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Wide-Flange Sections or W Shapes -40, 40, 40, 3R 29, 5 si Units 90 30, ,, 27, 26, r asis 8 49 3 3 4 5 2 DesignationAra Dept thickness width thickmess 4 50. 54 14 73 STA 1% 195 120 13 95 S8 45 28 200 87 37 ,0 198 ese 95 .9 .9 그 250 | | |-- 4 24 .8-68 16 75 2 100 23 012 125 92-n 86 43 202磊22- 3 75 45 86 196 26 220 79 160 1-102 82 300 65 45 64 65 42 37 21 104 87 39 28 22 75 87 24 ℃| mm 220 zzi 210 210 201 201 200 62 197 52 180 53 150 |㎡|朋$10 360 $20 980 100 150 200 4 750 980 190 划惻$30剄180 B4N 000 200 360 400 700 220 1197542 432321 45 39 33 120 74 67 39 3 24 21 140 HO 67 85 74 67 53 46 39 79 64 57 100 86 71 99 46 28 22 18 22 37 30 24 50 50 50

A steel beam AB is designed to stop the oncoming railroad car as shown in Figure 4, which has a mass of 10000 kg and is moving towards it at v-0.5 m/s. The beam is simply supported with only horizontal forces occur at A and B, and impacted at its centre by the car. Assume that the railroad car and the supporting framework for the beam remain rigid Given data. Est-200 GPa and ơallo,-250 MPa [Rasuk keluli AB di rekabentuk untuk memberhentikan keretapi yang datang seperti ditunjukkan dalam Gambarajah 4, yang mempunyai jisim 10000 kg dan bergerak menuju padanya pada v 0.5 m/s. Rasuk yang disokong mudah dan hanya daya mendatar terjadi pada A and B telah dihentam pada pusat rasuknya oleh keretapi. Andaikan bahawa keretapi dan penyokong kerangka kerja untuk rasuk masih tegar. Diberikan Est-200GPa, dan σ,-250 MPa.] (a) Calculate the maximum deflection of the beam Hitungkan pesongan maksimum rasuk.J (4 Marks/Markah) (b) Determine whether the beam can support the maximum stress developed from the impact Tentukan samada rasuk dapat menampung tegasan maksimum yang terhasil daripada hentaman.1 (10 Marks/Markah) (c) Regarding the beam design, propose suitable parameters changes in order to reduce the maximum stress. Justify your answer. Berdasarkan rekabentuk rasuk, cadangkan perubahan parameter-parameter yang sesuai untuk mengurangkan tegasan maksimum. Justifikasi jawapan anda.] (6 Marks/Markah) v- 0.5 m/s 200 mm Figure 4 Gambarajah 4]