电大钢结构期末复习测试A及参考答案


     电钢结构模拟测试(A)
    单项选择题(题正确答案序号填入括号题2分计30分)
    1.目前国钢结构设计( )
    A.全部采概率理基础似概率极限状态设计方法
    B.采分项系数表达极限状态设计方法
    C.疲劳计算容许应力幅应力弹性状态计算外采概率理基础似概率极限状态设计方法
    D.部分采弹性方法部分采塑性方法
    2.构件发生断裂破坏前具明显先兆情况( )典型特征
    A.脆性破坏 B. 塑性破坏 C.强度破坏 D.失稳破坏
    3.钢结构动力荷载适应性较强钢材具( )
    A.良塑性 B.高强度良塑性
    C.良韧性 D.质均匀性
    4.沸腾钢镇静钢冶炼浇注方法处( )
    A.冶炼温度 B.冶炼时间
    C.沸腾钢加脱氧剂 D.两者加脱氧剂镇静钢加强脱氧剂
    5.型钢中H型钢工字钢相( )
    A. 两者钢材                     B. 前者翼缘相较宽
    C. 前者强度相较高                  D. 两者翼缘较斜度
    6.采高强度螺栓摩擦型连接承压型连接相螺栓直径条件螺栓孔求( )
    A. 摩擦型连接孔求略承压型连接孔求略
    B. 摩擦型连接孔求略承压型连接孔求略
    C. 两者孔求相
    D. 求
    7.弹性阶段侧面角焊缝应力长度方分布( )
    A.均匀分布 B.端端 C.两端中间 D.两端中间
    8.钢梁底面设置吊杆拉力设计值650kN吊杆通T形连接件荷载传钢梁T形连接件钢梁翼缘板采双排8.8级M20高强度螺栓摩擦型连接预拉力P125kN抗滑移系数0.45高强度螺栓数量应( )
    A.4 B.6 C.8 D.10
    9.摩擦型连接高强度螺栓杆轴方受拉时承载力( )
    A. 摩擦面处理方法关       B. 摩擦面数量关
    C. 螺栓直径关                   D. 螺栓性等级关
    10.计算格构式柱绕虚轴轴弯曲整体稳定稳定系数应根( )查表确定
    A. B.
    C. D.
    11.提高轴心受压构件整体稳定构件截面面积变情况构件截面形式应面积分布( )
    A. 集中截面形心处 B. 远离形心
    C. 意分布影响 D. 集中截面剪切中心
    12.工字形截面梁受压翼缘Q235钢保证局部稳定宽厚限值Q345钢宽厚限值应( )
    A.15更
    B.等15
    C.15更
    D.1515
    13.梁受固定集中荷载作局部承压强度满足求时采( )较合理措施
    A.加厚翼缘
    B.集中荷载作处设置支撑加劲肋
    C.增加横加劲肋数量
    D.加厚腹板
    14.弯矩作实轴面双肢格构式压弯柱应进行( )缀材计算
    A. 强度刚度弯矩作面稳定性弯矩作面外稳定性单肢稳定性
    B. 弯矩作面稳定性单肢稳定性
    C. 弯矩作面稳定性弯矩作面外稳定性
    D. 强度刚度弯矩作面稳定性单肢稳定性
    15.保证屋盖结构( )应根屋盖结构形式(檩体系檩体系托架托架)厂房吊车位置振动设备房屋跨度高度等情况设置支撑系统
    I. 空间整体作提高整体刚度减腹杆计算长度
    II.空间整体作承担传递水荷载减节点板厚度
    III.空间整体作提高整体刚度减弦杆计算长度
    IV.安装时稳定方便承担传递水荷载(风荷载悬挂吊车水荷载震荷载等)
    A. III B. IIII
    C. IIIV D. IIIIV

    二判断题(正确划 √错误划× 题2分计30分)
    1. 承载力极限状态包括构件连接强度破坏疲劳破坏度变形适继续承载状态( )
    2.碳含量钢材性影响般情况着含碳量增高钢材塑性韧性逐渐增高( )
    3.钢材越厚压缩越厚度钢材强度较高塑性击韧性焊接性较 ( )
    4.钢材具两种性质完全破坏形式塑性破坏脆性破坏 ( )
    5.长期承受频繁反复荷载结构连接设计中必须考虑结构疲劳问题( )
    6.承压型高强度螺栓连接螺栓剪坏承压破坏作连接承载力极限状态( )
    7.正面角焊缝相侧面角焊缝破坏强度低塑性变形力( )
    8.静荷载作焊接残余应力影响结构静力强度( )
    9.螺栓排列分列错列两种形式错列较简单整齐布置紧凑连接板尺寸构件截面削弱较 ( )
    10.格构式构件轴心受压构件实现两轴方等稳性刚度抗扭性料较省( )
    11.轴心受力构件强度毛截面均应力达钢材屈服点承载力极限状( )
    12.柱梁连接部分称柱头基础连接部分称柱脚( )
    13.承受轴心荷载构件称受弯构件( )
    14.采加梁截面尺寸提高梁整体稳定性增受压翼缘宽度效 ( )
    15.屋架外形首先取决建筑物途次考虑料济施工方便构件连接结构刚度等问题 ( )

    三简答题(题8分计24分)
    1.钢结构材料结构相具特点?
    2.什情况会产生应力集中应力集中钢材性影响?
    3.实腹式轴心受压构件进行截面选择时应考虑原什?

