base shear 中文意思是什麼

base shear 解釋
底部剪力
  • base : n 1 基底，基，根基，底座；底層，底子；（紀念碑等的）基址；（山）麓。2 【軍事】基地，根據地。3 根...
  • shear : vt vi （sheared 〈古語〉 shore; shorn sheared）1 剪（羊毛等）；修剪（樹木）；剪（呢絨的）長毛。2 ...
  1. Many planets ( for example, ganymede, mercury, the earth, jupiter and saturn ) and stars ( for example, the sun ) possess intrinsic magnetic fields. the explanation for their existence and variation remains a great challenge to planetary scientists and astrophysicists. this article attempts to review some recent developments and difficulties in the study of magnetohydrodynamics for the electrically conducting fluid interiors of planets and stars. it is the fluid motions, usually driven by thermal convection, that generate and sustain magnetic fields through magnetohydrodynamic processes in planets and stars. in planets, the magnetohydrodynamic processes are strongly affected by the combined and inseparable effects of rotation, magnetic fields and spherical geometry. the key dynamics involves the interaction between the coriolis and lorentz forces. in the sun, it is the solar tachocline, a thin shear flow layer located at the base of the convection envelope, that plays an essential role in the solar magnetohydrodynamic processes which produce the 11 - year sunspot cycle. some results of a new nonlinear three - dimensional solar dynamo model are also presented

    許多行星（如木衛三，水星，地球，木星和土星）和恆星（如太陽）具有內部磁場.對這些磁場的存在和變化的解釋對行星科學家和天體物理學家是一個巨大的挑戰.本文試圖總結行星和恆星的導電流體內部磁流體力學研究的新近發展和困難.一般由熱對流驅動的流動通過磁流體力學過程產生並維持在行星和恆星中的磁場.在行星中磁流體力學過程強烈地受到轉動，磁場和球幾何位型的綜合影響.其動力學的關鍵方面涉及科里奧利力和洛倫茲力間的相互作用.在太陽中其流線，即處于對流層的薄的剪切流層在太陽的磁流體力學過程中扮演了一個基本的角色，並由之產生了11年的太陽黑子周期.本文也給出了一個新的非線性三維太陽發電機模型
  2. The diagnostic analysis for the sandstorm process on the base of height, temperature, pressure and wind etc output from the model shows that the upper cold trough, low - level wind shear, surface cold anticyclonic ridge, mesoscale cyclone and cold front are the main synoptic systems, surface cold anticyclonic ridge and cold front provide condition of wind force to occurrence of the sandstorm weather, the strong mesoscale cyclone before front makes pressure gradient before and after cold front obviously strengthen, moreover, and it increases obviously the temperature of the controlled area, as a result, the updraft movement caused by convergence before front strengthens

    500hpa強鋒區、 700hpa切變和鋒前中尺度系統的強弱及位置變化是沙塵暴天氣發生發展到減弱的直接原因。地面冷高壓、地面氣旋及冷鋒是造成本次沙塵暴天氣的主要地面天氣系統。地面冷高壓及冷鋒為沙塵暴天氣的發生提供了風力條件，而中尺度氣旋使冷鋒前後氣壓梯度明顯增強外，又使所控制的區域增溫明顯，使鋒前輻合上升運動加強，為沙塵暴天氣的發生提供了熱、動力條件。
  3. The number of modes should be selected according to the participant coefficient of mode when calculating the internal force by the response spectrum method ; ( 4 ) the roof plate of large base which connect the towers together should be thick enough but not exceeding the proper scope that the towers and the large base can vibrate together, ( 5 ) in structures with large base and muti - towers, with increasing of the capacity of the large base, the inter - story shear force will increase while the inter - story displacement will decrease as to fulfill the ductility request to avoid the large base becoming weak story, but meanwhile, the upper story will turn into weak story, thus the coefficient r s should be within 2. 0 ~ 3. 0

