下形成。The prime works are as follows : strain and stress distribution of section was analyzed. the effect of prestress degree. on cracking moment was explored. the relation of the unbonded prestress increment to effective reinforcement index and corresponding bonded prestress increment were studied. the formulae had been established
其次,設計了三根活性粉末混凝土無粘結預應力疊合梁,兩點對稱集中加載、一次受力,得到了它們的截面應變分佈、撓度與變形、無粘結預應力鋼絞線的預應力增量、裂縫的發展與分佈以及極限荷載。The pavement panel, under load and with already existing initial cracking & inherent damaged conditions as well as its cracks & damage, further accumulates and expanses, which lays a foundation for the fissures & breakage ; the surface layer - as the uneven pavement brings about interaction between spring plates which results in impact on the vehicle load, is the main reason speeding up the fissures in the pavement panel
在荷載作用下,使得已經存在初始裂紋和固有損傷條件的路面板,其裂縫和損傷進一步累積和拓展,為路面的斷裂破壞奠定了基礎;表面層? ?由於路面表面的不平整而引起的車板相互作用帶來車輛運動荷載的沖擊,是加速路面板斷裂的主要原因。Through the research and analysis on the three aspects concerning the base interface of the pavement panel, crack accumulation, expansion in the pavement panel and interaction between spring plates on the road surface as well as its damage on the road fatigue, it is first brought forth that the process of fissures and breakage in the cement concrete pavement can be divided into three stages, i. e. stage of initial crack formation and damage in the bottom of the pavement slab, stage of accumulation, intensifying & expansion in ruptures from load during the time of use and stage of fissures & breakage in the pavement
通過對路面板底界面開裂、路面板中裂縫積聚、擴展和路面表面車板相互作用及其對路面疲勞破壞的影響等三個層面的研究和分析,首次提出水泥混凝土路面的開裂和破壞過程可以分為三個階段,即路面板底初始損傷西南交通大學博士研究生學位論文第11頁和早期裂縫的形成階段、使用期間荷載作用對路面造成的開裂損傷累計、加劇和裂縫擴展階段以及路面斷裂破壞階段。Virtually, it is a process that the ac material gradually deteriorates and forms cracks under the traffic loads
其實質是瀝青結構層在交通荷載循環作用下內部逐漸出現損傷劣化形成宏觀裂縫的過程。The main contents are as follows. by the experiments of two joints under low - reversed cyclic loading, the paper analyzes the failure pattern, energy dissipation, ductility and cracking in the joint cores, evaluates the seismic performances and anti - crack behaviors of the joints, and deduces the anti - crack formula of the subassemblage and prestressed frame joint. through the fini te element analysis software ansys, the paper analyzes the specimens nonlinearly, and the theoretical analysis results are well consistent with those of the experiment
主要內容包括:通過兩榀節點在低周反復荷載作用下的試驗,分析其破壞形態、耗能能力、延性性能和節點核芯區裂縫開展情況,評估節點的抗震性能和抗裂能力,推導出預壓裝配式框架節點的抗裂驗算公式;並運用ansys對試驗中的節點進行了非線性分析,計算結果與試驗結果基本吻合。3. the mid - span deflection of slight corrosion specimens is smaller than that of non - corrosion specimens on the static loads and the fatigue loads ; the maximum crack width of slight corrosion specimens is larger than that of non - corrosion specimens ; fatigue life of slight corrosion specimens is shorter than that of non - corrosion specimens ; the corrosion of re - bars is a sensitive factor to fatigue life
( 3 )輕微銹蝕試件梁的跨中撓度在靜載和循環荷載下比未銹蝕梁小;輕微銹蝕試件梁的最大裂縫寬度比未銹蝕試件梁的最大裂縫寬度大;輕微銹蝕試件梁的疲勞壽命比未銹蝕試件梁的疲勞壽命降低,鋼筋銹蝕是疲勞壽命的敏感因素。This thesis set forth its position on cast - in - place r. c. slab ' s cracks while pointing out the important meaning on research slab ' s non - loaded cracks
本文對現澆混凝土樓板裂縫進行一些闡述,指出了樓板非荷載裂縫研究的重要意義。At the same time in this paper we analyze nonlinear behavior of masonry through finite element method program and obtain its load when the wall start to crack and when it destroy, the p - u curve and so on. a comparison has been made between the data obtained from the experiment and the calculated through finite element method program so that we can study the cause of crack. in this paper we use finite element method to study concrete ' s character to analyze masonry, satisfactory results have been attained
因此本文在對灰砂磚砌體進行力學性能試驗的基礎上,分析其裂縫產生的破壞模式與開裂機理,並論述了將斷裂力學知識運用於研究砌體裂縫問題的可行性;同時,本文運用有限元方法對結構低周反復加載靜力試驗所做的灰砂磚墻片進行非線性分析計算,得出墻片的開裂荷載、極限荷載、 p ? u曲線,裂縫在墻體上的分佈等,與試驗所得數據對比,以便於研究裂縫的開裂機理,並將研究混凝土的有限元方法運用到對砌體的研究中,取得了較滿意的結果,為類似的試驗分析提供了一條新的思路。On the basic of former research men ' s experience, 18 experimental members ( including 9 simple beams and 9 restrained beams ) are designed and tested. in the experiment, phenomena are observed and record by taking photos in the whole process from the first crack appears to test members crash completely, experimental data is attained including load values of crack - appear load, critical load and terminal load, stress values of reinforcing steel bar stress, compressed concrete stress and beam flank stress and values of deflection etc. by analyzing the crack ' s appearing and developing form and stress values of concrete and steel bars, the crash modes of test beams are defined ; shearing force - deflection curves are contrasted and analyzed ; the effects on shear strength of the three factors as shear span ratio, concrete strength and restraining moment are also analyzed
借鑒已有試驗的經驗,本文設計和完成了對18根超高強混凝土無腹筋梁(包括9根簡支梁和9根約束梁)在集中荷載下抗剪強度的試驗,觀察了試件從裂縫出現到完全破壞失去承載能力全過程的試驗現象並通過拍照進行記錄,獲得了試件的斜裂縫出現荷載、臨界斜裂縫荷載和極限荷載等荷載值和縱筋應變、混凝土受壓應變和梁側混凝土應變等應變值以及撓度值等。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。分享友人