Structural Analysis and Design of Iben Sina Hospital in Jenin City Palestine

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Osama Rabaya
Samer Arabasi
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This project introduced the structural analysis and design of one of Iben-Sina hospital buildings in Jenin city in north of Palestine. Starting with studying the soil, all required soil parameters were extracted from the soil report including the bearing capacity which was 180 KN/m2 . Also, after studying the geometry and dimensions of the architectural drawings, initial dimensions of horizontal structural elements were calculated taking in consideration the predicted deflections, such that two way solid slabs of 18 cm thickness are used. Two beam sections of 30cm×60 cm and 40 cm×80cm were used. Initial dimensions of columns and walls were selected based on the probable axial loads applied. Gravity and seismic loads and load combinations were determined according to ASCE 7-10. A three-dimensional model was built in Etabs 16.2.1. Loads, load combinations, materials, members, and stiffness properties are all modeled in the program. Before using the model, it was verified for analysis using compatibility, equilibrium, and stress strain checks. The proposed initial dimensions were checked taking in consideration deflections and axial and shear capacities of structural members. The horizontal resistance of the building was studied, such that the seismic load resisting system was verified to be special bearing walls. On the other hand, response spectrum method was used for seismic analysis, such that the total base shear was predicted to be 6372 KN in X-direction and 7613 KN in Y-direction in an earthquake of 2% probability of exceedance in 50 years (based on IBC 2012). As well as P-Delta effects, vertical and horizontal irregularities were taken in consideration, such that the structure was found to have extreme torsional irregularity, reentrant corner irregularity, diaphragm discontinuity irregularity, mass irregularity, and vertical geometric irregularity. Before acceptance of design results from the program, they were undergoing to hand verification processes, such that one beam, one column, and one wall were designed manually, and they were compared to steel values and section capacities resulted by Etabs. All results were within acceptable range of error. By comparing the maximum total service load can be applied on the soil (198,750 KN) to the total resisting force can be generated by the soil (180,000 KN), a mat foundation of 1m thickness over 20 piles of 13 m length and 1m diameter were predicted to be sufficient to verify stability. Pile capacity was determined using Meyerhof method to be 1460 KN. The foundation and piles were modeled in SAFE 12, and the model was verified using compatibility, equilibrium, stress strain, soil stresses, and XII settlement checks. On the other hand, the foundation is designed for one-way shear, punching shear, and flexural forces. Last of all, proper, scaled, clear, and detailed structural drawings were prepared using AutoCAD. They included the required information about dimensions, reinforcement, development and splicing.