This paper focuses on the research of the stress mechanism of the ribbed shell structure in statics, dynamics and under the explosive load on the basis of the engineering practice of cave depot of single aircraft. in this paper, according to the classical shell theories, the basic differential equilibrium of the ribbed shell structure and the finite element analysis of 3d rippled plate are established, in which the function of annular ribs reinforcement bars and 3d ripped steel plates are distributed in the range of the steel, and the functions along the longitude direction of tension, bending, and torsion are neglected ; applied with dynamic analytical theory, the dynamic model of ribbed shell structure and the analytical theory model of elastic - plastic are set up ; the triangle series method is used to solve the displacement and stress under the distributed load and the concentrated load of the ribbed shell structure
本文以軍用機場地面單機掩蔽庫工程建設為工程背景,首次對內襯三維波紋鋼板混凝土拱型復合結構的受力機理進行了靜力、動力和爆炸荷載的分析研究。根據將橫
肋、鋼
筋及三維波紋鋼板的作用均勻分佈在殼體范圍內的情況,忽略橫
肋、鋼
筋及三維波紋鋼板沿殼體母線方向的抗拉、抗彎及其抗扭作用,首次推導出了內襯三維波紋鋼板混凝土殼體的微分平衡方程,建立了有限元計算模型,並採用三角函數法,求解了三維波紋鋼板混凝土拱型復合結構在分佈荷載和集中荷載作用下的位移響應和應力響應,並與普通殼體進行了比較。
Cold rolling ribbed steel wires and bars making machines
冷軋帶
肋鋼
筋成型機
Thecalculating results show that the composite action between concrete floor and steel beamsgreatly influence the bending bearing capacity and initial rotational stiffness of joints, it shouldbe considered in practical engineer. reinforcement ratio of lengthways reinforcing bar andthe stiffener of web have great influencer on the behavior of connections, while the thicknessof end - plate and degree of shear connection have a litter influence on its behavior
分析計算結果表明:樓板與鋼梁的組合作用對節點的抗彎承載力及初始轉動剛度的影響非常大,實際工程中節點設計應當考慮這種組合作用;樓板內縱向鋼
筋配
筋率與柱腹板加勁
肋對節點性能影響顯著,而連接端板厚度及剪力連接程度的影響則不是太顯著。
The application of cold squeeze faucet joint technology for ribbed reinforcement in hangzhou bay cross - sea bridge
帶
肋鋼
筋套筒冷擠壓連接技術在杭州灣跨海大橋中的應用
Abstract : experimental researches on normal section ultimate fle xural strength of prestressed reverse - rib - slab with excessive steel bar were m ade, and according to chinese norm ( gbj10 - 89 ) and american norm ( aci ) in which s train harmony analysis method was adopted, its ultimate strength was calculated, these make us further realizse the ultimate flexural strength of prestressed r everse - rib - slab with excessive steel bar
文摘:通過疊合結構中預應力超
筋倒
肋薄板正截面極限承載力的試驗研究,分別採用規范gbj10 - 89中的受彎構件、偏心受壓構件的計算公式及美國aci規范中的應變協調分析方法計算了極限承載力,從而更清楚地認識了配有高強鋼絲的超
筋倒
肋板的極限承載力計算問題。
From above analysis, it is proved that, because the internal force distribution of cast - in - situ concrete hollow floor is notably different to that of waffle slabs, designed as grillage beams and reinforced by these results, the technical advantage of this structure may not be exerted sufficiently so that leading to the increase of reinforcement
通過以上分析證實,由於現澆空心樓蓋的與
肋梁樓蓋具有顯著不同的內力分佈規律,現澆空心板按梁格進行計算並配
筋,將不能充分發揮該結構的技術優勢,導致配
筋量的增加。
Hot rolled ribbed steel bars for the reinforcement of concrete
鋼
筋混凝土用熱軋帶
肋鋼
筋
