crack vt. 1.使破裂;敲破,敲碎,砸碎(陶器等);嗑(瓜子等);【化学】裂化(石油等)。 2.把(枪打得、鞭子抽得)噼啪噼啪(等)地响。 3.打开(酒瓶)喝。 4.弄伤,损坏(信用等);弄哑(嗓子);使发狂。 5.说(笑话)。 6.〔口语〕解决;辨认(暗号);破(案)。 7.〔美俚〕兑开(钞票)。 8.〔口语〕闯入。 9.撬开(门)。 10.微启窗户。 11.刻苦攻读。 12.【计算机】非法侵入(他人电脑系统)。 vi. 1.破裂;断掉;(地面等)坼裂;皲裂;缩裂;〔美国〕破晓 (=day cracks)。 2.发坼裂[爆裂]声,(手枪、鞭子等)噼啪噼啪地响。 3.(嗓子)发哑;(发育期)变嗓子。 4.损坏;(精神)受打击。 5.〔Scot., 北英〕谈,谈话;〔俚语〕说笑话;讥讽。 6.【计算机】非法侵入他人电脑系统。 This is a hard nut to crack。 这是一个难解决的问题。 crack sunflower seeds 嗑瓜子。 crack a book 〔美俚〕读书,用功。 crack a bottle with 和…开瓶酒喝。 crack a crib 〔口语〕溜门撬锁(偷窃)。 crack a mark [record] 【美军】打破纪录,创新纪录。 crack a prospect 〔美俚〕推销成功。 crack a smile 〔俚语〕微笑。 crack back 〔美俚〕回嘴。 crack down 〔美俚〕敏捷地做;拼命做。 crack down on 〔美俚〕对…采取严厉措施,对…进行制裁。 crack on 满帆前进;〔俚语〕开足马力前进,飞快前进;继续前进。 crack out laughing 发笑。 crack the lingo 〔美俚〕讲本行行话。 crack the party 〔美俚〕不请自来赴会。 crack up 1. 夸奖;吹捧某人(crack oneself up 自夸,自大)。 2. (人、身体等)疲惫不堪,有气无力;〔美俚〕(飞机)坠毁,撞毁;引起(哄堂)大笑;忍不住大笑;笑痛肚子。 crack wise 〔美国〕讲俏皮话,打哈哈。 get cracking 〔俚语〕开动,动工;动手,开始做。 n. 1.裂缝,裂纹,皲裂,龟裂;【化学】裂化。 2.破裂声,爆裂声,(手枪、鞭子等的)噼啪声;打击声,打击。 3.疵瑕,缺点;精神错乱。 4.(发育期)换嗓,变声。 5.〔口语〕第一流人物;名马;(竞技的)名手;优良的船。 6.〔古、俚〕自大,自夸;〔Scot., 北英〕闲谈;〔pl.〕奇闻。 7.〔美俚〕警句,俏皮话,挖苦话。 8.〔口语〕一会儿,片刻。 9.〔俚语〕溜门撬锁。 Open the window a crack. 把窗子开一条缝。 the crack of a whip 鞭声。 the crack of thunder 雷鸣。 a crack on the head 头上的一击。 There is a crack in your head. 你有点疯啦。 (at) crack of day 〔英方,美〕(在)黎明,天亮时。 crack of doom 世界末日的霹雳信号(till the crack of doom 到世界毁灭时,到最后)。 in a crack 即刻,立刻。 adj. 〔口语〕最好的,第一流的;出名的,当当的。 a crack hand 妙手,能手。 a crack performer 名演员。 a crack player (竞赛等的)能手。 a crack regiment 精锐团。 crack troops 精锐部队。 a crack team 名队。 adv. 噼啪地,啪的一声,尖锐地。 The pistol went off crack. 手枪啪的一声打了出去。
Experimental study on diagonal crack widths of reinforced concrete t - beams with high - strength stirrup 形截面混凝土梁的斜裂缝宽度试验研究
The test result shows the deflection and diagonal crack of recycled aggregate concrete beams are bigger than natural aggregate concrete beams , the shear capacity of recycled concrete beams reduces with the increase of recycled coarse aggregate content , the shear capacity reduces with the increase of shear - span ratio 试验结果表明:再生混凝土梁比普通混凝土梁变形和斜裂缝宽度稍大;随着再生粗骨料取代率的增加,再生混凝土梁的抗剪承载力略有下降的趋势;随着剪跨比的增加,抗剪承载力减小。
From the point of the behavior of spandrel beam in the course of test , there are four clearly stages based on the three characteristic points : bending cracking of floor beams through the column , diagonal cracking of spandrel beams and / or bending cracking of floor beams above the spandrel beams ( including floor ) and bending yield of floor beams through the column . in the last stage , the torque of spandrel beams seems more like an equilibrium torque than a compatibility torque . the law of 从边主梁的受力看,以过柱子次梁的弯曲开裂、边主梁的扭剪开裂以及梁上次梁(包括楼板)的弯曲开裂和过柱子次梁的弯曲屈服为受力特征点划分为四个受力阶段,其中边主梁在过柱子次梁的弯曲屈服后的受扭则更多地具有平衡扭转的性质,而在这以前是协调扭转。
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 正截面开裂前,荷载挠度曲线基本为线性,截面刚度较大;正截面开裂时,裂缝先在纯弯段出现,荷载挠度曲线出现转折点,随着荷载的增加,纯弯段正裂缝的发展以及剪跨段斜裂缝的产生并向梁的受压区加荷点发展,使梁的刚度较截面开裂前减少,荷载挠度曲线也基本为线性直到梁破坏。
In this paper , a two - dimensional analysis of the tanjialiangzi bridge was first performed ; then a segment of the bridge was modeled and a three - dimensional analysis of it were carried out by employing the fem software of ansys ; after a careful analysis of the result of the calculations , the causes of the diagonal cracking in the web of the beam were given out ; and also , in the last part , common steps of damage evaluation of the long - span pc continuous bridges through fem software were summarized 本文首先对谭家梁子大桥作平面计算分析;然后运用ansys软件建立该桥局部梁段的空间有限元模型,并在此基础上进行空间局部有限元分析;通过对计算结果的整理和分析,从设计方面探讨了该桥腹板斜裂缝产生的原因:此后,针对病害成因,本文提出了裂缝修补和腹板加固的方法;最后总结了运用有限元软件分析同类桥梁病害的一般方法。