    四计算题(计16分)
    图示拉弯构件长6000mm轴拉力设计值800kN横均布荷载设计值7kNm设截面削弱钢材Q345( f310Nmm2)构件采普通工字钢I22a截面积A=421cm2重量032kNmWx=310cm3ix=899cmiy=232cm验算截面否满足设计求
    已知:允许长细截面塑性发展系数荷载分项系数10
    公式:

    试题答案评分标准(供参考)

    单项选择题(题正确答案序号填入括号题2分计30分)
    1.C 2.B 3.C 4.C 5.B
    6.A 7.C 8.C 9.C 10.B
    11.B 12.A 13.B 14.D 15.D
    二判断题(正确划 √错误划× 题2分计30分)
    1.(√) 2.(×) 3.(×) 4.(√) 5.(√)
    6.(√) 7.(×) 8.(√) 9.(×) 10.(√)
    11.(×) 12.(√) 13.(×) 14.(√) 15.(×)
    三简答题(题8分计24分)
    简答题点根具体情况酌情分
    1.钢结构材料结构相具特点?
    答:建筑钢材强度高塑性韧性钢结构重量轻材质均匀力学计算假定较符合钢结构制作简便施工工期短钢结构密闭性钢结构耐腐蚀性差钢结构耐热耐火钢结构发生脆性断裂
    2.什情况会产生应力集中应力集中钢材材性影响?
    答:实际钢结构构件时存着孔洞槽口凹角截面突然改变钢材部缺陷等时构件中应力分布保持均匀某区域产生局部高峰应力外区域应力降低产生应力集中形象负温动力荷载作应力集中利影响十分突出引起脆性破坏根源
    3.实腹式轴心受压构件进行截面选择时应考虑原什?
    答:(1)面积分布量开展增加截面惯性矩回转半径提高柱整体稳定承载力刚度(2)两轴方量等稳定达济效果(3)便构件进行连接构造简单制造省工取材方便
    四计算题(计16分)
    题答案点根具体情况酌情分
    解:(1)验算强度
    (4分)

