Improved Seismic Response of Tilt-Up Buildings


Abstract eng:
Tilt-up construction is a cost-effective technique for constructing low-rise and mid-rise buildings due to its lower construction costs and a shorter construction period. Though it is popular in the United States, these types of structures are extremely vulnerable to moderate and severe earthquakes. Significant structural and nonstructural damage of tilt-up buildings has been reported since the 1964 Alaska earthquake. In order to estimate the potential vulnerability of different types of tilt-up constructions, a critical comparison is made of the response characteristics of three types of one story tilt-up buildings. These include an existing instrumented tilt-up building with continuous concrete walls and timber roof that is representative of the construction prior to the 1980’s Additional buildings include a tilt-up building designed with segmented walls and timber roof and a designed tilt-up building with segmented walls and steel roof. These two buildings are more representative of current construction practice. The three models are subjected to individual, moderate and severe earthquakes. These three dimensional FEM models represent the three different types of tilt-up buildings considered in this study. Nonlinearities of different structural components used in the tilt-up buildings are incorporated in the models. The overall performance will be presented in terms of modal periods, base shears, story drifts, displacement time histories and the distributions of forces on critical structural components. Since the capacity and ductility of the connections significantly influence the overall performance of the whole structure, the strength and ductility of these individual components will be noted in detail. Based on these results, recommendations are made for evaluating and improving the seismic performance of these types of structures located in seismically active areas.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 459.:
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