Obtain the moment-curvature relationship of given cross- section through the points of cracking of concrete, yielding of reinforcing bars and crushing of concrete. a) For beam section(N=0)
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- You are to evaluate the feasibility of a cencrete infill in a hollow structural steel section subjected only to pure berding Specifically, you are tasked to determine if there will be an increase in the bending mament capacity from a hollow structural square steel section with the following dimensions shown to a concrele filled steel tube 6 mm 100 mm Material Properties: Yield stress af Steet fy, steel - 420MPa Etaul = 200G Pa Maximum compressive strength of Concrete: fe = 27M Pa Eurede = 4700VT.(e und Eanerate in MPa Under elastic stress analysis, the stress distribution within the concrete filed steel tube is as follows, NA o, - EE, Steel Stress Concrete below the NA Is not considered for analysis Concrete Stress Distribution Distribution This stress distribution is for the untransformed cross section. Moreover, since concrele carry little to na tensile stresses, the portion of the concrete below the neutral axis which resist tensile stresses will nat be considered in the anahlysis…2. From the figure shown, fc' = 20 MPa, fs = 140 MPa, and n = 12. Determine the moment capacity of concrete and steel (Cracked Analysis Only) 750mm IDOM 40bmm 2-32 mm (Gomm Ssomm 2uo mmFotoğraflar - Ekran Görüntüsü (10)_LI.jpg Tüm fotoğrafları görüntüle + Şuraya ekle: Z Düzenle ve Oluştur v E Paylaş The stress-strain diagram of a reinforcement steel having a cross-sectional diameter of 12 mm diameter and 100 mm gage length is determined after its tensile strength test as follows. Based on the stress- strain diagram determine the followings properties of the material (Poisson's ratio of the material is 0.32) : 600 a) Modulus of elasticity 550 500 b) Yield strength 450 c) Toughness 400 350 d) Resilience 300 e) Shear modulus 250 200 f) Bulk modulus 150 g) Ductility as described by 100 percent change in length 50 0.01 0.02 O.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 Strain 18:12 18.01.2021 10 Stress, MPa
- For each of the problems, draw: section + strain profile + stress profile + resultants. Follow sample below. N CONCRETE f 4aoopet GENE Go STEEL Ig. b. 12,423i From ELNTIC BENDING STeEss FORNULA S. - Mce : fI,• 44.6 t-wip G CRACKING MOMENT 0,4 0,000s 3605 K 12,423 in VOLUME OF 30 COMPRESSE TRESSES C- (c) h. 2 T.c (CRACKINA) STRAINS STRESSES RESULTANTS sertion G CRACKING o. MeQuestion 2A composite bar is made up of a steel strip 2 mm thick and 12 mm wide, sandwichedbetween two aluminium strips each 3 mm thick and 12 mm wide. The three strips areheld together by two rivets of 5 mm diameter each.2.1 Make a neat detailed sketch of the assembly.2.2 If the three strips are fastened together at 15 0C, determine the shear stress set up inthe rivets when the temperature is raised to 21 0C.Note: The resistance of a rivet in double shear may be taken as 1.75 times the resistancein single shear.(For steel: E = 200 GPa and α = 11×10 -6/ 0C)(For aluminium: E = 70 GPa and α = 22×10-6/0C)Assuming concrete is un-cracked. Determine the cracking moment of the section. E = 2*10°MPa E = 2*10*MPa f' = 20MPA 300 mm 500 mm 3#20 60 mm1
- ASAP DONT REJECT ME, I'LL GIVE UPVOTE THANK YOUU Solve the basic development lengths in tension for the following deformed bars embedded in normal-weight concrete. State if you have assumptions. (a) 12mm bar dia; 32 mm bar dia. fy = 41.4 MPa fy = 413.7 MPa (b) 44mm bar dia; 57 mm bar dia. f c = 28 MPa fy = 552 MPac) Find the stresses in the concrete and the reinforcement for the following applied moments: (i) – M1= 35kN.m and (ii) – 120kN.m Cross-section: width height Modulus of elasticity: concrete reinforcement Reinforcement: depth area b:= 300-mm h := 520-mm Ec:= 30-GPa Es:= 200-GPa d:= 460-mm As 1470-mm 2 h d b2. Tensile strength of concrete is about: (20-35)% of compressive strength (45-70)% of compressive strength None of the above. Tension controlled section Balanced section Compression-controlled section 4- The reduction factor (0) is equal to 0.9 if the: Es 2 Ety + 0.003 Es S Ety + 0.003 Es Ety 5- The design method which use the factored loads is - Working stress method - Ultimate design Method - None of above 6- If p< Po therefore the section is - Under reinforced - Over reinforced - None of above
- concrete and Steel are two types of constru ction mamerial with distinctive features AMong those is their characteristics in handling Stress,asshown· * Ca) (6) 430 MB 36 MPa 300 MPa 0-15e 6.3e 8.4e Stress - strain groph of two matonaln Differentiate these graphs based on mateñal represented ?SIT. B: Determine the tensile steel ratio of a given conditions if concrete strength f'. = 28 MPa and steel yield strength fy 4. if the tensile strain is Es = fy/Es upon crushing of concrete at a strain of 0.003. C. 0.02833 A. 0.01567 B. 0.02161 D. 0.02125 if the tensile strain is limited to 0.004 upon crushing of concrete at a strain of 0.003. A. 0.01567 B. 0.01548 5. 6. Minimum as required by NSCP 2015. C. 0.00313 D. 0.00405 A. 0.00333 B. 0.00276 = 420 MPa. C. 0.02778 D. 0.02064 uniformlyThe T-beam has the following properties: flange thickness = 110 mm flange width = 700 mm web width = 400 mm web height = 250 mm f'c = 28 Mpa a) Calculate the stresses in concrete at uncracked stage under 100 kN-m. b) Calculate the cracking moment. c) Determine the balanced steel area and balanced ultimate moment. The steel is placed 80 mm from its cg up to extreme fiber with yield strength of 414 MPa. NOTE: Please answer the question correctly, if you are not sure about the answer(s) please skip the question. Please box the final answer(s) Thank you