造縫能力 的英文怎麼說
中文拼音 [zàoféngnénglì]
造縫能力
英文
width generation capacity-
The paper is based on the construction of the express - highway between yiyang and changde in hunan province, aiming at enhancing the serviceability of cement concrete pavement, probing into the structural assemblage of the cement concrete pavement, the roadway drainage system, contraction joint with the dowel bar and precaution of bumping at the end of the abutment. it presents some achievements of the research, including more reasonable structural assemblage and roadway drainage system, the method of setting dowelled bar in contraction joint, putting forward the concept of stage - transition from rigid to flexile behind abutment
本文以湖南省益陽至常德高速公路項目為依託,以提高水泥混凝土路面使用性能為目標,就水泥混凝土路面結構組合、路面排水系統、縮縫設置傳力桿、橋頭跳車問題的防治等方面開展研究和工程實踐,取得了豐富的研究成果,如研究採用了更合理的路面結構組合,設置了較完善的路面排水系統,在國內高速公路上率先全面採用縮縫加傳力桿技術,對所有橋涵構造物臺背全部採用剛柔過渡技術處理橋頭跳車問題等。There has not been a scientific design theory about the jointless bridge whereas it has been conducted successfully for a long time in the u. s. the actual design ways basically depend on the experience and observaration. what is more, the analytical method and the design of the crunodal details are still dealed with on the whole. in fact, it is a very important part to deal with the crunodal structure between the abutment and beam in the design and conduction of the jointless bridge. in addition, the loaded properties of the crunode are the key and difficulty in the study of the jointless bridge. therefor, there are engineering and practical significances of analyzing the crunodal structure and studying its loaded properties
盡管無伸縮縫橋梁在美國已經成功地使用了很長時間,但至今還沒有一個比較科學的設計理論。目前的設計方法基本上依賴于經驗與觀察,還沒有從根本上解決無伸縮縫橋梁有關的分析方法和設計細部構造。應該說,對于無伸縮縫橋梁而言,處理臺與主梁的結點構造是設計和施工中非常重要的部分,結點部分的受力性能是研究無伸縮縫橋梁的重點和難點。Recently, train is running faster and faster, and considering the stability and security, seamless welded rails ( swr ) are used as the train orbits gradually. the temperature of the rails will vary with weather. so that the rails may release the energy due to the metal characteristic of expanding or contracting with temperature, there is some badly distortion in the swr, worsly occurring accidents on expanding orbits. the portrait thermal stress ( pts ) of the swr should be monitored in some parts regularly, as to avoid such accident
近年來,隨著火車的提速造成的穩定和安全問題,軌道逐步轉為採用無縫焊接鋼軌,隨著鋼軌溫度的變化,無縫鋼軌可能會因為熱脹或冷縮的金屬特性並且在扣件阻力小而且路基較差的路段釋放能量,可能會發生鋼軌嚴重變形,更甚者會發生脹軌跑道等嚴重鐵道事故,為了避免發生如此事故,有必要定期對鋼軌的溫度應力進行檢測。The possible factors including the deviation of temperature in length and breadth of rod, the changes of transfiguration resisting force under the changes of temperature, the adjustment of roll gap, the variation of rolling pressure, the changes of roller speed during dynamic adjusting press, the unmatched of seconds - flux under the dimension fluctuation of the coming sample and so on. the whole system was a closed loop which factors in it interacts each other
可能的影響因素有:沿軋件縱橫向溫度變化、由溫度引起的軋件變形抗力變化、軋機輥縫值變化、負載變化、電機調節系統由不穩定向穩定過渡過程中軋輥轉速的變化(如咬鋼過程中的動態速降后的回復階段) 、來料尺寸波動造成秒流量不匹配等,整個模擬系統是各個因素相互影響關聯的一個閉環系統。Through flat experiment and circle experiment, we research the causes of cracks before hardening of concrete and after. through ingredient experiment, we research the influence of shrinkage from some ingredient ( coal ash, crushed stones and fiber ). in addition, we test some methods of construction to strengthen the anti - crack capacity of r. c. slab in building sites
通過平板試驗和圓環試驗,研究了混凝土在終凝前和終凝后裂縫的各種影響因素;通過摻合料試驗,研究混凝土的一些摻合料(粉煤灰、碎石和纖維)對其收縮變形的影響;另外,還在施工工地進行一些增強樓板抗裂能力的構造措施試驗。Different groups of fractures are vertically connected in ladder shape and form the fracture net, which improve the permeability of the formations and makes the formations good fracture - pore style reservoirs
不同組系的構造縫縱向上呈階梯連通,形成空間裂縫網路,極大地改善了侏羅系砂巖儲層的滲流能力,使其成為較好的裂縫?孔隙型儲層。Based on understanding of many practices of asphalt overlay on old cement concrete pavement in our country and rehabilitation of boai road in zhongshan city, this paper analyzes and studies the rehabilitation technology of old cement concrete pavement systematically, includes : ( 1 ) the assessment for structure characteristic of old cement concrete pavement a correct assessment for pavement distress and structure characteristic of old cement concrete pavement before overlay is the stick point of preventing reflection cracking and guarantee the success of rehabilitation, which requires understanding how the structure characteristic of old pavement effects the stress and reflection cracking of the asphalt overlay
