Effect of Hysteresis Type on Drift Capacity for Global Collapse of Moment Frame Structures for Seismic Loads

It is conjectured that different hysteresis behavior in moment frames subjected to seismic loads may lead to different levels of response because of degradation in strength and stiffness. To examine the existence and magnitude of this effect, this research aims to: (1) Determine the global collapse capacities of several classes of moment frame buildings under seismic loads. (2) Develop the basis for the seismic criteria for design and evaluation of moment frame buildings that reflect and account for the global drift capacity. (3) Evaluate the hysteresis effects on the demand level response and capacity/demand ratio of moment frame buildings under seismic loads. (4) Develop a nonlinear cyclic pushover procedure that can be used for estimating the global drift capacity of a specific building. To achieve these objectives, seismic analyses of 3-, 9- and 20-story moment resisting frame buildings were conducted to evaluate the effects of the hysteretic behavior of beam-to-column connections, structural stiffness, and structural strength on the collapse potential and the demand level response. Five hysteresis models: basic bilinear, strength degradation, stiffness degradation, stiffness degradation + strength degradation, and pinching are evaluated. The effects of hysteresis behaviors are very significant for both global drift capacities and demand level responses. Two interesting results for the mid-rise/high-rise buildings are that (1) strength degradation significantly decreases both the global drift capacity and the Sa capacity, whereas, (2) the existence of stiffness degradation increases the global drift capacity and the Sa capacity.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Huang, Zhenhua

Contributors dc:contributor

• Foutch, Douglas A.

• Engineering, Civil

Language dc:language

eng

Identifier

(MiAaPQ)AAI3250261

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83313