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Seismic retrofit of existing SRC frames using rocking walls and steel dampers

Akira WADA, Zhe QU, Shojiro MOTOYUI, Hiroyasu SAKATA

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 259-266 doi: 10.1007/s11709-011-0114-x

Abstract: A retrofit of an existing 11-story steel reinforced concrete frame that features the innovative use of post-tensioned rocking walls and shear steel dampers is presented. The main components of the retrofitting plan and important design considerations are described. The retrofitting system is expected to effectively control the deformation pattern of the existing structure and significantly reduce damage to the existing structure during major earthquakes.

Keywords： building structure     seismic retrofit     rocking wall     steel damper    

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Damage identification in connections of moment frames using time domain responses and an optimization

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 851-866 doi: 10.1007/s11709-021-0739-3

Abstract: In this study, an optimization-based method for joint damage identification of moment frames using the

Keywords： damage identification     beam-to-column connection     time-domain response     optimization    

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Performance evaluation of low-rise infilled reinforced concrete frames designed by considering local

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 686-703 doi: 10.1007/s11709-023-0937-2

Abstract: The interactions between reinforced concrete (RC) frames and infill walls play an important role in theseismic response of frames, particularly for low-rise frames.The approach was used to design example RC frames with infill walls in locations with different seismicityThe performance of these frames was assessed using nonlinear static, and dynamic analyses.The performance of the frames and the failure modes were compared with those of frames designed without

Keywords： reinforced concrete frames     infill wall     seismic design method     shear failure     wall-frame interaction    

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Multi-objective optimal design of braced frames using hybrid genetic and ant colony optimization

Mehdi BABAEI,Ebrahim SANAEI

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 472-480 doi: 10.1007/s11709-016-0368-4

Abstract: In this article, multi-objective optimization of braced frames is investigated using a novel hybrid algorithmas a novel hybrid method which does not appear in the literature for optimal design of steel braced frames

Keywords： multi-objective     hybrid algorithm     ant colony     genetic algorithm     displacement     weighted sum method     steel braced frames    

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Topology optimization and seismic collapse assessment of shape memory alloy (SMA)-braced frames: Effectiveness

Aydin HASSANZADEH; Saber MORADI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 281-301 doi: 10.1007/s11709-022-0807-3

Abstract: This paper presents a seismic topology optimization study of steel braced frames with shape memory alloyOptimal SMA-braced frames (SMA-BFs) with either Fe-based SMA or NiTi braces are determined in a performance-baseddistribution of lateral displacement over the frame height while being more cost-effective than NiTi braced framesIn frames with Fe-based SMA braces, the SMA usage is reduced by up to 80%.

Keywords： topology optimization     shape memory alloy     Fe-based SMA     steel braced frames     performance-based seismic    

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Finite element analysis of creep for plane steel frames in fire

Hui ZHU, Yuching WU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 297-307 doi: 10.1007/s11709-012-0162-x

Abstract: derived, and the corresponding numerical model is developed to study the creep behavior of plane steel framesNext, the numerical model is used to analyze the creep behavior of the plane steel frames under decreasingIn addition, the heating rate is a critical factor in the failure point of the steel frames.

Keywords： creep     plane steel frame     fire     finite element method     geometric nonlinearity    

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Seismic performance of composite moment-resisting frames achieved with sustainable CFST members

A. SILVA,Y. JIANG,L. MACEDO,J. M. CASTRO,R. MONTEIRO,N. SILVESTRE

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 312-332 doi: 10.1007/s11709-016-0345-y

Abstract: columns made with Rubberized Concrete (RuC), and to assess the seismic performance of moment-resisting framesAdditionally, it was found that the seismic design of composite moment-resisting frames with CFST columnsonly leads to lighter design solutions but also to enhanced seismic performance in comparison to steel frames

Keywords： concrete filled steel tubes     rubberized concrete     composite frames     seismic performance assessment    

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Optimal design of steel portal frames based on genetic algorithms

CHEN Yue, HU Kai

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 318-322 doi: 10.1007/s11709-008-0055-1

Abstract: As for the optimal design of steel portal frames, due to both the complexity of cross selections of beamsBased on a set of constraints of the Technical Specification for Light-weighted Steel Portal Frames ofChina, a genetic algorithm (GA) optimization program for portal frames, written in MATLAB code, was

Keywords： satisfactory     genetic-algorithm-based     Technical Specification     algorithm     efficiency    

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Predetermination of potential plastic hinges on reinforced concrete frames using GFRP reinforcement

Dominik KUERES; Dritan TOPUZI; Maria Anna POLAK

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 5,   Pages 624-637 doi: 10.1007/s11709-022-0832-2

Abstract: idea, this paper presents a novel concept for the predetermination of potential plastic hinges in RC frameshigh efficiency of hybrid steel-GFRP RC sections for predetermining potential plastic hinges on RC frames

Keywords： glass fiber-reinforced polymer     GFRP     hybrid section     plastic hinge     seismic design     reinforced concrete    

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Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 323-334 doi: 10.1007/s11709-011-0119-5

Abstract: Post-tensioned (PT) self-centering moment frames have been developed as an alternative to typical moment-resistingframes (MRFs) for earthquake resistance.reduced-scale, two-by-two bay one-story specimen, which comprises one PT frame and two gravitational framesThe PT frame and gravitational frames are self-centering throughout the tests, responding in phase with

Keywords： post-tensioned frame     frame expansion     column restraint     sliding slab     frame test     shake table test    

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Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames

Bing XIA, Yuching WU, Zhanfei HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 257-266 doi: 10.1007/s11709-012-0163-9

Abstract: forms of finite element formulations are derived to perform elasto-plastic analysis for plane steel framesof geometric nonlinearities on the incremental steps of the finite element analysis for plane steel frames

Keywords： co-rotational     total Lagrangian     geometrical nonlinearity     fire     elasto-plastic    

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Design Method and Applcation of Steel Braced Frames

Guan Kejian,Wang Xinwu,Peng Shaomin

Strategic Study of CAE 2003, Volume 5, Issue 5,   Pages 80-83

Abstract:

In the paper, three types of steel braced frames are introduced.The features of concentrically steel braced frames, eccentrically braced frames and off-centrically bracedframes and their application scope are concluded.Some calculating rules and design methods about concentrically steel braced frames and eccentricallybraced frames are put forward.