本文在調查了解國內許多舊路改造實踐工程的前提下,基於中山市博愛一路的改造實踐,對舊水泥混凝土路面瀝青罩面改造進行了系統的分析研究。主要的研究內容包括: ( 1 )原有路面結構性能的評估在瀝青混凝土加鋪罩面之前對舊水泥混凝土路面的損壞情況和結構狀況進行正確的評價是解決反射裂縫和保證加罩成功至關重要的一環,其前提就是要了解舊水泥混凝土路面的結構特性對瀝青罩面層中的應力和反射裂縫的影響。As a steel product of higher additional value, seamless steel pipes are often impacted by raw material supply and macroeconomic environment just as other industrial products and investment projects. the constant domestic economic growth in the coming five years as well as national enlarged investment in energy projects offers pcg a very good opportunity for growth in seamless steel pipes
無縫鋼管是鋼鐵產品中一項附加值較高的產品,作為工業品和資本項目投資的原材料受宏觀經濟環境影響較大,未來五年內國內的宏觀經濟持續好轉及國家對能源項目的大力度投入給無縫鋼管這一產品的發展創造了一個良好機遇。It has been found out that using a prestressed concrete flat slab floor can decrease the thickness of the floor slab, improve forced property and service functions of the structure, and so as to save materials, reduce cost and prevent the cracks of shrinkage and temperature
採用預應力混凝土無梁樓蓋可以降低樓板厚度,改善結構的受力性能和使用功能,而且能節約材料,降低造價,防止收縮和溫度裂縫的產生。This paper, in allusion to damage of expansion joint of bridge, introduces a sort of new structure of jointless device - semi - integral abutment jointless bridge, and establishes model of general structure finite element of this bridge, and in details analyses its qualities of stress. the model considers the interaction of superstructure - substructure - soil. resistance of the soil behind abutment adopts still soil pressure and elastic resistance when the temperature rising, but active soil pressure when dropping. analysis of qualities stress of bridge includes of action of dead load, car load, temperature load of season character. taking an 100m length pc semi - integral abutment jointless bridge as instance, the paper establishes the model of plane frame by applying large common software - anasys, and analyses it by elastane and large deformation to imitate character of stress and deformation of general bridge. at the same time corresponding models of finite element of joint bridge and integral abutment bridge are established, and unique stress and performance of structure of semi - integral abutment jointless bridge are researched by comparing and analysing character of three different models under same loading, and controlling factor of design and constitution are generalized. in conclusion, for semi - integral abutment jointless bridge, on one hand shear, moment and deflection of the main beam and axis force of substructure are approximate with that of joint bridge, and integral stifmess of structure is increased and damage of expansion joint is eliminated, on the other hand there is axis force in main beam, shear and moment of substructure are bigger than that of joint bridge. in all this type of jointless bridge has rational stress and is worth of application and popularization
半整體式橋臺無縫橋梁計算模型考慮了上部結構-下部結構-土的共同作用;臺後土抗力升溫時採用靜止土壓力加彈性土抗力,降溫時採用主動土壓力;分析橋梁受力性能時考慮了結構自重、車輛荷載和季節性溫變荷載的作用。以一座橋長100mpc半整體式橋臺無縫橋梁為實例,採用大型通用軟體ansys建立平面框架模型,進行彈性、大變形分析,模擬全橋受力和變形特點;同時建立與此對應的有伸縮縫橋梁和整體式橋臺無縫橋梁有限元模型,通過三種橋型同步加載對比分析,研究半整體式橋臺無縫橋梁獨特的受力特點和結構性能,總結其設計控制因素和構造要求。通過本文研究知:半整體式橋臺無縫橋梁主梁的剪力、彎矩、撓度和下部結構的軸力與梁式橋相近,結構整體剛度增大,併除去了伸縮縫病害;但主梁增加了軸力,下部結構剪力、彎矩較梁式橋大;綜合分析是一種受力合理有實踐和推廣價值的橋型。In the process of building and using the mass concrete structures, because of the effect of out - side condition and themselves, some faults will form in the structure, these faults will effect the bearing capability and endurance using nondestructive testing method to test the concrete ' s quality and diagnose its healthy, which has the significant sense in assessing the safety stability and research of the administering diseases this dissertation mostly researched the testing methods in the mass concrete structure, discussed the principles, methods, features, sphere of application of the ultrasonic testing in the mass concrete structure with faults, used dynamic fem to simulate the testing process, discussed when the concrete structure with cracks is under the effect of the pulse, how the elastic waves propagate and what are their changing feature, researched the principles of the first - arriving waves " phase when the cracks " depths are not same, obtained the relation between the inversion point and the cracks " depth, which has the direction sense in the application of projects, the second part of this dissertation is ct, which used the ultrasonic wave running through the tested - substance to get arriving - time of the ultrasonic wave, then inverse the image this dissertation drawed one ct program which can well present the different little cells " ultrasonic wave velocity profiles of the substance, thereby to diagnose the quality of the part of the tested - substance, ct has the better using foreground.
