作業(yè)參考答案及考試范圍

1、P1073.3試設(shè)計(jì)如圖所示雙角鋼和節(jié)點(diǎn)板間的角焊縫連接。鋼材Q235B，焊條E43型，手工焊，軸心拉力設(shè)計(jì)值N=500kN（靜力荷載）。①采用側(cè)焊縫；②采用三面圍焊。解：角焊縫的強(qiáng)度設(shè)計(jì)值，焊縫內(nèi)力分配系數(shù)為。2160wffNmm?120.700.30KK??焊角尺寸：取maxminminmax(1~2)8(1~2)7~61.51.5104.74ffhtmmmmmmhtmm????????6fhmm?①采用兩邊側(cè)焊縫（轉(zhuǎn)角處做繞角焊）

2、：，110.7500350NKNkN?????220.3500150NKNkN?????肢背計(jì)算長度：，??；31135010260.420.720.76160wwffNlmmhf??????????1270wlmm?肢尖計(jì)算長度：，??；31215010111.6120.720.76160wwffNlmmhf??????????2120wlmm?②采用三面圍焊縫：正面角焊縫的長度等于相連角鋼肢的寬度，即。390wlbmm??3320.72

3、0.76901.22160147.57wfwffNhlfkN??????????????1132231147.570.750035073.79276.21221147.570.350015073.7976.2122NKNNkNNKNNkN????????????????，??；311276.21106205.516211.5120.720.76160wfwffNlhmmhf??????????????1220wlmm?，取。32276.2

4、110656.70662.7020.720.76160wfwffNlhmmhf??????????????270wlmm?P1073.4有一托角鋼，兩邊用角焊縫與柱相連，如圖所示，鋼材為Q345A，焊條E50型，手工焊，試確定焊縫厚度（焊縫有繞角，焊縫長度可不減2hf）。已知：外力設(shè)計(jì)值N=400kN。解：角焊縫的強(qiáng)度設(shè)計(jì)值，，2200wffNmm?20emm?。400NkN?4000.028MNekNm??????彎矩產(chǎn)生的正應(yīng)力：3

5、3222668101060022200feweeMNmmhlhh?????????豎向力產(chǎn)生的剪應(yīng)力：3240010100022200feweeNNmmhlhh???????應(yīng)滿足:2222260010001241868.851.22fwffeeefhhh???????????????????????????5.57ehmm??7.950.7efhhmm???綜上所述取。minmax1.51.5186.36fhtmm???8fhmm?P

6、1073.6如圖所示梁與柱的連接中，鋼材為Q235B，彎矩設(shè)計(jì)值M=100kN.m，剪力設(shè)計(jì)值V=600kN，試完成下列設(shè)計(jì)和驗(yàn)算：（1）剪力V由支托焊縫承受，焊條E43型，手工焊，求焊縫A的高度hf；（2）彎矩M由普通螺栓承受，螺栓直徑24mm，驗(yàn)算螺栓是否滿足要求。對x軸慣性矩：23220x0410.812012()2302(1202)122122115200446520561720thIbthtcm????????????????

7、??????????對x軸截面模量：356172029060212022xxIWcmh??????1、正應(yīng)力驗(yàn)算：622max31674.910176.062051.05906010xnxMNmmfNmmW??????????（，）2016tmm??2205fNmm?滿足。2、剪應(yīng)力驗(yàn)算：6601.99210339.962222yPgLVkN??????00064111111()12008120030020(120020)2422421

8、44000036600005.110xShthbthtmm??????????????????????3622max6339.96105.11038.61255617.2108yxvxVSNmmfNmmIt?????????????（，）滿足。816tmm??2125vfNmm?3、局部壓應(yīng)力驗(yàn)算：梁在支座處設(shè)有支撐加勁肋，不用驗(yàn)算支座處局壓。52150520250ZyRlahhmm???????1.0??（，）321.06601033

9、02158250cZFfNmmtl?????????????816tmm???2215fNmm?不滿足。4、對梁腹板計(jì)算高度邊緣處折算應(yīng)力驗(yàn)算：621161674.910600178.905617.210xnMyNmmI????????631300206103.6610Smm?????362116330103.661026.95617.2108xVSNmmIt????????????2330cNmm??不滿足。222222213178.

10、90330178.90330326.932005.21108900590372170.8384039.04289.891.1215236.5ZccfNmm?????????????????????????????5、剛度驗(yàn)算：2max(200300)1011.6610125020.751270.7548kMkNm??????????2266561270.7510101010.982510102.06105617.210400kxMllm