Seismic performance of frame structures coupled with an external rocking wall

2020 ◽  
Vol 224 ◽  
pp. 111207
Author(s):  
Angelo Di Egidio ◽  
Stefano Pagliaro ◽  
Cristiano Fabrizio ◽  
Andrea M. de Leo
Keyword(s):  
Seismic Performance ◽  
Frame Structures ◽  
Rocking Wall

scholarly journals Corrigendum to “Improving seismic performance of portal frame structures with steel curved damper” [Structures 24 (2020) 27–40]

Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 1907
Author(s):  
Aria Ghabussi ◽  
Jafar Asgari Marnani ◽  
Mohammad Sadegh Rohanimanesh
Keyword(s):  
Seismic Performance ◽  
Frame Structures ◽  
Portal Frame

scholarly journals Cyclic Tests and Numerical Analyses on Bolt-Connected Precast Reinforced Concrete Deep Beams

2021 ◽  
Vol 11 (12) ◽  
pp. 5356
Author(s):  
Jing Li ◽  
Lizhong Jiang ◽  
Hong Zheng ◽  
Liqiang Jiang ◽  
Lingyu Zhou
Keyword(s):  
Reinforced Concrete ◽  
Failure Mode ◽  
Seismic Performance ◽  
High Strength ◽  
Length Ratio ◽  
Frame Structures ◽  
Initial Stiffness ◽  
Frame Buildings ◽  
Parametric Analyses ◽  
Bending Failure

A bolt-connected precast reinforced concrete deep beam (RDB) is proposed as a lateral resisting component that can be used in frame structures to resist seismic loads. RDB can be installed in the steel frame by connecting to the frame beam with only high-strength bolts, which is different from the commonly used cast-in-place RC walls. Two 1/3 scaled specimens with different height-to-length ratios were tested to obtain their seismic performance. The finite element method is used to model the seismic behavior of the test specimens, and parametric analyses are conducted to study the effect on the height-to-length ratio, the strength of the concrete and the height-to-thickness ratio of RDBs. The experimental and numerical results show that the RDB with a low height-to-length ratio exhibited a shear–bending failure mode, while the RDB with a high height-to-length ratio failed with a shear-dominated failure mode. By comparing the RDB with a height-to-length ratio of 2.0, the ultimate capacity, initial stiffness and ductility of the RDB with a height-to-length ratio of 0.75 increased by 277%, 429% and 141%, respectively. It was found that the seismic performance of frame structures could be effectively adjusted by changing the height-to-length ratio and length-to-thickness of the RDB. The RDB is a desirable lateral-resisting component for existing and new frame buildings.

Comparative seismic performance assessment of RC and RC/ECC hybrid frame structures: a shake table study

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Fasih Ahmed Khan ◽  
Muhammad Rashid ◽  
Sajjad Wali Khan ◽  
Muhammad Rizwan ◽  
Yasir Irfan Badrashi ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Seismic Performance ◽  
Frame Structures ◽  
Shake Table ◽  
Seismic Performance Assessment

Seismic Performance Evaluation for Steel-Frame-Structure Considering Member Fracture

2017 ◽  
Author(s):  
Kensuke Shiomi
Keyword(s):  
Performance Evaluation ◽  
Dynamic Response ◽  
Dynamic Analysis ◽  
Seismic Performance ◽  
Ground Motions ◽  
Steel Frame ◽  
Frame Structures ◽  
Seismic Performance Evaluation ◽  
Steel Frame Structures

Through the 2011 Tohoku Earthquake or the 2016 Kumamoto Earthquake, much larger earthquakes are considered recently in the seismic designs of large steel-frame structures. When structures are exposed by these severe ground motions, partial destructions in the structures, such as damage or fracture of members could happen. Especially, the low cycle fatigue of steel structures because of the repeated load from these long-term ground motions is a serious problem. However, current seismic performance evaluation method based on nonlinear dynamic analysis considers only elastic and plastic deformation of each member, excluding the fracture of members. If this member fracture happens during earthquakes, there is considered to be many effects on the seismic performance, like the changes of the vibration property, the dynamic response and the energy absorbance capacity of structures. Therefore, the fracture of members is preferably taken into account in the seismic performance evaluation for these large earthquakes. This paper proposes the dynamic analysis method for steel-frame structures which can express the member fracture. Dynamic analyses considering and not considering member fracture under the repeated loads supposing the long-term earthquake are conducted to the FEM model of full-scale structure. By comparing each result, the effects of considering member fracture to the seismic performance such as the dynamic response and the energy absorbance capacity are discussed.

Effects of bond-slip and masonry infills interaction on seismic performance of older R/C frame structures

2018 ◽  
Vol 109 ◽  
pp. 251-265 ◽  
Author(s):  
Aslam Faqeer Mohammad ◽  
Marco Faggella ◽  
Rosario Gigliotti ◽  
Enrico Spacone
Keyword(s):  
Seismic Performance ◽  
Frame Structures ◽  
Bond Slip ◽  
Masonry Infills

Upgrading seismic performance of underground frame structures based on potential failure modes

2022 ◽  
Vol 153 ◽  
pp. 107116
Author(s):  
Chunyu Wu ◽  
Dechun Lu ◽  
M. Hesham El Naggar ◽  
Chao Ma ◽  
Qiang Li ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Failure Modes ◽  
Frame Structures ◽  
Potential Failure

scholarly journals Seismic Response Analysis and Control of Frame Structures with Soft First Storey under Near-Fault Ground Motions

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Chunyang Liu ◽  
Peng Sun ◽  
Ruofan Shi
Keyword(s):  
Seismic Response ◽  
Ground Motion ◽  
Seismic Performance ◽  
Frame Structures ◽  
Response Analysis ◽  
Main Structure ◽  
Response Characteristics ◽  
Near Fault ◽  
Buckling Restrained Brace ◽  
Near Fault Ground Motion

This paper proposes two kinds of arrangements of buckling-restrained brace dampers to strengthen soft-first-storey structures locally. Two types of near-fault ground motion, with and without pulse, were selected for a study of the seismic response characteristics of soft-first-storey structures with and without buckling-restrained brace dampers, and the effects of different bracing arrangements on improving the seismic performance of soft-first-storey structures were recognized. The results show that, compared with pulse-free ground motion, near-fault pulsed ground motion results in a more severe seismic response in soft-first-storey frame structures, leading to more serious and rapid destruction of the main structure. Buckling-restrained brace dampers have an obvious energy dissipation effect, play a better role in protecting the main structure, and have good practicality. Compared with structures in which the buckling-restrained brace dampers are arranged only on the bottommost layer, the bottom-four-layer-support structure is more advantageous in terms of seismic performance.

Analysis of the Seismic Performance of RC Frame Structures with Different Types of Bracings

2012 ◽  
Vol 166-169 ◽  
pp. 2209-2215
Author(s):  
Zhi Xin Wang ◽  
Hai Tao Fan ◽  
Huang Juan Zhao
Keyword(s):  
Seismic Performance ◽  
Time History ◽  
Steel Tube ◽  
Frame Structure ◽  
Frame Structures ◽  
Finite Element Models ◽  
Base Shear ◽  
Concrete Filled Steel Tube ◽  
Different Types ◽  
Rc Frame Structures

Finite element models of frames with steel-bracings and with concrete filled steel tube struts are built in ETABS. Seismic performance of these models is analyzed with base-shear method, superposition of modal responses method and time history method respectively. The results show that the steel-bracings or concrete filled steel tube struts are efficient to increase the story-stiffness, and the top displacement of the frame structure decreases significantly.

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