Analysis of simple beam by using Autodesk Robot Structural Analysis Professional 2017

Transcription

1 Islamic University of Gaza College of Engineering Civil Engineering Department Analysis of simple beam by using Autodesk Robot Structural Analysis Professional 2017 Submitted by: Name:.. ID: Supervisors: Dr. Eng. Mohammed H. Arafa Eng. Mohammed R. Kuheil Gaza, Palestine 2017

2 Table of Contents 1. Plain view (Architectural drawings) Beam distribution (Structural drawings) Load Calculations Live load Dead load Own weight Covering Materials Equivalent partition load Beam analysis Column Analysis Area method: Conclusions:... 8

3 1. Plain view (Architectural drawings) Plain (Architectural drawings) Dr. Mohammed H. Arafa Page (1) Eng. Mohammed R. Kuheil

4 2. Beam distribution (Structural drawings) Beam Distribution (Structural drawings) Dr. Mohammed H. Arafa Page (2) Eng. Mohammed R. Kuheil

5 3. Load Calculations 3.1. Live load To find the live load applied on a building must be refer to the general codes (IBC, UBC and ASCE 7-10 or ASCE 7-16). The value of live load varies according to the usage of the building, According ASCE 7-16, Ch. (4): For regular residential building = 1.92 KN/m t/m Dead load Dead load in buildings is include own weight, covering materials, and equivalent partition load and external walls Own weight The total volume of sample = ( ) = m 3 The volume of block = = 0.02 m 3 The volume of reinforced concrete = ( ) = m 3 The weight of reinforced concrete = = ton The weight of block = 0.02 ton The total weight of sample = = ton The total weight of the sample (per unit area) = The total weight of the sample (per unit area) = W C + W B Area of the representative sample = 0.47 t/m Dr. Mohammed H. Arafa Page (3) Eng. Mohammed R. Kuheil

6 Covering Materials Assumptions for covering materials Material Thickness (cm) Unit Weight (t/m 3 ) Sand Mortar Tile Plaster The total weight of covering material = (Thickness (h) unit weight) Covering Materials The total weight of covering materials = Plaster + Sand + Morter + Tile The total weight of covering materials = (Thickness (h) unit weight) The total weight of covering materials = ( ) The total weight of covering materials = t/m 2 Dr. Mohammed H. Arafa Page (4) Eng. Mohammed R. Kuheil

7 Equivalent partition load Assumptions for partitions: The total length is equal 70 m, the total height is equal 3 m, the thickness is equal 10 cm and the thickness for plaster for one face is equal 2 cm. The total weight of partition per m 2 = ( ) + ( ) = t/m 2 the total weight of partition (ton) = = ton EPL (t/m 2 ) = = t/m The total service dead load = own weight + covering materials + EPL The total service dead load = = t/m 2. From the ASCE 7-16 Chapter 4 L.L. for regural residential building = 0.20 t/m 2 Factored load = max(1.4 DL, 1.2 DL LL) U (t/m 2 ) = max(1.4 1, ) U (t/m 2 ) = max(1.40, 1.52) U (t/m 2 ) = 1.52 t/m 2. Dr. Mohammed H. Arafa Page (5) Eng. Mohammed R. Kuheil

8 4. Beam analysis From the structural drawings Strip width = = m (as an average for simplify). 2 Total service load acting on the beam (7) DL = DL from the slab + own weight of beam DL = = 4.7 t/m LL = live load from the slab Strip width LL = = 0.8 t/m Factored load = max. (1.4 DL, 1.2 DL LL) W u (t/m) = max. ( , ) W u (t/m) = 6.92 t/m From the structural drawings: The spans are equal 5.37, 5.75 and 5.37 m. Dr. Mohammed H. Arafa Page (6) Eng. Mohammed R. Kuheil

9 The analysis of beam using Autodesk ROPOR structural analysis software Factored load description S.F.D B.M.D Reactions Dr. Mohammed H. Arafa Page (7) Eng. Mohammed R. Kuheil

10 5. Column Analysis 5.1. Area method: In this method, to find the load acting on a column should be multiply the tributary area in a dead load and live load. From the structural drawings, for the columns 9 (C9): Tributary area (A 9 ) = m 2 DL = = ton. LL = = ton. Factored load = max. (1.4 DL, 1.2 DL LL) P u (ton) = max. ( , ) P u (ton) = ton. The factored load acting on a column 9 (C9): Area method = ton. Reaction method = ton Conclusions: 1. The reaction method is very accurate in comparison with the area method because the reaction method is depend on the actual exact analysis but the area method is approximate and inaccurate method. Dr. Mohammed H. Arafa Page (8) Eng. Mohammed R. Kuheil