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The seismic analysis and design for the masonry buildingsin rural villages located in meizoseismal areas

Feng Yuan,Yi Dan,Bi Qiong

Strategic Study of CAE 2009, Volume 11, Issue 6,   Pages 138-145

Abstract:

Based on the characteristics of large spacing masonry buildings withfew transverse walls and theseismic hazards on teaching buildings, the authors analyzed the effects ofconstructional columns and ring beams to the seismic resistance of buildings and presented the conceptof improving ductility of buildings.Some suggestions were then proposed for the design of this type

Keywords： large spacing masonry buildings with few transverse walls     constructional columns     ring beams     ductility     walls between windows    

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Seismic fragility assessment of revised MRT buildings considering typical construction changes

Rakesh DUMARU, Hugo RODRIGUES, Humberto VARUM

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 241-266 doi: 10.1007/s11709-019-0560-4

Abstract: study investigates the vulnerability assessment of the prototype revised Mandatory Rule of Thumb (MRT) buildingsmodified through variable number of storeys (three, four, and five) and different arrangement of infill wallsThe application of infill walls increases the fundamental frequencies, stiffness, and maximum strengthThe vulnerability was also reduced through infill walls, where the probability of exceeding partial-collapseAnd increase in number of storeys causes building highly vulnerable although the infill walls were considered

Keywords： mid-rise buildings     revised NBC 205: 2012     masonry infill walls     configurations of infill walls     vulnerability    

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Mechanical properties characterization of different types of masonry infill walls

André FURTADO, Hugo RODRIGUES, António ARÊDE, Humberto VARUM

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 411-434 doi: 10.1007/s11709-019-0602-y

Abstract: paper is to present an extensive experimental campaign of mechanical characterization tests of infill masonrywalls made with three different types of masonry units: lightweight vertical hollow concrete blockssecond objective of this study was to compare the mechanical properties of as-built and existing infill walls

Keywords： masonry infill walls     experimental characterization     compression strength     shear diagonal strength     flexural    

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A method to predict cooling load of large commercial buildings based on weather forecast and internal

Junbao JIA,Jincheng XING,Jihong LING,Ren PENG

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 459-465 doi: 10.1007/s11708-016-0424-8

Abstract: Considering the fact that customers of large commercial buildings have the characteristics of the higher

Keywords： commercial building     load prediction     multiple linear regression    

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Self-centering steel plate shear walls for improving seismic resilience

Patricia M. CLAYTON,Daniel M. DOWDEN,Chao-Hsien LI,Jeffrey W. BERMAN,Michel BRUNEAU,Laura N. LOWES,Keh-Chuan TSAI

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 283-290 doi: 10.1007/s11709-016-0344-z

Abstract: As part of a Network for Earthquake Engineering Simulation research project led by researchers at the University of Washington with collaborators at University at Buffalo, and Taiwan National Center for Research on Earthquake Engineering, a self-centering steel plate shear wall (SC-SPSW) system has been developed to achieve enhanced seismic performance objectives, including recentering. The SC-SPSW consists of thin steel infill panels, referred to as web plates that serve as the primary lateral load-resisting and energy dissipating element of the system. Post-tensioned (PT) beam-to-column connections provide system recentering capabilities. A performance-based design procedure has been developed for the SC-SPSW, and a series of nonlinear response history analyses have been conducted to verify intended seismic performance at multiple hazard levels. Quasi-static subassembly tests, quasi-static and shake table tests of scaled three-story specimens, and pseudo-dynamic tests of two full-scale two-story SC-SPSWs have been conducted. As a culmination of this multi-year, multi-institutional project, this paper will present an overview of the SC-SPSW numerical and experimental research programs. This paper will also discuss innovative PT connection and web plate designs that were investigated to improve constructability, resilience, and seismic performance and that can be applied to other self-centering and steel plate shear wall systems.

Keywords： self-centering     steel plate shear walls     large-scale experiment     post-tensioned connections     performance-based    

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Artificial Neural Networks to estimate seismic damage and derive vulnerability functions for traditional masonry

Tiago Miguel FERREIRA, João ESTÊVÃO, Rui MAIO, Romeu VICENTE

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 609-622 doi: 10.1007/s11709-020-0623-6

