CE227_Assign1_06

CE227_Assign1_06 - University of California at Berkeley...

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University of California at Berkeley Civil and Environmental Engineering Instructor: Stephen A. Mahin Spring Semester 2006 CEE 227 -- Earthquake Resistant Design Introduction to Class Project Building Most of the homework assignments this semester will be related to the design of a hypothetical structure to be constructed in Berkeley. The building is to be built on a level rectangular site, located on firm soil approximately 2 km west of the Hayward Fault and 30 km east of the San Andreas Fault. The Hayward fault is assumed capable of generating an earthquake with a Richter magnitude of 7.2 and a magnitude 8+ earthquake is expected eventually on the San Andreas Fault. There are a number of smaller faults in the area. Thus, earthquake loads are a major design consideration in the overall design of this structure. Additional information on the seismic environment will be provided later. The owner of the building intends to use it as a nano-technology research facility. Specifically, the building will be used as an office building, housing a major research and development center for the company’s U.S. division. It will contain a variety of nanofabrication labs, high performance computer workstations for computer-assisted engineering as well as space for developing and prototyping advanced production systems. It will also house the corporate mainframe computer, which holds much of the companies proprietary software, intellectual property, and financial records. The company believes that a short shut down of the building of a few days or possibly weeks would be acceptable under a rare event, but that a major shut down of three or more months would make them consider moving their office to Austin, Texas. For truly rare events, they want to minimize but not necessarily avoid damage, but the costs of protecting their intellectual and capital investments in the building would have to be weighed against costs. Based on discussions with the owner, the design life of the structure may be assumed to be 50 years. During the course of the semester, you will carry out a preliminary design of the structure using relatively conventional and more advanced procedures, and evaluate your design using a variety of analytical techniques. Because of the technological orientation of the client, and their active risk management program, this project allows for a lot of latitude in design. The building was partially designed using the 1994 UBC, but a delay in financing and difficulty in getting a Berkeley building permit temporarily stopped the design process, so for permit purposes, it now will be redesigned using the 2003 CBC (equivalent to the 1997 UBC. FEMA 356 will be used to evaluate and improve the performance of the structure to satisfy the owner’s requirements. Some information is available about the 1994 design and this will be provided throughout the semester, as required. However, you will see that code provisions have changed quite dramatically in a decade, resulting in more than a doubling of the expected design forces. As such, some creativity is required in achieving an economical as well as safe structure.
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This note was uploaded on 08/09/2009 for the course CEE 227 taught by Professor Mahin during the Spring '06 term at Berkeley.

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CE227_Assign1_06 - University of California at Berkeley...

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