在混凝土結構的施工及使用過程中,由於受其自身及外界各種因素的影響,常常會產生一些缺陷,對結構物的承載能力和耐久性造成嚴重影響,採用無損檢測技術進行質量檢測和健康診斷,這對混凝土結構開展安全、穩定性評估以及病害隱患治理研究具有重要意義。本論文主要針對大體積混凝土結構缺陷的檢測方法展開研究工作,重點討論了超聲波法檢測混凝土結構裂縫的基本原理和方法及其特點、適用范圍,運用動力有限元數值模擬其檢測過程,探討了有裂縫缺陷的混凝土結構在脈沖荷載作用下彈性波的傳播及其變化特徵,研究了不同裂縫深度下首波相位變化規律,得出了反轉臨界點與裂縫深度之間的關系,這對實際工程應用具有指導意義。聲波ct是一種新的無損檢測技術,它是利用聲波穿透被檢測體獲取聲波接收時間,來進行計算機反演成像的技術。With the aim of “ quality first, customer supreme ” is factory strives to provide various reliable and quality rotating hooks for sewing machine manufactures and trades such as clothing, knitting, leather and packaging both at home and abroad
努力為國內外縫紉機製造廠、服裝、針織、皮革、包裝等行業提供各類性能可靠、品質上乘的工業縫紉機旋梭。A coefficient of 0. 9 can be multiplied to ensure the safety of structures. by and large, the back covered porous brick wall with constructional column and gird beam has the same shearing strength under low circulated load as other porous brick wall, so the shear resistance and aseismatic capability can be calculated by the standard method. the experiment indicates that the back covered porous brick wall has good energy absorbing as well as deforming capability, and it can satisfy the requirement of aseismatic structures
盲孔多孔磚砌體的通縫抗剪強度略低於規范計算值,為保證結構安全,建議設計時乘以系數0 . 9 ;盲孔多孔磚墻片在低周反復荷載作用下抗剪承載力與其它多孔磚墻片基本相當,可按規范方法計算其抗震抗剪承載力;試驗證明帶構造柱及圈樑的盲孔多孔磚墻片有較好的吸能、變形能力,可以滿足抗震結構的要求。For example, the large friction loss of prestressed tendons, complex anchorage bearing joint, the problem of cracks in large area structure, axial compress of long span continuous beam under prestress. all those hinder its use in long span structure. until now days, the cognition about the behavior of such structure under loads is not enough for the realm of prestressed concrete of all the world
但是,預應力技術應用於大跨連續框架結構,在設計和施工中還存在一些缺點和不足,例如預應力筋的摩擦損失過大,節點錨固區設計和構造復雜、大面積結構的裂縫控制問題、大跨框架梁在預應力作用下的軸向縮短等,這些都是困擾大跨預應力混凝土框架結構應用的突出問題,特別是目前對于預應力混凝土超靜定結構的受力性能,國內外預應力界的認識尚不夠全面。In order to accelerate the development of preflex composite beam in railway bridges and to design and construct preflex composite beam bridges of railway in our country reasonably, this thesis is from the scientific project of railway department " experiment and application research of railway preflex composite beam " and summarizes the design information and practical projects on preflex composite beam. on the basis of above works, this thesis improves computation method in analysis of railway preflex composite beam on sectional stress, deflection of mid - span, crack width and shearing resistance and programs a software " preflex composite beam bridge structure analysis system - pfsas ", which is adapt to railway bridges in our country. moreover it makes a primary research in construction techniques and structure measures
為了迅速促進預彎組合梁在我國鐵路橋梁中的發展,合理地進行我國鐵路預彎組合梁橋的設計和施工,本文結合鐵道部科技研究開發項目「鐵路預彎組合梁的實驗與應用研究」 ,在總結以往對預彎組合梁力學性能研究成果及實際工程的基礎上,完善了鐵路預彎組合梁的截面應力、跨中撓度、裂縫寬度和抗剪分析的計算方法;編制了適用於我國鐵路橋梁的「預彎組合梁橋結構分析系統? ? pfsas 」軟體;並對預彎組合梁的施工工藝及構造措施進行了初步探索。Now, we have stablished good business relationship with a lot of european and american customers and a very strong worldwide sales network. our products are welcomed in more than 20 countries such as united states of america, united kingdom, japan, italy, singapore, etc, achieving a total annual output of usd 30million
