crack vt. 1.使破裂;敲破,敲碎,砸碎(陶器等);嗑(瓜子等);【化學(xué)】裂化(石油等)。 2.把(槍打得、鞭子抽得)噼啪噼啪(等)地響。 3.打開(酒瓶)喝。 4.弄傷,損壞(信用等);弄啞(嗓子);使發(fā)狂。 5.說(笑話)。 6.〔口語〕解決;辨認(rèn)(暗號);破(案)。 7.〔美俚〕兌開(鈔票)。 8.〔口語〕闖入。 9.撬開(門)。 10.微啟窗戶。 11.刻苦攻讀。 12.【計算機(jī)】非法侵入(他人電腦系統(tǒng))。 vi. 1.破裂;斷掉;(地面等)坼裂;皸裂;縮裂;〔美國〕破曉 (=day cracks)。 2.發(fā)坼裂[爆裂]聲,(手槍、鞭子等)噼啪噼啪地響。 3.(嗓子)發(fā)??;(發(fā)育期)變嗓子。 4.損壞;(精神)受打擊。 5.〔Scot., 北英〕談,談話;〔俚語〕說笑話;譏諷。 6.【計算機(jī)】非法侵入他人電腦系統(tǒng)。 This is a hard nut to crack。 這是一個難解決的問題。 crack sunflower seeds 嗑瓜子。 crack a book 〔美俚〕讀書,用功。 crack a bottle with 和…開瓶酒喝。 crack a crib 〔口語〕溜門撬鎖(偷竊)。 crack a mark [record] 【美軍】打破紀(jì)錄,創(chuàng)新紀(jì)錄。 crack a prospect 〔美俚〕推銷成功。 crack a smile 〔俚語〕微笑。 crack back 〔美俚〕回嘴。 crack down 〔美俚〕敏捷地做;拼命做。 crack down on 〔美俚〕對…采取嚴(yán)厲措施,對…進(jìn)行制裁。 crack on 滿帆前進(jìn);〔俚語〕開足馬力前進(jìn),飛快前進(jìn);繼續(xù)前進(jìn)。 crack out laughing 發(fā)笑。 crack the lingo 〔美俚〕講本行行話。 crack the party 〔美俚〕不請自來赴會。 crack up 1. 夸獎;吹捧某人(crack oneself up 自夸,自大)。 2. (人、身體等)疲憊不堪,有氣無力;〔美俚〕(飛機(jī))墜毀,撞毀;引起(哄堂)大笑;忍不住大笑;笑痛肚子。 crack wise 〔美國〕講俏皮話,打哈哈。 get cracking 〔俚語〕開動,動工;動手,開始做。 n. 1.裂縫,裂紋,皸裂,龜裂;【化學(xué)】裂化。 2.破裂聲,爆裂聲,(手槍、鞭子等的)噼啪聲;打擊聲,打擊。 3.疵瑕,缺點;精神錯亂。 4.(發(fā)育期)換嗓,變聲。 5.〔口語〕第一流人物;名馬;(競技的)名手;優(yōu)良的船。 6.〔古、俚〕自大,自夸;〔Scot., 北英〕閑談;〔pl.〕奇聞。 7.〔美俚〕警句,俏皮話,挖苦話。 8.〔口語〕一會兒,片刻。 9.〔俚語〕溜門撬鎖。 Open the window a crack. 把窗子開一條縫。 the crack of a whip 鞭聲。 the crack of thunder 雷鳴。 a crack on the head 頭上的一擊。 There is a crack in your head. 你有點瘋啦。 (at) crack of day 〔英方,美〕(在)黎明,天亮?xí)r。 crack of doom 世界末日的霹靂信號(till the crack of doom 到世界毀滅時,到最后)。 in a crack 即刻,立刻。 adj. 〔口語〕最好的,第一流的;出名的,當(dāng)當(dāng)?shù)摹?a crack hand 妙手,能手。 a crack performer 名演員。 a crack player (競賽等的)能手。 a crack regiment 精銳團(tuán)。 crack troops 精銳部隊。 a crack team 名隊。 adv. 噼啪地,啪的一聲,尖銳地。 The pistol went off crack. 手槍啪的一聲打了出去。
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縫寬度試驗研究
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 試驗結(jié)果表明:再生混凝土梁比普通混凝土梁變形和斜裂縫寬度稍大;隨著再生粗骨料取代率的增加,再生混凝土梁的抗剪承載力略有下降的趨勢;隨著剪跨比的增加,抗剪承載力減小。
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 從邊主梁的受力看,以過柱子次梁的彎曲開裂、邊主梁的扭剪開裂以及梁上次梁(包括樓板)的彎曲開裂和過柱子次梁的彎曲屈服為受力特征點劃分為四個受力階段,其中邊主梁在過柱子次梁的彎曲屈服后的受扭則更多地具有平衡扭轉(zhuǎn)的性質(zhì),而在這以前是協(xié)調(diào)扭轉(zhuǎn)。
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 正截面開裂前,荷載撓度曲線基本為線性,截面剛度較大;正截面開裂時,裂縫先在純彎段出現(xiàn),荷載撓度曲線出現(xiàn)轉(zhuǎn)折點,隨著荷載的增加,純彎段正裂縫的發(fā)展以及剪跨段斜裂縫的產(chǎn)生并向梁的受壓區(qū)加荷點發(fā)展,使梁的剛度較截面開裂前減少,荷載撓度曲線也基本為線性直到梁破壞。
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 本文首先對譚家梁子大橋作平面計算分析;然后運用ansys軟件建立該橋局部梁段的空間有限元模型,并在此基礎(chǔ)上進(jìn)行空間局部有限元分析;通過對計算結(jié)果的整理和分析,從設(shè)計方面探討了該橋腹板斜裂縫產(chǎn)生的原因:此后,針對病害成因,本文提出了裂縫修補和腹板加固的方法;最后總結(jié)了運用有限元軟件分析同類橋梁病害的一般方法。