Nasser Marafi | STRUCTURAL OPTION | ST. JOSEPH HOSPITAL OF ORANGE | ORANGE, CA

USER NOTE>
While great efforts have been taken to provide accurate and complete information on the pages of CPEP, please be aware that the information contained herewith is considered a work-in-progress for this thesis project. Modifications and changes related to the original building designs and construction methodologies for this senior thesis project are solely the interpretation of Nasser Marafi. Changes and discrepancies in no way imply that the original design contained errors or was flawed. Differing assumptions, code references, requirements, and methodologies have been incorporated into this thesis project; therefore, investigation results may vary from the original design.

TECHNICAL ASSIGNMENTS

Technical Assignment 1 - Structural Concepts/ Structural Existing Conditions Report

Executive Summary

This is an existing condition report of the structural system in St. Joseph Hospital of Orange Patient Care Center & Facility Service Building. The report first describes the structural systems used throughout the building. The report then talks about the occupant use throughout the building and design assumptions made. Further on the report goes and lists the codes that were used and material strength requirements. A series of load computations are then made for dead, live, wind and seismic. Snow load computations were not done due its insignificance at the building’s location.

Spot checks for the gravity beams and girders are sized accordingly with the dead and live load computations. Seismic forces were found to control against wind forces; an ETABS lateral system model was made to check the lateral system against computed seismic forces. The Lateral system is sized accordingly and any discrepancies are justified.

Refer to the appendix for backup calculation and assumptions made. Additional backup calculations are available upon request.

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Technical Assignment 2 - Pro‐Con Structural Study of Alternate Floor Systems

Executive Summary

This report is in an investigation to alternate floor framing systems for Saint Joseph Hospital of Orange Patient Care Center & Facility Service Building. Preliminary designs were performed upon investigation of the different floor systems. Floor systems analyzed are as follows:

Composite Concrete on Steel Beams (Existing System)
Two Way Post Tensioned Slab
Precast Prestressed Hollow Core Slab.
Two Way Concrete Waffle Flat Slab System
Two Way Concrete Slab with Beams

Comparisons were made upon analysis, factors taken under considerations include; fire rating, cost and rate of construction, floor membrane thickness, building’s self weight and effect on architectural and mechanical plans.
The original design of a composite concrete on steel beams floor system seems to be the best solution. Advantages like a lighter overall system with the ability to accommodate future equipment layout alterations with ease, make this system rather unique and best for a hospital building use.

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Technical Assignment 3 - Lateral System Analysis and Confirmation Design

Executive Summary

The following report analyzes the main lateral force resisting system and determines the controlling lateral forces which are seismic in this case. The analysis was done in ETABS and was also checked using hand calculations to ensure accuracy of the computer model. When checking the serviceability and strength capacity of the structural members, we find that all criteria are met according to ASCE 7-05 code. This report also concludes that the structure is more rigid than expected by ASCE 7-05 and is justified accordingly. Please refer to appendix for calculations, and any additional computer output and hand calculations are available upon request.

Click here to download in PDF format.