Abstract: This paper discusses the adoption of Artificial Intelligence-based techniques to estimate seismic damage, not with the goal of replacing existing approaches, but as a mean to improve the precision of empirical methods. For such, damage data collected in the aftermath of the 1998 Azores earthquake (Portugal) is used to develop a comparative analysis between damage grades obtained resorting to a classic damage formulation and an innovative approach based on Artificial Neural Networks (ANNs). The analysis is carried out on the basis of a vulnerability index computed with a hybrid seismic vulnerability assessment methodology, which is subsequently used as input to both approaches. The results obtained are then compared with real post-earthquake damage observation and critically discussed taking into account the level of adjustment achieved by each approach. Finally, a computer routine that uses the ANN as an approximation function is developed and applied to derive a new vulnerability curve expression. In general terms, the ANN developed in this study allowed to obtain much better approximations than those achieved with the original vulnerability approach, which has revealed to be quite non-conservative. Similarly, the proposed vulnerability curve expression was found to provide a more accurate damage prediction than the traditional analytical expressions.

Keywords： Artificial Neural Networks     seismic vulnerability     masonry buildings     damage estimation     vulnerability curves    

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Confined masonry as practical seismic construction alternative–the experience from the 2014 Cephalonia

Fillitsa KARANTONI, Stavroula PANTAZOPOULOU, Athanasios GANAS

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 3,   Pages 270-290 doi: 10.1007/s11709-017-0390-1

Abstract: almost the entire building stock of the Island which consisted primarily of traditional unreinforced masonryof the building stock, using a structural system that is most like what is known today as confined masonryThese buildings are known as “Arogi” buildings (Arogi in Greek meaning Aid).Surprisingly, no damage was reported in the “Arogi” buildings.The seismic behavior of the buildings is examined by FEM linear analysis and it is compared to that of

Keywords： Cephalonia     confined masonry     comparative FEM analysis     unreinforced masonry     seismic damage    

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Laser vision sensing based on adaptive welding for aluminum alloy

CHEN Zhixiang, SONG Yonglun, ZHANG Jun, ZHANG Wanchun, JIANG Li, XIA Xuxin

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 218-223 doi: 10.1007/s11465-007-0038-2

Abstract: A laser vision sensing based on the adaptive tungsten inert gas (TIG) welding system for large-scalegeometry data, such as the bevel angle, the gap, the area, and the mismatch, etc., aided in assembling large-scaleThey were also applied for automatic seam tracking, such as automatic torch transverse alignment and

Keywords： adjustment     adaptive tungsten     transverse alignment     large-scale aluminum     geometry    

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Detection for transverse corner cracks of steel plates’ surface using wavelet

Qiong ZHOU, Qi AN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 224-227 doi: 10.1007/s11465-009-0017-x

Abstract: An algorithm is presented for detecting transverse corner cracks at a steel plate surface using waveletAccording to characteristics of transverse corner crack images, the wavelet transform is used for theThe experiment shows that transverse corner cracks of steel plates can be more effectively extracted

Keywords： transverse corner cracks     defect detection     multi-scales wavelet analysis    

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Experimental study on the compressive performance of new sandwich masonry walls

Jianzhuang XIAO, Jie PU, Yongzhong HU

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 154-163 doi: 10.1007/s11709-013-0203-0

Abstract: Sandwich masonry wall, namely, multi-leaf masonry wall, is widely applied as energy-saving wall sinceNew types of sandwich walls keep appearing in research and application, and due to their unique connectiondifferent technical measures were considered to guarantee the cooperation between the two leaves of the wallswalls, several new failure patterns are found due to unique connection construction details.walls.

Keywords： sandwich wall     insulation wall     connection     compressive performance     compression test    

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Slender reinforced concrete shear walls with high-strength concrete boundary elements

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 138-151 doi: 10.1007/s11709-022-0897-y

Abstract: Reinforced concrete structural walls are commonly used for resisting lateral forces in buildings.Owing to the advancements in the field of concrete materials over the past few decades, concrete mixesIn this study, the effects of strategic placement of HSC on the performance of slender walls were examined

Keywords： slender walls     high-strength concrete     rectangular and barbell-shaped walls     cold joints    

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growth of a-few-layered MoS on CdS nanorod for high efficient photocatalytic H production

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 752-759 doi: 10.1007/s11708-021-0779-3

Abstract: An ultrathin MoS2 was grown on CdS nanorod by a solid state method using sulfur powder as sulfur source for photocatalytic H2 production. The characterization result reveals that the ultrathin MoS2 nanosheets loaded on CdS has a good contact state. The photoelectrochemical result shows that MoS2 not only are beneficial for charge separation, but also works as active sites, thus enhancing photocatalytic activity. Compared with pure CdS, the photocatalytic activity of MoS2 loaded CdS was significantly improved. The hydrogen evolution rate on m(MoS2): m(CdS) = 1: 50 (m is mass) reaches 542 μmol/h, which is 6 times of that on pure CdS (92 μmol/h). This work provides a new design for photocatalysts with high photocatalytic activities and provides a deeper understanding of the effect of MoS2 on enhancing photocatalytic activity.

