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。
In addition , the calculating methods about the gap of the connectors and the maximum width of crack are discussed in the thesis 另外,作者对组合梁剪力连接件的设计理论及组合梁最大裂缝宽度计算方法作了逐一地探讨。
The static load test was done on the frame beam strengthened by cfrp with frame joint anchored in different mode , and the hearing capacity , deflection and width of crack was surveyed 摘要对采用不同梁端锚固方式的碳纤维布加固框架梁进行静载试验研究,在承载力、挠度及裂缝开展等方面进行了综合比较和分析。
Utilizing the principle of the smoothshaft to open 0 . 4 mm crankshaft to the width of crack : ( 1 ) when it compares with one position crack , crankshaft natural frequency as crack depth than increase and reducing constantly 利用光轴的原理对裂纹宽度为0 . 4mm的曲轴进行研究得出: ( 1 )裂纹同一位置比时,曲轴固有频率随着裂纹深度比的增大而不断减小。
The cast - in - place slab with large - area without special requirement can work with cracks , but the largest crack width must be less than that stipulated in the code of gb50010 - 2002 . hence , the control principle of cast - in - place slab with large - area is to limit the crack , that is , to control the width of crack in the allowable range as stipulated by the code 在规范gb50010 ? 2002中规定无特殊使用和工艺要求的大面积现浇楼盖结构允许带裂缝工作,因此,大面积现浇楼盖结构裂缝控制的原则是限裂,即限制裂缝开展宽度在规范规定的允许最大裂缝宽度范围内。
According to test of 6 hrb400 reinforced concrete beams and a hrb335 reinforced concrete beam , the flexural strength of members with different ratio are studied , and the crack and deflection behaviors under the state of serviceability are analyzed . the developments , the fracture intervals and the width of cracks have been observed 通过hrb400钢筋作受力主筋的6根受弯梁和1根hrb335级钢筋混凝土梁的试验研究,着重分析了在不同配筋率下构件的受弯承载力及正常使用下裂缝与挠度问题,对使用hrb400钢筋的受弯梁的裂缝性能进行统计分析。
At first , ploygon aggregate structure of concrete is randomly generated in two - dimensional plane with monte carlo method on the meso - level . then , the growth process of a crack of concrete 3 - point bending beam specimen is analyzed by fem , according to the criterion of maximum circumferential tensile stress . and the path of crack to spread in mortar , aggregate and interfaces of them is gained by the ultimate fracture criteria in construction standard that the width of crack should not be more than 0 . 2mm 首先,在细观层次上,根据蒙特卡罗随机抽样原理,在二维平面上建立了混凝土多边形随机骨料结构模型,然后采用有限元计算方法,根据最大周向正应力准则,对三点弯曲梁构件进行了开裂过程的模拟,并以建筑规范中构件裂缝小于0 . 2mm的要求为最终破坏标准,得出了裂纹在基质、骨料及界面的扩展路径。
Steel fiber scatters stress converging in the area of the top end of tiny cracks , restrict the occurrence and development of cracks , diminishes the width of cracks , and enhances the integrity of concrete with the occurrence of cracks via the effect of felting between concrete and steel fiber , and consequently the strength of concrete that resists compression , tension , and shear force increases obviously , and the capability of concrete that resists compact , and fatigue , and the ductility and durability of fissured concrete improve 钢纤维削弱了混凝土微裂缝尖端的应力集中、限制并约束裂缝的产生和开展、减小裂缝宽度、尤其是通过粘结作用提高了裂后混凝土的整体性,从而使混凝土的抗拉、抗弯、抗剪强度显著提高,其抗冲击、抗疲劳、裂后韧性和耐久性也有较大程度的改善。
On the base of the research about the prestressed concrete structures at chongqing jianzhu university , a convenient and practical way to control the cracks is introduced in the pages , which is called the method of nominal tension stress that control the width of cracks by the nominal tension stress ftk under the working loads and the limited loads 文中在参考重庆建筑大学多年研究成果的基础上,通过研究四榀预应力框架梁的裂缝发展情况,推荐了一套了实际结构工程设计中方便的裂缝控制方法? ?以名义拉应力ftk控制短期荷载及长期荷载作用下预应力梁的裂缝要求。