CKI-10: Design Guidelines for Ductility and Drift Limits
This report summarizes each of the studies that have been conducted in California as a part of the CUREe-Kajima Research Project #5, entitled "Design Guidelines for Ductility and Drift Limits." This research project has been supported by a grant provided by the Kajima Corporation and administered by CUREe (California Universities for Research in Earthquake Engineering). This financial support is gratefully acknowledged.
This report includes:
Evaluation of Seismic Performance of a Ten-Story RC Building
Vitelmo V. Bertero
The studies reported herein are a part of a research project on "Design Guidelines for Ductility and Drift Limits,"and have been conducted with the ultimate objective of developing reliable methods for the design of new buildings, and also to aid in the vulnerability assessment of existing buildings and in the selection of efficient seismic upgrading strategies and techniques for existing hazardous buildings. To achieve this ultimate goal it was considered necessary to carry out case studies on real buildings. Two seismically instrumented buildings which have survived recent moderate earthquake motions were selected for the studies. The first building was a RC thirty-story building. The results of the studies conducted on that building have been reported in a report entitled "Evaluation of the Seismic Performance of a Thirty-Story RC Building." The second building is a ten-story RC building. The studies conducted on this second building have the following objectives.
Although the main objective is to determine how reliable are present methods of estimating the performance of existing buildings, the studies conducted herein also have the following objectives:
(1) To evaluate the reliability of present system identification techniques of inferring from the recorded responses of a building the dynamic characteristics of the building.
(2) To assess the reliability of analytical models and methods that are presently available for conducting analyses of the seismic performance of buildings.
(3) To evaluate through overstrength and dynamic (time-history) analyses the strength and deformation capacity of the building as well as its response, and particularly the damage that the building can suffer when subjected to what can be considered to be future critical ground motions.
- Introductory Remarks
2. DESCRIPTION OF THE BUILDING, ITS INSTRUMENTATION AND DESIGN CRITERIA
- General Description of the Building System
- Seismic Design Criteria
3. RECORDED RESPONSE DURING THE WHITTIER NARROWS EARTHQUAKE
- The Whittier Narrows Earthquake
- Description of the Recorded Response During The Whittier Earthquake
- System Identification of the Dynamic Characteristics of the Building
4. EVALUATION OF THE PERFORMANCE OF-THE BUILDING FOR MODERATE EARTHQUAKE GROUND MOTIONS
- Introductory Remarks
- Eigenvalue Analysis
- Time-History Analyses
5. EVALUATION OF THE SUPPLIED CAPACITIES TO THE BUILDING
- General Remarks
- Nonlinear Static-To-Collapse Analysis in the Longitudinal (N-S) Direction of the Building
- Nonlinear Static-To-Collapse Analysis in the Transverse (E-W) Direction
6. NONLINEAR ANALYSES OF THE PERFORMANCE OF THE BUILDING UNDER SAFETY LEVEL EARTHQUAKE GROUND MOTIONS
- Selection of the Critical Ground Motions
- Behavior Under The Hollister Record
- Behavior Under The James Road Record
- Comparison of the Bahavior of the Building Under The Hollister and James Road Records
- Simplified Nonlinear Analyses
7. SUMMARY, CONCLUSIONS AND RECOMMENDATIONS
- Summary and Conclusions
- Recommendations For Future Research and Development
Also listed as Report No.: CK92-03C (February 1992)