A displacement-based strength reduction factor for high-rise steel moment-resisting frames

2006 ◽  
Vol 15 (3) ◽  
pp. 233-247
Author(s):  
W. H. Lee ◽  
C. C. Yu ◽  
S. H. Tung
Keyword(s):  
Reduction Factor ◽  
Strength Reduction ◽  
Strength Reduction Factor ◽  
Steel Moment Resisting Frames ◽  
High Rise ◽  
Moment Resisting Frames ◽  
Moment Resisting ◽  
Displacement Based

An improvement of direct displacement-based design approach for steel moment-resisting frames controlled by fluid viscous dampers

2021 ◽  
pp. 136943322199249
Author(s):  
Mahsa Noruzvand ◽  
Mohtasham Mohebbi ◽  
Kazem Shakeri
Keyword(s):  
Performance Level ◽  
Design Approach ◽  
Excellent Performance ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Earthquake Records ◽  
Direct Displacement Based Design ◽  
Moment Resisting ◽  
Displacement Based ◽  
Spectral Velocity

Direct displacement-based design (DDBD) method is one of the most effective methods for performance-base design of structures that has been also employed to design structures controlled by fluid viscous damper (FVD). In previous studies, a modified DDBD has been developed to apply the higher mode effects as well as difference between spectral velocity and pseudo-spectral velocity on the design velocity of FVD. To this end, two constants were defined to correct the damping coefficient of FVD that these correction constants had been determined in a non-classical and iterative manner. In this study, a new classical method is proposed for determining these constant such that no iteration is required in DDBD. In order to be able to introduce this design approach as a reliable framework, its performance is validated under different sets of earthquake records and this design approach is also developed for structures controlled by nonlinear FVD. Steel moment-resisting frames with different numbers of stories have been designed using this method. For comparison, structures have been also designed based on DDBD proposed in previous researches. The results show that DDBD approach improved in this study is capable to achieve the design performance level under different sets of earthquake records and this design approach has more effective performance than previous design methods. Performance of steel moment-resisting frames equipped with nonlinear FVD also shows excellent performance of this design approach in achievement of desirable performance level. Therefore, DDBD approach proposed in this study can be introduced as a new classical and reliable framework because of its simplicity and excellent performance under different sets of earthquakes.

Direct Displacement-Based Design of a Novel Hybrid Structure: Steel Moment-Resisting Frames with Cross-Laminated Timber Infill Walls

2016 ◽  
Vol 32 (3) ◽  
pp. 1565-1585 ◽  
Author(s):  
Matiyas A. Bezabeh ◽  
Solomon Tesfamariam ◽  
Siegfried F. Stiemer ◽  
Marjan Popovski ◽  
Erol Karacabeyli
Keyword(s):  
Design Method ◽  
Hybrid Structure ◽  
Nonlinear Time History Analysis ◽  
Earthquake Ground Motion ◽  
Cross Laminated Timber ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Direct Displacement Based Design ◽  
Moment Resisting ◽  
Displacement Based

This study proposes an iterative direct displacement based design method for a novel steel-timber hybrid structure. The hybrid structure incorporates cross-laminated timber (CLT) shear panels as an infill in steel moment-resisting frames. The proposed design method is applied to design three-, six-, and nine-story hybrid buildings, each with three bays and a CLT-infilled middle bay. Nonlinear time history analysis, using 20 earthquake ground motion records, is carried out to validate the performance of the design method. The results indicate that the proposed method effectively controls the displacements due to seismic excitation of the hybrid structure.

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