The prestressed continuous beam - arch composite bridges are a special structural system where the horizontal thrust of the arch rib is absorbed by a prestressed tie at deck level. in some cases, this type of structure is preferable because it does n ' t have the large thrust at the spring hi traditional arch bridges and the somewhat large bending moment and shear force in traditional beam bridges. as a result, the performances of the prestressing reinforcement can be efficiently utilized
它利用拱
肋承擔壓力,系梁預應力束抵抗拱端推力,吊桿及縱橫橋面系結構承受橋面荷載,既克服了傳統拱橋巨大的拱端推力,又改善了連續梁橋較大的彎矩和剪力的受力狀況,最大限度地發揮了拱梁混凝土和預應力鋼
筋各自的特點,經濟效益顯著。
The results indicate that the ratio of span to rise, the ratio of reinforcement and the stretching controlling stress are the three primary influencing factors to the failure pattern of the slab. in addition, the relationships between the ratio of deflection to span and the ratio of span to rise and the stretching controlling stress submit to linear curves, the relationship between the ratio of deflection to span and the ratio of reinforcement submits to a quadratic parabola curve
運用數值分析程序計算了175組不同跨高比、配
筋率、張拉控制應力的中強( 1270mpa )螺旋
肋鋼絲預應力空心板,結果表明跨高比、配
筋率、張拉控制應力是影響空心板破壞形態的主要因素,且構件撓跨比與跨高比和張拉控制應力呈線性關系,與配
筋率呈二次拋物線關系。
Taking an ultimate deflection more than 1 / 50 of calculating span as the determinant term, by the means of numerical analysis and regress equation respectively, this paper discusses the reasonable stretching controlling stress of usual span and reinforcement slabs for design reference
以極限撓度達到跨度的1 50作為延性破壞的判定指標,本文分別運用數值分析程序試算和回歸方程得出了常用跨度、常用配
筋的中強( 1270mpa )螺旋
肋鋼絲預應力混凝土空心板的張拉控制應力的取值,供設計參考。
If i move a finger or relax a muscle of my face, miss murdstone pokes me with her prayer book, and makes my side ache.
我動一動手指頭,或者松一松臉上的
筋肉,玫得孫小姐就用她的《公禱書》杵我,把我的
肋條杵得生疼。
The company ' s main products include : ordinary - type, forward - and - backforward - thread typeandcalibre - changed type, three series and 50 - odd varieties of steel straight thread connecting sleeve piece and steel straight thread screw rolling machine, screw rolling wheel, cutting tool, reinforced thread head special gauge, moment spanner ect., auxiliary tools which are used in construction
公司主要產品有標準型、正反絲型、變徑型三大系列五十多個品種的建築用鋼
筋直螺紋連接套筒和鋼
筋直螺紋(剝
肋)滾絲機及滾絲輪、切削刀具、鋼
筋絲頭專用量規、力矩扳手等輔具。
Thus it is necessary to study moment resistance, rotation stiffness and rotation capacity of the joints. in this paper, six specimens on end - plate composite beam - to - column joints and two specimens on end - plate composite beam - to - column joints were designed to subject to static load. the factors of m - characteristics about semi - rigid composite joints, including bolts, profiled steel sheeting, beam, column, stiffen rib and reinforcement, are studied
本文設計了6個端板型鋼-混凝土組合樑柱節點與2個端板型純鋼樑柱節點,通過對這些試件的靜力荷載試驗,重點研究了端板型鋼-混凝土組合節點的彎矩-轉角性能的影響因素,包括高強螺栓、壓型鋼板、型鋼梁、型鋼柱、加勁
肋,以及混凝土板內縱向鋼
筋配
筋率等。
The wall was equaled to an elastic composite slab with silica bricks as main body and concrete rib beams, columns and outer frame as reinforcing fiber. ( 2 ) elastic - plastic stage. the wall was equaled to a rigid frame - oblique compression bar model in which concrete frame was equivalent to a rigid frame while silica brick was equivalent to a oblique compression bar
( 1 )彈性階段? ?將墻體視為一種以輕質砌塊為基體,混凝土肋梁、肋柱、外框為增強纖維的復合材料等效彈性板; ( 2 )彈塑性階段? ?將墻體視為一個由鋼筋混凝土剛架和與之鉸接的砌塊等效斜壓桿組成的剛架斜壓桿組合模型; ( 3 )破壞階段? ?將墻體視為肋梁嚴重破損的梁鉸框架模型。