    (4分)
    (2)验算长细
    (4分)
    (4分)
    选截面满足设计求

    请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄After earning his spurs in the kitchens of The Westin The Sheraton Sens on the Bund and a sprinkling of other topnotch venues Simpson Lu fi nally got the chance to become his own boss in November 2010 Sort of The Shanghaiborn chef might not actually own California Pizza Kitchen (CPK) but he is in sole charge of both kitchen and frontof house at this Sinan Mansions'stalwart  It’s certainly a responsibility to be the head chef and then to have to manage the rest of the restaurant as well the 31yearold tells Enjoy Shanghai In hotels for example these jobs are strictly demarcated so it’s a great opportunity to learn how a business operates across the board  It was a task that management back in sunny California evidently felt he was ready for and a vote of confi dence from a company that to date has opened 250 outlets in 11 countries And for added pressure the Shanghai branch was also CPK’s China debut  For sure it was a big step and unlike all their other Asia operations that are franchises they decided to manage it directly to begin with says Simpson  Two years ago a private franchisee took over the lease but the links to CPK headquarters are still strong with a mainlandbased 'brand ambassador’ on hand to ensure the business adheres to its ethos of creating innovative hearthbaked pizzas a slice of PR blurb that Simpson insists lives up to the hype  They are very innovative he says The problem with most fast food places is that they use the same sauce on every pizza and just change the toppings Every one of our 16 pizza sauces is a unique recipe that has been formulated to complement the toppings perfectly  The largely local customer base evidently agrees and on Saturday and Sunday at least the place is teeming The kidseatforfree policy at weekends is undoubtedly a big draw as well as is the spacious secondfl oor layout overlooked by a canopy of green from Fuxing Park over the road  The company is also focusing on increasing brand recognition and in recent years has taken part in outside events such as the regular California Week Still the sta are honest enough to admit that business could be better as good in fact as in CPK’s second outlet in the popular Kerry Parkside shopping mall in Pudong  Sinan Mansions has really struggled to get the number of visitors that were envisaged when it first opened and it hasn’t been easy for any of the tenants here adds Simpson We’re planning a third outlet in the city in 2015 and we will probably choose a shopping mall again because of the better foot traffic The tearooms once frequented by Coco Chanel and Marcel Proust are upping sticks and coming to Shanghai Xu Junqian visits the Parisian outpost with sweet treats One thing the centuryold Parisian tearoom Angelina has shown is that legendary fashion designer Coco Chanel not only had style and glamor but also boasted great taste in food pastries in particular One of the most popular tearooms in Paris Angelina is famous for having once been frequented by celebrities such as Chanel and writer Marcel Proust Now Angelina has packed up its French ambience efficient service and beautiful comforting desserts and flown them to Shanghai At the flagship dinein and takeout space in Shanghai everything mimics the original tearoom designed from the beginning of the 20th century in Paris the height of Belle Epoque The paintings on the wall for example are exactly the same as the one that depicts the landscape of southern France the hometown of the owner and the small tables are intentional imitations of the ones that Coco Chanel once sat at every afternoon for hot chocolate The famous hot chocolate known as L’Africain is a luxurious mixture of four types of cocoa beans imported from Africa blended in Paris and then shipped to Shanghai It’s sinfully sweet rich and thick as if putting a bar of melting chocolate directly on the tongue and the fresh whipped cream on the side makes a light but equally gratifying contrast It is also sold in glass bottles as takeaway The signature MontBlanc chestnut cake consists of three parts the pureed chestnut on top the vanilla cream like stuffing and the meringue as base Get all three layers in one scoop not only for the different textures but also various flavors of sweetness The dessert has maintained its popularity for a century even in a country like France perhaps the world’s most competitive place for desserts A much overlooked pairing is the ParisNew York choux pastry and N226 chocolate flavored tea The choux pastry is a mouthful of airy pecanflavored whipped cream while the tea a blend of black teas from China and Ceylon cocoa and rose petals offers a more subtle fragrance of flowers and chocolate Ordering these two items featuring a muted sweetness makes it easier for you to fit into your little black dress Breakfast brunch lunch and light supper are also served at the tearoom a hub of many cultures and takes in a mix of different styles of French cuisines according to the management team The semicooked foie gras terrine is seductive and deceptive It’s generously served at the size and shape of a toast while the actual brioche toast is baked into a curved slice dipped with fig chutney The flavor however is honest strong smooth and sublime And you don’t actually need the toast for crunchiness This is the season for high teas with dainty cups of fine china and little pastries that appeal to both visual and physical appetites But there is one high tea with a difference and Pauline D Loh finds out just exactly why it is special Earl Grey tea and macarons are all very well for the crucial recuperative break inbetween intensive bouts of holiday season shopping And for those who prefer savory to sweet there is still the selection of classic Chinese snacks called dim sum to satisfy and satiate High tea is a meal to eat with eye and mouth an inbetween indulgence that should be light enough not to spoil dinner but sufficiently robust to take the edge off the hunger that strikes hours after lunch The afternoon tea special at ShangXi at the Four Seasons Hotel Pudong has just the right elements It is a pampering meal with touches of luxury that make the high tea session a treat in itself Whole baby abalones are braised and then topped on a shortcrust pastry shell a sort of Chinese version of the Western volauvent but classier Even classier is the dim sum staple shrimp dumpling or hargow upgraded with the addition of slivers of midnight dark truffles This is a master touch and chef Simon Choi who presides unchallenged at ShangXi has scored a winner again Sweet prawns and aromatic truffles — what’s not to love His masterful craftsmanship is exhibited in yet another pastry — a sweet pastry that is shaped to look like a walnut but which you can put straight into the mouth It crumbles immediately and the slightly sweet nutty morsel is so easy to eat you’ll probably reach straight for another My favorite is the dessert that goes by the name yangzhi ganlu or ambrosia from the gods The hotel calls it chilled mango cream with sago pomelo and bird’s nest – made with ingredients that resonate with every female soul It does taste like ambrosia with the sweetsour fragrance of the mango forming the first layer of taste and sensation and the pomelo sacs and sago pearls providing the tactile contrast The bird’s nest — it’s the ingredient that gilds the lily since it is supposed to nourish and nurture a perfect complexion For those unfamiliar with this exotic ingredient the bird’s nest is not a bundle of twigs but is instead the dried secretion that cave swifts use to build their nest Technically it’s bird saliva but the Chinese believe that it has collagenboosting properties essential to beauty To me it just tastes good adding a slight gelatinous crunch to the back of the teeth There is also a baked mushroom puff pastry that includes the highly prized Matsutake or pine mushroom You also get a choice of teas but I strongly recommend the aged Pu’er from Yunnan province It is a mellow tea that will go perfectly with the rich little nuggets and will warm you up on a cold afternoon Incidentally the general guide is green tea such as Longjing or Dragonwell for the hot season semifermented teas like Wulong or Iron Buddha for autumn and more warming teas like Pu’er for winter The ShangXi afternoon tea costs 228 yuan (37) per person and 388 yuan for the more opule

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