scholarly journals A Nonlinear Static Procedure for the Seismic Design of Symmetrical Irregular Bridges

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Shanshan Li ◽  
Ping Xiang ◽  
Biao Wei ◽  
Lu Yan ◽  
Ye Xia
Keyword(s):  
Seismic Design ◽  
Design Theory ◽  
Design Procedure ◽  
Nonlinear Static Analysis ◽  
Capacity Spectrum ◽  
Nonlinear Static Procedure ◽  
Nonlinear Static ◽  
Displacement Demand ◽  
Displacement Based ◽  
Displacement Based Seismic Design

Displacement-based seismic design methods support the performance-based seismic design philosophy known to be the most advanced seismic design theory. This paper explores one common type of irregular-continuous bridges and studies the prediction of their elastoplastic displacement demand, based on a new nonlinear static procedure. This benefits to achieve the operation of displacement-based seismic design. Three irregular-continuous bridges are analyzed to advance the equivalent SDOF system, build the capacity spectrum and the inelastic spectrum, and generate the new nonlinear static analysis. The proposed approach is used to simplify the prediction of elastoplastic displacement demand and is validated by parametric analysis. The new nonlinear static procedure is also used to achieve the displacement-based seismic design procedure. It is tested by an example to obtain results which show that after several combinations of the capacity spectrum (obtained by a pushover analysis) and the inelastic demand spectrum, the simplified displacement-based seismic design of the common irregular-continuous bridges can be achieved. By this design, the seismic damage on structures is effectively controlled.

Displacement-Based Seismic Design for Reinforced Masonry Shear-Wall Structures, Part 1: Background and Trial Application

2015 ◽  
Vol 31 (2) ◽  
pp. 969-998 ◽  
Author(s):  
Farhad Ahmadi ◽  
Marios Mavros ◽  
Richard E. Klingner ◽  
Benson Shing ◽  
David McLean
Keyword(s):  
Seismic Design ◽  
Design Procedure ◽  
Shear Wall ◽  
Local Deformation ◽  
Wall Structures ◽  
Reinforced Masonry ◽  
Plastic Mechanism ◽  
Displacement Based ◽  
Masonry Shear Wall ◽  
Displacement Based Seismic Design

In this paper, a displacement-based seismic design procedure is presented for reinforced masonry shear-wall structures, with the objective of being more consistent, transparent, and practical than current force-based seismic design procedures. The procedure anticipates the formation of a plastic mechanism at specified target displacements, calculates the local deformation demands associated with that mechanism, and ensures that those local deformation demands remain below deformation capacities for flexure-dominated and shear-dominated wall segments. Guidelines to determine the target displacements and effective damping properties for reinforced masonry wall structures are provided. The proposed procedure and guidelines are used in a trial application to design a full-scale, two-story reinforced masonry shear-wall system.

Direct Displacement Based Seismic Design of High Rise Structures with Strengthened Stories (I) - Theory

2011 ◽  
Vol 250-253 ◽  
pp. 2176-2185
Author(s):  
Ke Jia Yang ◽  
Xing Wen Liang ◽  
Lin Zhu Sun
Keyword(s):  
Seismic Response ◽  
Seismic Design ◽  
Design Procedure ◽  
Single Degree Of Freedom ◽  
Mode Theory ◽  
High Rise ◽  
Single Degree ◽  
Actual Design ◽  
Displacement Based ◽  
Displacement Based Seismic Design

High rise structures with strengthened stories are widely used nowadays. A rational seismic design procedure for this kind of structure is thus necessary. Based on mode theory and direct displacement based seismic design of multi-story buildings, this paper proposed a new direct displacement based seismic design procedure. In the proposed method, each mode of the high rise structure is equivalent to a single degree of freedom (SDOF) system. Seismic response of each mode is calculated and adds up to consider the contributions of higher modes. Considering the characteristic of strengthened stories, two stories above the strengthened stories are taken as the “key stories”, whose performance indicates the performance of the building. The proposed procedure is logical, simple and can serve for reference of actual design.

Experimental Study on Direct Displacement-Based Seismic Design of RC Columns

2005 ◽  
Vol 21 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Y.-Y. Lin ◽  
K.-C. Chang ◽  
Y.-L. Wang
Keyword(s):  
Seismic Design ◽  
Design Method ◽  
Experimental Studies ◽  
Design Procedure ◽  
Maximum Displacement ◽  
Rc Columns ◽  
Seismic Engineering ◽  
Displacement Based ◽  
Seismic Design Method ◽  
Displacement Based Seismic Design

AbstractFor performance-based seismic engineering of buildings, the direct displacement-based seismic design method is different from the coefficient method used in FEMA-273 and the capacity spectrum method adopted in ATC-40. The method not only is a linear static procedure but also is applied to the design of new constructions. This paper concerns with experimental studies on the accuracy of the direct displacement-based design procedure. Experimental results of three reinforced concrete (RC) columns designed by the displacement procedure are presented and discussed through pseudo-dynamic tests and cyclic loading tests. From the tests, it is shown that the stiffness degrading factor of RC columns plays a key role. The direct displacement-based seismic design method can reliably capture the maximum displacement demand of the test RC columns if the stiffness degrading factor adopted in the displacement design method for RC material is adequate.

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