本公司三年來的技術改造投入超過了1 . 5億元,已配置國際最先進的數碼織機近百臺平縫機和中縫機等領帶生產設備300多臺套,高檔真絲領帶的年生產能力已經超過2000萬條。But thermal stress ca n ' t be calculated without damage. and then it provided in this article the equation of the elementary damage, material intensity, elasticity modulus and temperature evolvement of rupture energy. 6
微裂縫的形成與發展仍然是由溫度應力造成的,但此溫度應力應是考慮損傷行為的應力,據此,文中導出了反映初始損傷、材料強度、彈性模量以及斷裂能的溫度損傷演變方程。The detail procedures of the loading test on the ultimate bearing capacity under different load cases and the author ' s first - hand experience during the tests are documented in the paper. based on the experimental performance, it has been verified that the superposed floor assembled by the precast - prestressed sandwich slab working under the design and the reliability of the lateral connecting character of the slab
在板側縫內施加后張法無粘結預應力,在構造上利用板側伸出的鋼筋相互搭接實現橫向傳力,變單向受力為雙向受力形成裝配整體式樓蓋結構,可明顯改善樓蓋結構的受力性能。Early age cracking of concrete has re - emerged as an important issue all over the world in recent years. the stress, due to restrained volume change related to thermal deformation and shrinkage in the early age concrete, is the main driving force for the deleterious cracking in the construction stage. during the development of the stress, creep, a very important property of concrete, is always developing. creep contributes to 40 ? - 50 ? reduction of the elastically induced stress in the restrained specimen. ring test, a qualitative test, can provide information to assess the potential for cracking of different concrete. an overview of ring test developed in recent years and mechanism of uniaxial tensile creep test is described in this paper at first. then, an innovative test equipment based on ring test is outlined
近年來混凝土早期裂縫問題再次引起全球工程界的廣泛關注.早期混凝土由於體積變形受到約束而產生的應力是導致混凝土開裂的主要因素.在混凝土應力發展的同時,混凝土徐變也在同時發生著變化.有研究表明,徐變能減少40 ? - 50 ?的早期應力.圓環試驗是用於定性評價混凝土材料抗裂性能的試驗方法之一.本文首先分析了圓環試驗和單軸拉伸徐變試驗的原理,創造性地將圓環試驗用於測量早期混凝土的干縮徐變,並設計了試驗方案The pseudo - dynamic test of 1 / 3 - scale model six - story building assembled with hollow shear wall with seams. the internal forces, the deformation and the failure mechansm of the building under earthquake are studied. the rules of frequency, damping and response spectrum are studied. the characters of earthquake response such as structure displacement, interstory drift, action of earthquake, the amplificatory coefficient of acceleration and the rule of strain are discussed. at last, this paper presented the design method of this structure based on the aseismic style and put forward the construction
進行了帶縫空心剪力墻結構六層樓房的1 3模型的擬動力試驗,研究了結構在水平地震作用下的受力特點、變形特徵、破壞形態等力學性能;得到了結構在不同受力階段的頻率、阻尼、反應譜等動力特性變化規律;討論了結構各樓層的水平位移、層間位移、地震力、加速度放大系數及構件應力分佈規律等結構地震反應特徵;指出了結構的抗震類型、薄弱層及薄弱部位;提出了多層帶縫空心剪力墻結構的第一階段設計方法和相應構造措施。分享友人