Seismic performance of high‐rise special truss moment frames with multiple Vierendeel ductile segments and high panel aspect ratios

2020 ◽  
Vol 29 (18) ◽  
Author(s):  
Rajesh Kumar ◽  
Dipti Ranjan Sahoo
Keyword(s):  
Seismic Performance ◽  
Moment Frames ◽  
High Rise ◽  
Aspect Ratios ◽  
Special Truss Moment Frames

scholarly journals Seismic Performance and Evaluation of Controlled Spine Frames Applied in High-rise Buildings

2018 ◽  
Vol 34 (3) ◽  
pp. 1431-1458 ◽  
Author(s):  
Xingchen Chen ◽  
Toru Takeuchi ◽  
Ryota Matsui
Keyword(s):  
Seismic Performance ◽  
Time History ◽  
Evaluation Procedure ◽  
Equivalent Linearization ◽  
Stiffness Ratio ◽  
Moment Frames ◽  
Moment Frame ◽  
High Rise ◽  
Frame System ◽  
Frame Stiffness

A controlled spine frame system consists of moment frames and spine frames with concentrated energy-dissipating members. This system guarantees the continuous usability of buildings against Japanese Level-2 earthquake events (similar to DBE events in California), and the authors have confirmed its excellent performance in preventing damage concentration in low-rise buildings. This study further investigates the effect of diverse structural properties on the seismic performance of controlled spine frames applied in high-rise buildings. The effect of building height, yield drift of dampers, spine-to-moment frame stiffness ratio, and damper-to-moment frame stiffness ratio are illustrated in detail, and optimal values are discussed. Also, a segmented spine frame system is proposed for high-rise buildings. The simple evaluation procedure proposed by the authors for low-rise buildings, based on equivalent linearization techniques and response spectrum analyses, was modified to include higher-mode effects for high-rise buildings based on modal analysis. The modified evaluation method was verified by modal pushover and time-history analyses.

scholarly journals Analytical investigation of the seismic performance of special truss girder framing systems with new technologies

2020 ◽  
Author(s):  
Μαρία Ντίνα
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Seismic Performance ◽  
New Technologies ◽  
Analytical Investigation ◽  
Moment Frames ◽  
Special Truss Moment Frames

Αντικείμενο της Διατριβής αποτελεί η αναλυτική διερεύνηση της δυνατότητας βελτίωσης της αντισεισμικής συμπεριφοράς ειδικών δικτυωτών πλαισιακών συστημάτων (Special Truss Moment Frames, STMFs, από χάλυβα) μέσω της ενσωμάτωσης ράβδων κυκλικής διατομής από κράματα νικελίου-τιτανίου (μνήμης μορφής – shape memory alloy bars), οι οποίες αποτελούν εναλλακτικό σύστημα απορρόφησης της σεισμικής ενέργειας στο ειδικό τμήμα (special segment) των πλαισίων. Τούτο καθόσον διαθέτουν την δυνατότητα να ανακτήσουν την αρχική τους (απαραμόρφωτη) γεωμετρία μετά από μηχανική διαταραχή κατά την αποφόρτιση, μέσω του μετασχηματισμού φάσης των κρυσταλλικών δομών (ματερνσιτικής – ωστενιτικής). Ο επικρατών αντισεισμικός σχεδιασμός των STMFs με ειδικό μέρος ευρισκόμενο στο μέσο του ανοίγματος τους (με σκοπό την απορρόφηση σεισμικής ενέργειας) είναι η δημιουργία πλαστικών αρθρώσεων στις τέσσερεις γωνίες. Αυτός ο μηχανισμός προτείνεται να αντικατασταθεί μέσω της παραμόρφωσης των SMAs σε ένα ειδικό μέρος με αρθρώσεις στις κορυφές του. Τονίζεται ότι οι ράβδοι SMA θεωρούνται σε όλες τις αναλύσεις της Διατριβής ως μη λυγηρές, είτε λόγω μεγάλης διατομής είτε λόγω ενίσχυσης μέσω συστημάτων αποφυγής λυγισμού.

Seismic performance of a proposed wood-concrete hybrid system for high-rise buildings

2021 ◽  
Vol 238 ◽  
pp. 112194
Author(s):  
Yuxin Pan ◽  
Thomas Tannert ◽  
Kuldeep Kaushik ◽  
Haibei Xiong ◽  
Carlos E. Ventura
Keyword(s):  
Seismic Performance ◽  
Hybrid System ◽  
High Rise

Analysis on Seismic Performance of Beam and Plate Converter Floor

2014 ◽  
Vol 580-583 ◽  
pp. 1551-1554
Author(s):  
Gen Tian Zhao ◽  
Xu Ting Kou
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Structure Calculation ◽  
High Rise ◽  
High Rise Building ◽  
Design Requirements

With the project case, the seismic performance of girder transfer floor member and the plate transfer floor member were discussed. Contrast calculation was carried out in girder transfer floor member and the plate transfer floor member with SATWE method to analyze its reasonable and unreasonable places. Based on overall structure calculation of a high rise building, the seismic design requirements for buildings applying thick transferring plate have been presented. The conclusion is that the seismic performance of girder transfer floor member is more advantageous and affordable, more convenient and more economical in ingredients.

Automation of seismic design of high-rise structure with braced steel frame

2021 ◽  
Author(s):  
Xin Zhao ◽  
Gang Wang ◽  
Jinlun Cai ◽  
Junchen Guo
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Structural Design ◽  
Structure Design ◽  
Steel Frame ◽  
Design Methods ◽  
Automatic Design ◽  
Component Level ◽  
Design Algorithm ◽  
High Rise

<p>With the continuous development and progress of society, the structure of high-rise buildings has been paid more and more attention by the engineering community. However, the existing high- rise structure design methods often have a lot of redundancy and have a lot of room for optimization. Most of the existing seismic design methods of high-rise structures are based on engineering experience and manual iterative methods, so that the efficiency of design can not meet the needs of the society. if the method of design automation is adopted, the workload of designers can be greatly reduced and the efficiency of structural design can be improved. Based on the digital modeling theory, this paper proposes a MAD automatic design algorithm, in which the designer provides the initial design of the structure, and the algorithm carries out the modeling, analysis, optimization and design of each stage of the structure, and finally obtains the optimal structure. The structural design module of this algorithm starts from the component level, when the component constraint design meets the limit requirements of the specification, it enters and completes the component constraint design and the global constraint design of the structure in turn. In this paper, taking a ten-story braced steel frame high-rise structure as an example, the optimal design is carried out, and its seismic performance is analyzed. the results show that the MAD automatic design algorithm can distribute the materials to each part reasonably, which can significantly improve the seismic performance of the structure and realize the effective seismic design.</p>

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