CIV6115 钢筋混凝土梁设计

这包括钢筋混凝土梁ABC和钢梁CD。梁支撑在A、B和D处基础的销支撑上，并在C处通过可以传递剪切力但不传递力矩的连接。跨度为：AB-L1米BC–L2米CD–L3米钢筋混凝土梁具有矩形横截面，总深度h mm，总深度b mm宽度整个结构承受均匀分布的特征永久线荷载gkN/m，以及均匀分布的特征施加的线载荷q kN/m。还有一个梁CD跨中的特征外加点荷载Q kN
CIV6115 Coursework 2022-23Figure 1 shows a structural system ABCD.This comprises a reinforced concrete beam ABC and a steel beam CD.The beams are supported on pin supports at foundations at A, B and D and are connected at C by aconnection which can transfer shear forces but no moment.The spans are:

AB - L1 metres
BC – L2 metres
CD – L3 metres

The reinforced concrete beam has a rectangular cross-section, h mm overall depth and b mm overallwidth.

1.The entire structure

The entire structure is subjected to a uniformly distributed characteristic permanent line load gkN/m, and a uniformly distributed characteristic imposed line load, q kN/m. There is also acharacteristic imposed point load Q kN at midspan on beam CDFigure 1 – Structural SystemPart 2 – Structural Design (70% of the overall module marks)a) Using EC2 and EC3 you are to present calculations to determine the following (comprising 60% ofthe final marks)1) The longitudinal steel reinforcement required to provide sufficient flexural strength in thereinforced concrete beam at support B2) The diameter and spacing of shear links required to provide sufficient shear resistance in thereinforced concrete beam at support B3) The lowest mass of standard UK Universal Beam (UB) which has sufficient cross-sectionalmoment resistance to resist the design bending at the centre of span CD and the designshear force at C4) An assessment of whether the steel beam chosen in task 3 above can resist the designmoment when lateral-torsional buckling effects are taken into account. You should assumethat the beam is restrained laterally and torsionally at supports C and D and also at midpointof span CD. Note that if you decide that the beam fails this check, you do NOT have to repeatthe calculations with a stronger beam section.b) You should present with your calculations a sketch showing the cross-section of the concretebeam at B, with the longitudinal and shear reinforcement indicated. (10% of the final marks.)Material dataConcrete is strength class C35/40Cover is 30mmCharacteristic strength of reinforcing bars is 500MPaSteel beam grade is S355Elastic Modulus of structural steel is 210GPa.Shear Modulus of structural steel is 81GPa.The correct figures for the maximum design values of the bending moments and shear forces at Band in span CD are given for each student in the table at the end of this document. Please use thesevalues in this coursework.L1(m) L2(m) L3(m) b(mm) h(mm)Max4.4 2.6 4 400 740 144.3 -424.0 106.8 219.4Ps:1) I have given each of you the correct design values of the Ultimate Limit State (ULS) bendingmoments and shear forces that you should use in the design of the concrete and steel beams. Thosemoments and shear forces are calculated from the individual values for the dimensions andcharacteristic loads given to each of you for Part 1 of the coursework, with suitable partial safetyfactors. Therefore, if you decide that you need to use the loading for any calculations in your Part 2submission, you should use the loading that was allocated to you in part 1.Part 1 figure:2) Item 3 on PArt 2 of the Coursework requires you to select a steel beam which has sufficientSTRENGTH of cross-section to resist the ULS bending moment and shear strength.In a real design,you would also need to perform a number of serviceability limit state (SLS) checks, such as deflectionor vibration. For the purpose of this coursework, you do not need to submit any SLS calculations.3) Here is a copy of the Tata Steel sections booklet which you will find useful for the coursework.Advance to BS5950 Sept 13.pdfThis file is a very useful guidance document from the Steel Construction Institute, givening guidanceon a useful method for calculating the C1 parameter.NSCTechNov13.pdf
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