Performance-Based Earthquake Design and Detailing of Reinforced Concrete Bridge Piers
Date31st Oct 2023
Time02:00 PM
Venue Visveswaraya Seminar Hall (BSB368) - Second Floor
PAST EVENT
Details
In the last seven decades, the philosophy of earthquake-resistant design has broadened its scope and resulted in more reliable methods of design. The most recently matured and widely researched method is the Performance-based Earthquake Design (PBED). The fundamental design philosophy of PBED is to ensure multiple performance objectives based on the criticality of structures. The performance objectives are set in terms of performance levels (e.g., in terms of damage states) which are required to be achieved under specific levels of earthquake demand. In code-specific PBED, prescribed (multiple) performance levels are required to be achieved corresponding to specific levels of demand for different criticality of bridges. The basic requirements for performing nonlinear analysis to assess a bridge and elicit the performance are provided in these standards too. But the DESIGN at its core is still either force-based or displacement-based. The design procedure starts off with a single level of demand in terms of either force or displacement, and then using either force-based or displacement-based approach, the actual design is carried out. The performances (in terms of ductility demand or damage states) at other levels of demand are only checked through the results obtained from nonlinear analyses. And there are no guidelines provided in any design standard that would help a designer to modify the design so as to get closer to the desirable performance objectives. Thus, the proposed design method includes a design procedure along with design aids so as to guide the designers to achieve the expected performances with less, if not without iterations, under the PBED framework. Additionally, the study proposes improved detailing schemes to enhance the earthquake capacity.
Speakers
Mr. TRISHIT CHANDRA , CE21D015
Department of Civil Engineering