Keywords

Non-contact lap splice, UHPC, Seismic Design

Abstract

Controlling the location and strength of plastic hinges is crucial for maintaining the integrity of seismic-resistant structures during seismic events. Although advanced materials, new structural systems, and supplemental damping devices have been extensively researched, conventional reinforced concrete detailing can also effectively achieve this control. This study explores a controllable slippage mechanism in lap-splice configurations of monolithic ultra-high performance concrete (UHPC) members to regulate the location and capacity of plastic hinges in concrete building frames. UHPC's superior tensile, compressive, and bond strengths, compared to normal strength concrete (NSC), enable the use of strategically placed lap splices with short lap lengths. This arrangement allows the reinforcing bars to slip in a controlled manner, which may challenge existing NSC detailing standards. The controlled slippage within the non-contact lap splices, determined by the lap length, is designed to set hinge capacity and dissipate energy through both the friction between the reinforcement and concrete and the yielding of continuous mild steel. The experimental program demonstrates the behavior of these novel hinges in large-scale monolithic building girders and beam-column connections under reversed cyclic loads. Additionally, component-level pull-out and flexural tests involving non-contact lap splices were conducted to support the design of large-scale specimens and to calibrate analytical models of the bond-slip behavior.

Completion Date

2024

Semester

Fall

Committee Chair

Apostolakis, Georgios

Degree

Doctor of Philosophy (Ph.D.)

College

College of Engineering and Computer Science

Department

Department of Civil, Environmental and Construction Engineering

Degree Program

Civil Engineering

Format

PDF

Identifier

DP0029051

Language

English

Release Date

12-15-2024

Access Status

Dissertation

Campus Location

Orlando (Main) Campus

Accessibility Status

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