Keywords： steel structure     braced frames     design methcxl    

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A multi-objective design method for seismic retrofitting of existing reinforced concrete frames using

Yue CHEN; Rong XU; Hao WU; Tao SHENG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 9,   Pages 1089-1103 doi: 10.1007/s11709-022-0851-z

Abstract: variety of technical ways have been developed in seismic retrofitting of existing reinforced concrete frames

Keywords： pin-supported rocking wall     reinforced concrete frame     seismic retrofit     stiffness demand     drift concentration factor     multi-objective design     genetic algorithm     Pareto optimal solution    

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Seismic responses and resilience of novel SMA-based self-centring eccentrically braced frames under near-fault

Zhi-Peng CHEN; Songye ZHU

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 962-975 doi: 10.1007/s11709-022-0873-6

Abstract: In this paper, the seismic responses and resilience of a novel K-type superelastic shape memory alloy (SMA) self-centring (SC) eccentrically braced frame (EBF) are investigated. The simulation models of the SMA-based SC-EBF and a corresponding equal-stiffness traditional EBF counterpart are first established based on some existing tests. Then twenty-four near-fault ground motions are used to examine the seismic responses of both EBFs under design basis earthquake (DBE) and maximum considered earthquake (MCE) levels. Structural fragility and loss analyses are subsequently conducted through incremental dynamic analyses (IDA), and the resilience of the two EBFs are eventually estimated. The resilience assessment basically follows the framework proposed by Federal Emergency and Management Agency (FEMA) with the additional consideration of the maximum residual inter-storey drift ratio (MRIDR). The novel SMA-based SC-EBF shows a much better resilience in the study and represents a promising attractive alternative for future applications.

Keywords： shape memory alloy     eccentrically braced frame     self-centring     fragility     loss function     resilience    

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Seismic progressive-failure analysis of tall steel structures under beam-removal scenarios

Behrouz BEHNAM, Fahimeh SHOJAEI, Hamid Reza RONAGH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 904-917 doi: 10.1007/s11709-019-0525-7

Abstract: Investigating progressive collapse of tall structures under beam removal scenarios after earthquake is a complex subject because the earthquake damage acts as an initial condition for the subsequent scenario. An investigation is performed here on a 10 story steel moment resisting structure designed to meet the life safety level of performance when different beam removal scenarios after earthquake are considered. To this end, the structure is first subjected to the design earthquake simulated by Tabas earthquake acceleration. The beam removal scenarios are then considered at different locations assuming that both ends connections of the beam to columns are simultaneously detached from the columns; thus the removed beam falls on the underneath floor with an impact. This imposes considerable loads to the structure leading to a progressive collapse in all the scenarios considered. The results also show that the upper stories are much more vulnerable under such scenarios than the lower stories. Hence, more attention shall be paid to the beam-to-column connections of the upper stories during the process of design and construction.

Keywords： progressive collapse     tall steel moment-resisting frames     non-linear dynamic analysis     beam-removal scenario    

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Title Author Date Type Operation

Seismic retrofit of existing SRC frames using rocking walls and steel dampers

Akira WADA, Zhe QU, Shojiro MOTOYUI, Hiroyasu SAKATA

Journal Article

Damage identification in connections of moment frames using time domain responses and an optimization

Journal Article

Performance evaluation of low-rise infilled reinforced concrete frames designed by considering local

Journal Article

Multi-objective optimal design of braced frames using hybrid genetic and ant colony optimization

Mehdi BABAEI,Ebrahim SANAEI

Journal Article

Topology optimization and seismic collapse assessment of shape memory alloy (SMA)-braced frames: Effectiveness

Aydin HASSANZADEH; Saber MORADI

Journal Article

Finite element analysis of creep for plane steel frames in fire

Hui ZHU, Yuching WU

Journal Article

Seismic performance of composite moment-resisting frames achieved with sustainable CFST members

A. SILVA,Y. JIANG,L. MACEDO,J. M. CASTRO,R. MONTEIRO,N. SILVESTRE

Journal Article

Optimal design of steel portal frames based on genetic algorithms

CHEN Yue, HU Kai

Journal Article

Predetermination of potential plastic hinges on reinforced concrete frames using GFRP reinforcement

Dominik KUERES; Dritan TOPUZI; Maria Anna POLAK

Journal Article

Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

Journal Article

Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames

Bing XIA, Yuching WU, Zhanfei HUANG

Journal Article

Design Method and Applcation of Steel Braced Frames

Guan Kejian,Wang Xinwu,Peng Shaomin

Journal Article

A multi-objective design method for seismic retrofitting of existing reinforced concrete frames using

Yue CHEN; Rong XU; Hao WU; Tao SHENG

Journal Article

Seismic responses and resilience of novel SMA-based self-centring eccentrically braced frames under near-fault

Zhi-Peng CHEN; Songye ZHU

Journal Article

Seismic progressive-failure analysis of tall steel structures under beam-removal scenarios

Behrouz BEHNAM, Fahimeh SHOJAEI, Hamid Reza RONAGH

Journal Article