failure n. 1.失敗 (opp. success); 不及格。 2.不足,缺乏;衰退;【醫(yī)學】衰竭。 3.不履行,玩忽。 4.破產(chǎn),倒閉;(銀行等的)無力支付。 5.失敗的事;失敗者。 6.【物理學】失效;【機械工程】斷裂,破壞,變鈍。 F- is the mother of success. = F- teaches success. 〔諺語〕失敗是成功之母。 a failure of rain 雨量缺乏。 failure in duty 不盡職。 a crop failure = (a) failure of crops 收成不好,歉收。 failure of electricity 停電。 a failure of issue 無后(嗣)。 failure of eyesight 視力減退。 He is a failure as a teacher. 他教書不行。 heart failure 【醫(yī)學】心力衰竭。 a social failure (社會上的)失敗者。 end in failure = meet with failure 終歸失敗。 invite failure 招致失敗。
Finally , an applied formula of beam ' s shear resistance is advanced when the beam ' s shear failure model is the shear - compression failure 最后把剪壓破壞范圍內(nèi)的理論抗剪公式進行簡化,提出一實用的抗剪計算公式。
Making use of the " truss + arch " mechanical model , the range of the three shear failure models ( shear - compression failure , diagonal - tension failure and arch - rib failure ) is divided quantitatively , and the theoretical formula of shear resistance of beams and columns is educed 利用修正的桁架+拱抗剪力學模型,定量的劃分了梁柱構(gòu)件受剪破壞三種狀態(tài)(剪壓破壞、斜拉破壞和斜壓破壞)的范圍,并由此推得梁柱構(gòu)件抗剪的理論公式。
Make using of the critical point of the arch failure transiting to the tooth failure ( which is also the point when the non - stirrup beam ' s shear bearing capacity arrives to its minimum ) which is advanced in the arch - tooth theory of beams without shear reinforcement by g . kani and the critical point of the diagonal - tension failure transiting to the shear - compression failure which is advanced in the anti - theory , the minimum shear resistance of general bea ms which is destroyed in the range of shear - compression failure is advanced 利用g . kani提出的拱?齒理論中的無腹筋梁的拱齒破壞的分界點(也就是無腹筋粱的最小抗剪承載力點) ,再結(jié)合前述理論中所提出的梁剪壓破壞和斜拉破壞的分界點,提出了梁在延性的剪壓破壞范圍內(nèi)的最小抗剪承載力,并與混凝土結(jié)構(gòu)設(shè)計規(guī)范gb50010 - 2002比較,結(jié)果吻合較好。
At first , the experiment carried out by tianjin university has been analysed according to the " nonlinear balance trying calculation " method , and the values of yield load and ultimate load agree with the test result better , and the curve of bending moment - curvature , bending moment - deflection can agree with the results . the second , the simplified formula for evaluation the ultimate flexural capacity of cfrp strengthened rc members is presented according to the three probable failure modes ( compression failure ; cfrp rupture ; crushing of the concrete in compression before yielding of the reinforcing steel ) . it is applicable to both singly and doubly reinforced rectangular sections , as well as flanged sections 首先利用鋼筋混凝土非線性平衡試算法對天津大學試驗進行了理論分析,所得分析值與試驗結(jié)果相比,加固梁的屈服荷載、極限荷載能夠很好地吻合,彎矩曲率關(guān)系曲線及彎矩撓度關(guān)系曲線較為吻合;其次,為了滿足實際工程的需要,根據(jù)碳纖維布加固構(gòu)件可能發(fā)生的三種破壞形態(tài)(壓區(qū)混凝土壓碎破壞、碳纖維布拉斷破壞以及受拉鋼筋尚未屈服時壓區(qū)混凝土已壓碎破壞) ,區(qū)別三種鋼筋混凝土構(gòu)件截面形式(單筋矩形截面、雙筋矩形截面、 t形截面) ,分別給出了碳纖維布加固混凝土構(gòu)件抗彎承載力的簡化計算公式和適用條件,并進一步探討了這三種截面形式下進行加固設(shè)計和復核的步驟。
The minimum shear resistance of beams in the paper is close to the one in the code for design of concrete structures " gb50010 - 2002 ' . according to the actual project , the destroy of 448 kinds of beams are analyzed by computer by taking account of the effective coefficient " " of the strength of concrete confined by hoops , the relationship with the section property of beams , the critical point of the arch - rib failure transiting to the shear - compression failure which is advanced in the anti - theory , and the contribution to the beam ' s shear resistance of the concrete in the shear - compression zone 引用箍筋約束混凝土的有效系數(shù),利用其與梁截面特性的關(guān)系并結(jié)合理論分析中提出的梁剪壓破壞與斜壓破壞的分界點,同時考慮了剪壓區(qū)混凝土的抗剪貢獻,從工程實際出發(fā),編程擬算了448種梁構(gòu)件的破壞情況,計算結(jié)果表明,梁發(fā)生在剪壓破壞范圍內(nèi)的最大抗剪承載力值比混凝土結(jié)構(gòu)設(shè)計規(guī)范gb50010 - 2002值略高。
In terms of strength and ductility , the concept of specified yield point is put forward . based on the principle that under the same condition ( that is , the size of cross section , material strength and reinforcement ratio are identical ) , the resultant ultimate moment must be identical , the compression failure of frp reinforced concrete beam is equal to the tension failure for the viewpoint of design and calculation 從強度與延性兩方面的綜合考慮,提出了纖維增強塑料筋名義屈服點的概念,對發(fā)生受壓破壞的纖維增強塑料筋混凝土梁,按照同樣條件下(截面尺寸、材料強度、截面配筋率等均相同)截面承載力相等的原則等效轉(zhuǎn)化為受拉破壞進行設(shè)計與計算,以此確定纖維增強塑料筋的強度折減系數(shù)_ f 。