Learning Module: ASSESSMENT OFLearning Module: ASSESSMENT OF REINFORCED CONCRETE REINFORCED CONCRETE

COLUMN CAPACITYCOLUMN CAPACITY

Nestor Castaneda, ZachNestor Castaneda, Zach FeinsteinFeinstein

and Shirley J. Dyke and Shirley J. Dyke

Washington University in St. LouisWashington University in St. Louis

(NEESR-CABER Project)(NEESR-CABER Project)

Objective

The proposed educational module will focus on

understanding reinforced concrete column (RCC)

behavior under combined loading (Axial – Bending) and

different design assumptions.

The advantage of using this module is that the students will

be able supplement the materials from class with visual

evidence and comparisons between experimental and

numerically calculated results

DescriptionThe present module contains three main components:

Experimental data Video and photos from several experiments on scaled column specimens tested under bending and axial pseudo-static loads will be available through this interface. The experimental data will be generated using the portable Loading and Boundary Condition Box (LBCB) placed at UIUC

Description

Design spreadsheet The student will assess the axial and bending resisting capacities offered by the column

An additional document will be provided along with the proposed interface to provide students with a reference on concrete column design, types of failures and general instructions to use the excel spreadsheet.

Description Analysis The student will also be able to numerically calculate

the corresponding forces associated with an imposed

relative displacement between column ends. With this

tool the student can calculate the expected relative

displacement to produce forces which will exceed the

capacity of the section.

Learning steps…..– Compare the numerically calculated forces and the

experimental forces which produce an specific failure state.

– Determine what kind of failure occurred in the specimen (compression or tension failure), depending on the steel reinforcement ratio and the eccentricity of the applied loads.

– Propose sections with a design that ensures a ductile failure (yielding of the steel in the tension side) under a prescribed eccentricity of applied loads and steel reinforcement.

Module Interface

Future Plans

• Improvement of the design tool by adding shear capacity assessment

• A complete module, including lecture materials, homework assignments will be also developed.

• Experimental data obtained in partnership with MUST-SIM facility will be integrated into these module.

• Feedback will be required to improve the module before its release (we need users to implement this).