Тест 2.3 Reinforced concrete beam under distributed load

Verification of the LIRA-FEM software / Тест 2.3 Reinforced concrete beam under distributed load / Analytical solution: Central Research Institute of Industrial Buildings Gosstroy of the USSR. Manual for the design of concrete and reinforced concrete structures made of heavy and lightweight concrete without prestressing of the reinforcement (to SNiP 2.03-84), Moscow, 1986, p. 139.

Physically nonlinear problems

Analytical solution: Analytical solution: C.N.I.I. of N.I.I.J.B Gosstroy of the USSR. Design Guide for Concrete and Reinforced Concrete Structures of Heavy and Light Concrete without Reinforcement Prestressing (to SNiP 2.03-84), Moscow, 1986, p. 139.

Geometry:

b = 1 м;
h = 0.12 м;
h0 = 0.105 м

Material characteristics:
B25 grade heavy concrete: Е_b = 2.7 х 10⁴ МPа, R_bt,_ser = 1.6 МПа, ν = 0.2.
Stretch reinforcement of the class А-II: Е_S = 2.1 х 10⁵ МПа;
armature area: A_S = 393 мм².

Boundary conditions: Free support.

Loads: Uniformly distributed load q = 7 кН/м.

CALCULATION RESULTS:

Point	The desired value	Analytical solution	calculation results (LIRA)	Uncertainty,%
l/2	Deflection δ, мм	13,5	13,9493	3,33
	М, кНм	8,4	8,40875	0,1
	Limit torque М, тм	1,145	1,15756	1,1

Preview image: Array

Note: For the construction of the scheme was used FE 210 (physically non-linear rod FE). Number of nodes:63. Number of elements:62.

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