EARTHQUAKE SIMULATION TESTS AND ASSOCIATED STUDIES OF A 0.3-SCALE MODEL OF A SIX-STORY CONCENTRIC BRACED STEEL STRUCTURE.

摘要

This report summarizes the research conducted as part of the Six-Story Concentric K-braced Steel Building Structure Phase of the U.S.-Japan Cooperative Earthquake Research Program. The U.C. Berkeley part of the research program had the following main objectives: (i) to review the design of the full scale test building and to analytically predict its behavior; (ii) to design, fabricate and instrument the largest scale model that could be tested on the U.C. Berkeley earthquake simulator facility; (iii) to conduct earthquake simulator testing of the reduced scale model; (iv) to evaluate the test results and their implications regarding the seismic resistant design and construction of concentric K-braced steel structures; (v) to evaluate the reliability of computer programs to predict the seismic response of steel structures; and (vi) to formulate recommendations for improving the design and construction of the braced steel frames.; The soundness of the full scale test building design and its predicted dynamic behavior are discussed in Chapters 2 and 3. The selection of the scale factor, the design, construction and instrumentation of the reduced scale model are described in Chapter 4. In Chapter 5, the results of the tests conducted to determine the initial mechanical characteristics of the reduced scale model are presented and compared with the analytically predicted results.; Chapter 6 discusses the experimental program, the earthquake simulator tests, the data acquisition and its processing. The results obtained in four selected tests are described in Chapter 7. Further evaluation of the test results and their implications regarding the states of the practice and art of seismic resistant design are discussed in Chapter 8. The correlation of the reduced scale model test results with the analytically predicted responses and the full scale test results are discussed in Chapter 9.; In Chapter 10, the primary results are summarized and pertinent conclusions drawn. Recommendations for improving the state of the art and current practice of the seismic resistant design of concentric K-braced structures are formulated; future research needs are outlined. (Abstract shortened with permission of author.)