Preliminary Design of a 20-story Reinforced Concrete Building

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Preliminary Design of a 20-story Reinforced Concrete Building

Author: Mike Mota, P.E. | Size: 1.47 MB | Format: PDF

Preliminary Design of a 20-story Reinforced Concrete Building
By
Mike Mota, P.E.
Chair  Task B-C
Preliminary Design and Economical Impact
Member of ACI and Secretary of Committee 314
Atlantic Regional Manager
CRSI
Jim Lai, S.E.
(Retired)
March 19, 2008

TABLE OF CONTENTS
1. Building description……………………………………………………………….. ………..3
1.1 Material……………………………………………………………………………..3
1.2  Design loading………………………………………………………………………3
1.3 Story weight………………………………………………………………. ………..3
1.4 Governing codes…………………………………………………………………….3
2. Outline of preliminary design procedure:……………………………………………………6
2.1  Loading:……………………………………………………………………………..6
2.1.1 Develop seismic loading based on ASCE7-05 Chapter 11 and 12……………6
2.1.2 Design of structural wall (shear wall)…………………………………………6
2.1.3 Design of special moment frame………………………………………………6
3.  Lateral Force Analysis:………………………………………………………………………7
3.1  Mapped Spectral Acceleration………………………………………………………7
3.2  Structural System……………………………………………………………………7 
4.  Equivalent Lateral Force Procedure:…………………………………………………………8 
4.1  Unit Loads …………………………………………………………………………..9
4.2  Seismic Story Shear and Building OTM…………………………………………….9
4.3  Preliminary design of structural wall……………………………………………….10 
5.  Moment Frame Design:……………………………………………………………………..21
5.1  Two moment frames in each direction……………………………………………..22
5.2  Seismic Force distribution using Portal Method…………………………………...25
5.3 Based on two cycle moment distribution…………………………………………..25
5.4  Column axial load  (Between 3rd and 4th Floor)…………………………………..25
6. Preliminary Material Quantities for Superstructure only…………………………………....31
6.1 Shear-walls………………………………………………………………………….31
6.2 Columns…………………………………………………………………………….32
6.3 Slabs………………………………………………………………………………...32
7. Appendix A: Power-poi

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