    採用振型分解反應譜法計算結構內力時應根據振型參與系數選擇振型避免漏選；大底盤多塔樓結構連接各塔樓的裙房屋面剛度應做得大些，以保證底部裙房與上部塔樓共同振動，但也不能過剛；大底盤多塔樓結構底盤承載力的加強將使底盤層剪力增大、層間變形減小，但易於滿足延性要求，在一定程度上可避免底盤成為薄弱層。但底部加強會導致薄弱層的上移，因此採取提高底盤承載力的措施的效果是有限度的，承載力系數s宜取為2 . 0 3 . 0之間。
  4. To meet the demands for large space and flexible compartmentation of buildings, laminated vierendeel trusses are adopted in high - position transfer story structures. first the bearing characteristics are analyzed, in which reasonable stiffness ratio of the upper chord, middle chord, and lower chord is derived. then combined with an actual engineering model ( 1 8 similar ratio ), the static loading and pseudo - dynamic tests of two models for laminated vierendeel truss used in transfer story structures are conducted, in which one model adopts reinforced concrete, and the other adopts prestressed concrete and shape steel concrete. seismic behaviors are analyzed, including inter - story displacement, base shear - displacement skeleton curves, and equivalent viscosity - damping curves. a program is programmed to carry out the elasto - plastic dynamic analysis, and displacement time - history curves of the two models are derived. the test and analysis results show that the laminated vierendeel truss with prestressed concrete and shape steel concrete has excellent seismic behaviors. it can solve the disadvantages of laminated vierendeel trusses used in transfer story structures. finally, some design suggestions are put forward, which can be referenced by similar engineering

    為滿足建築物大空間和靈活隔斷要求，在高位轉換層結構中採用迭層空腹桁架結構.首先分析了其受力性能，得出了空腹桁架各構件合理的截面剛度以及布局形式.然後結合一實際工程，進行了兩榀迭層空腹桁架轉換結構模型（ 1 : 8相似比）的豎向荷載下靜力試驗以及擬動力試驗.其中一榀為普通混凝土迭層空腹桁架，另一榀配置了預應力和鋼骨混凝土，對比分析了兩模型的層間位移比、骨架曲線以及等效粘質阻力系數等抗震性能的比較，並進行了彈塑性動力分析.試驗和分析結果表明，配置預應力和型鋼混凝土的迭層空腹桁架轉換結構具有良好的抗震性能，可以成功地解決迭層空腹桁架作為轉換層結構所產生的弊端問題，最後對這類轉換層結構提出了相應的設計建議
  5. The results showed that : ( 1 ) the models used by author and the analysis are useful and can be practiced. ( 2 ) after using isolation technology, the structure ' s period, earthquake response, base shear force and acceleration are all decreased markedly and the horizontal displacement focuses on isolation layer. ( 3 ) under frequent earthquake action, the shear force ratio between layers is close to 0. 35 ; in according with the provision in aseismic design code that the horizontal seismic reduction coefficient can choose 0. 53 and the upper building can be designed by decreasing one degree

    計算模型分別採用三維空間模型及規范中建議的彈簧、質量模型，隔震層採用疊層橡膠隔震支座，運用大型結構有限元計算程序sap2000以及自主開發的nba結構程序計算隔震結構在多維地震動輸入下的動力非線性時程反應，同時研究了隔震結構在溫度變化的作用下，結構各桿件的內力變化，通過對變電建築物在傳統抗震作用下及隔震作用下的分析比較，得出一些有益的結論。
  6. Based on the research of influenced parameters on constant and varying depth solid web box girder before, the shear lag aroused by the parameters including width - span ratio, outstanding flange on base slab and the position of the tendons are further studied. the investigation show that shear lag values diminish along with the decease of width - span ratio and the departure from the symmetrical axis of anchor position, but outstanding flange is contrary to the former

    在前人對等截面、變截面實腹箱梁剪力滯效應影響參數研究的基礎上，本文進一步對腹板開孔的連續箱梁的寬跨比、底板翼緣伸出以及預應力錨固位置改變等參數對箱梁剪力滯的影響進行研究。
  7. 2 ) the value of base frequency, which is the first order vertical - bending vibration, is bigger in box girder bridges than those of t - beams. it shows that the vibration performance of box girder bridge is better than t - beams. 3 ) when considering the shear deformation of beam, the vibration frequency calculated by is bigger than those not considering the shear deformation

    T型梁的基頻為橫向振動，而整體箱梁的基頻為豎向彎曲振動；整體箱梁的一階豎彎振動的頻率比t型梁得到了提高；整體箱梁的動力性能優于t型梁；考慮剪切變形后，梁的自振頻率降低，對于整體箱梁其降低值接近於5 ，在分析時不應忽略。
  8. On the base of the anti - theory, the shear property of high - strength concrete column confined with high - strength continue compound spiral hoops is analyzed taking account of the advantage and disadvantage influence by the axial load

    在前述理論的基礎之上，考慮到軸力對抗剪的各種有利和不利的影響和連續復合螺旋箍筋對高強混凝土的約束作用，具體分析了高強混凝土高強連續復合螺旋箍筋柱的抗剪性能。
  9. The deformation of the structure mainly focused on the isolated layers and the superstructure shift as a whole. the interlayer displacement of the isolation system is far low. the earthquake effect of the base - isolated structure is dicided on the horizontal stiffness and elastic and plastic capability of the isolated layer, the base shear, the interlayer shear, th ' e interlayer displacement of the isolation system is far lower than the result of the base - fixed system under the same condition of the superstructure