Keywords： photocatalytic H2 production     CdS     MoS2 cocatalyst     charge separation    

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Behaviour of self-centring shear walls——A state of the art review

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 53-77 doi: 10.1007/s11709-022-0850-0

Abstract: incorporation of prefabricated elements and segmental construction for different materials (e.g., concrete, masonryConcrete, masonry, and timber are often used for the construction of unbonded PT structural wall systemsAn extensive study was carried out to collect a database of 100 concrete, masonry, and self-centringThe behaviour of concrete, masonry and timber shear walls were compared and critically analysed., material used for construction of the wall (concrete, masonry, timber) and axial stress ratio.

Keywords： self-centring shear walls     rocking walls     energy dissipation     seismic performance factors     PT loss     residual    

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Self-centring segmental retaining walls—A new construction system for retaining walls

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 980-1000 doi: 10.1007/s11709-021-0737-5

Abstract: Four post-tensioned segmental retaining walls (PSRWs) were experimentally tested.Each of the walls was constructed using seven T-shaped concrete segments with a dry stack.The walls were tested under incrementally increasing cyclic lateral load.

Keywords： retaining wall     segmental     precast concrete     unbonded post-tensioning     water retaining wall     seawall    

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Seismic safety evaluation methodology for masonry building and retrofitting using splint and bandage

Pravin Kumar Venkat Rao PADALU; Yogendra SINGH

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4,   Pages 478-505 doi: 10.1007/s11709-022-0817-1

Abstract: The paper presents a seismic safety assessment of unreinforced masonry (URM) building using two approachesThe analysis results showed that few wall elements are unsafe in in-plane and out-of-plane tension., the retrofitting design methodology and recommendations for application procedures to on-site URM buildings

Keywords： unreinforced masonry     seismic in-plane and out-of-plane forces     pier analysis     finite element modelling    

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Title Author Date Type Operation

The seismic analysis and design for the masonry buildingsin rural villages located in meizoseismal areas

Feng Yuan,Yi Dan,Bi Qiong

Journal Article

Seismic fragility assessment of revised MRT buildings considering typical construction changes

Rakesh DUMARU, Hugo RODRIGUES, Humberto VARUM

Journal Article

Mechanical properties characterization of different types of masonry infill walls

André FURTADO, Hugo RODRIGUES, António ARÊDE, Humberto VARUM

Journal Article

A method to predict cooling load of large commercial buildings based on weather forecast and internal

Junbao JIA,Jincheng XING,Jihong LING,Ren PENG

Journal Article

Self-centering steel plate shear walls for improving seismic resilience

Patricia M. CLAYTON,Daniel M. DOWDEN,Chao-Hsien LI,Jeffrey W. BERMAN,Michel BRUNEAU,Laura N. LOWES,Keh-Chuan TSAI

Journal Article

Artificial Neural Networks to estimate seismic damage and derive vulnerability functions for traditional masonry

Tiago Miguel FERREIRA, João ESTÊVÃO, Rui MAIO, Romeu VICENTE

Journal Article

Confined masonry as practical seismic construction alternative–the experience from the 2014 Cephalonia

Fillitsa KARANTONI, Stavroula PANTAZOPOULOU, Athanasios GANAS

Journal Article

Laser vision sensing based on adaptive welding for aluminum alloy

CHEN Zhixiang, SONG Yonglun, ZHANG Jun, ZHANG Wanchun, JIANG Li, XIA Xuxin

Journal Article

Detection for transverse corner cracks of steel plates’ surface using wavelet

Qiong ZHOU, Qi AN

Journal Article

Experimental study on the compressive performance of new sandwich masonry walls

Jianzhuang XIAO, Jie PU, Yongzhong HU

Journal Article

Slender reinforced concrete shear walls with high-strength concrete boundary elements

Journal Article

growth of a-few-layered MoS on CdS nanorod for high efficient photocatalytic H production

Journal Article

Behaviour of self-centring shear walls——A state of the art review

Journal Article

Self-centring segmental retaining walls—A new construction system for retaining walls

Journal Article

Seismic safety evaluation methodology for masonry building and retrofitting using splint and bandage

Pravin Kumar Venkat Rao PADALU; Yogendra SINGH

Journal Article