    橡膠墊隔震結構在水平地震作用下的反應以「整體運動」為主，結構位移主要發生在隔震層，上部結構的層間位移很小。隔震結構的地震反應主要決定於隔震層的剛度和彈塑性性能。其中，隔震結構的基底剪力，上部結構的層間剪力在多遇地震下，比不隔震時均有所降低。
  10. Based on the full - depth / part - depth shear spring model proposed by luo weide and the theoretical corealation between the pile base resistance and the pile base settlement presented by randolph, a elastic analytical approach for computing the pile compression is conducted

    本文利用羅惟德全深度? ?變深度剪切彈簧模型推導了樁身壓縮量的彈性理論解析計算方法，選用randolph的樁端沉降與樁端阻力的關系，利用荷載傳遞法推導了樁身壓縮量的數值計算方法。
  11. The shear strength was 7. 6 % higher. there was n ' t any oxidation in the joint region, and the structure was as same as the structure of base metal

    該強度在目前報導中尚不多見，且接頭區域沒有夾雜物，接頭組織幾乎不能分辨，與母材組織相似。
  12. In order to study the direct relation between oil - base drilling fluid performance and cement job quality, a new developed evaluation method ( artificial core method ) was adopted ; the effects of the oil - base drilling fluid system and its main components on the shear cementing strengths of the first and second interfaces in cementing operation were investigated ; and those of the different mix slurry ratios on the gel strength, initial set time, final set time of slurry and the compressive strength of bond cement were examined too

    摘要為了研究油基鉆井液性能和固井質量之間的直接關系，採用新建立的評價方法人工巖心法，考察了油基鉆井液體系及其主要組分對固井作業中第一、第二界面剪切膠結強度的影響規律，以及不同混漿比例下對水泥漿膠凝強度、初凝時間、終凝時間和水泥石抗壓強度的影響規律。
  13. According to the code for aseismatic design of building structure ( gbj11 - 89 ), the seismic base - shear method has always been used to calculate the seismic response of building structures. in those structures, their weights and rigidities equally distribute along their heights which do not exceed 40m, and their deformations are mostly the shearing type ( when the structures " ratio of height and width are smaller than 4 )

    我國《建築抗震設計規范》 （ gbj11 ? 89 ）中規定，對于重量和剛度沿高度分佈比較均勻、高度不超過40m ，並以剪切變形為主（房屋高寬比小於4時）的結構，可採用近似計演算法，即底部剪力法來計算其地震響應。
  14. Equivalent base shear method

    根據地震反應譜理論
  15. This method is very effective, base shear, floor deformation, acceleration of isolation structure is less than no isolation structure

    而且隔震結構的基底剪力、層間位移、各層加速度都遠遠小於不隔震結構的計算結果。
  16. Because the tissue is defers to conventional the method in the base shear, therefore must patch and the redesign is a very big challenge

    因為薄紗是按照常規的方法在底部剪斷的，所以要修補和重新設計是個很大的挑戰。
  17. The results indicate that the base shear, the interlayer shear, the interlayer displacement of the isolation system is far lower than the results of the base - fixed system under the same condition of the superstructure

    隔震結構的基底剪力、上部結構的層間剪力、層間位移都遠遠小於不隔震結構的計算結果。
  18. A sequence of generating hinges is studies by push - over analysis, as well as base shear. further the structural seismic performance is evaluated clearly by capacity spectrum method

    靜力彈塑性分析（ push - over ）揭示了結構產生塑性鉸順序以及結構承受基底剪力的規律，能力譜法進一步明確地評估了結構的抗震能力。
  19. Seismic response regularities of the structure revealed through the finite element analysis. a sequence of generating hinges is studies by push - over analysis, as well as base shear. further the structural seismic performance is evaluated clearly by capacity spectrum method

    靜力彈塑性分析（ push - over ）揭示了結構產生塑性鉸順序以及結構承受基底剪力的規律，能力譜法進一步明確地評估了結構的抗震能力。
  20. Some useful results are obtained through lots of comparative analysis. the research results illustrate that base isolation structure can reduce the horizontal earthquake response of superstructure effectively compared with traditional technique. this method is very effective, base shear, floor deformation, acceleration of isolation structure is less than no isolation structure

    文中分別考慮不隔震（傳統抗震結構）及以鉛芯疊層橡膠支座作為隔震裝置的基礎隔震結構，對其由地面輸入ei - centro地震波，進行了大量的計算分析比較，得出了一些有益的結論:隔震結構採用橡膠墊隔震支座時具有明顯的隔震效果，它能大大減輕結構的水平地震作用。
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