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Online since: May 2011
Authors: Yu Lan Wang
The seismic damages showed that wooden buildings possess stronger seismic behavior.
In Chinese ancient wooden structures, wooden beams, wooden purlins, wooden columns, bucket arches and sparrow braces were applied to many palaces, temples, pavilions and ordinary residences.
Although the mechanical behaviors of masonry structure are improved by increasing reinforced concrete circle beam and reinforced concrete constructional column after Tangshan earthquake[8].
Wood possesses excellent temperature preservation and heat insulation behavior because thermal conductivity of wood is low.
Study on the Seismic Performance of Light Frame Construction and Components of the Multiple Use.
In Chinese ancient wooden structures, wooden beams, wooden purlins, wooden columns, bucket arches and sparrow braces were applied to many palaces, temples, pavilions and ordinary residences.
Although the mechanical behaviors of masonry structure are improved by increasing reinforced concrete circle beam and reinforced concrete constructional column after Tangshan earthquake[8].
Wood possesses excellent temperature preservation and heat insulation behavior because thermal conductivity of wood is low.
Study on the Seismic Performance of Light Frame Construction and Components of the Multiple Use.
Online since: May 2016
Authors: Ivan Holly, Ivan Harvan
- Applicable for composite construction: precast members may frequently be combined with cast-in-place concrete to improve the monolithic behavior of the structure
This effect may become important when the joint thickness is greater than 50mm.
Such connection should be designed and detailed to have a ductile behavior.
Moment resistant connections are used mainly to: - Stabilize and increase stiffness of portal and skeletal frames, - Reduce the depth of flexural frame members, - Distribute second order moments in to beams and slabs, and hence reduce column moments, - Improve the resistance to progressive collapse.
The upper element is lowered into position and temporarily braced during grouting.
This effect may become important when the joint thickness is greater than 50mm.
Such connection should be designed and detailed to have a ductile behavior.
Moment resistant connections are used mainly to: - Stabilize and increase stiffness of portal and skeletal frames, - Reduce the depth of flexural frame members, - Distribute second order moments in to beams and slabs, and hence reduce column moments, - Improve the resistance to progressive collapse.
The upper element is lowered into position and temporarily braced during grouting.
Online since: June 2015
Authors: Juraj Kralik
The value of the HCLPF parameter depends on the equipment structure or component resistance (R) and the corresponding effect of action (E) using elastic or inelastic behavior.
This embedment has generally two effects on the dynamic analysis of the building: · In comparison to a surface foundation the dynamic behavior of the foundation is different.
The NPP building was meshed [5] by the 3D finite elements model to obtain realistic behavior of structure.
Spectral analysis results from linear behavior of structures and the appropriate damping due to structure plasticity is considered by proportional damping for the whole structure or separately by materials.
Kraálik, J., jr., Seismic Analysis of Reinforced Concrete Frame-Wall Systems Considering Ductility Effects in Accordance to Eurocode.
This embedment has generally two effects on the dynamic analysis of the building: · In comparison to a surface foundation the dynamic behavior of the foundation is different.
The NPP building was meshed [5] by the 3D finite elements model to obtain realistic behavior of structure.
Spectral analysis results from linear behavior of structures and the appropriate damping due to structure plasticity is considered by proportional damping for the whole structure or separately by materials.
Kraálik, J., jr., Seismic Analysis of Reinforced Concrete Frame-Wall Systems Considering Ductility Effects in Accordance to Eurocode.
Online since: September 2011
Authors: Feng Hua Zhao, Jun Yang
In this paper, by simple comparative analysis, based on the custom characteristics of the said multi-storey steel structure system, the basic seismic isolated technology is taken into consideration, the earthquake resistant behavior of steel structure seismic isolation system is studied, and the application of relevant seismic isolated technology in residential steel structure projects is discussed.
As a matter of fact, should the buckling restrained brace, damper and seismic isolation system are combined together, the generated effects would be much better.
This is the method of “conquering the unyielding with the yielding” Comprehensively considering the size of structural components, requirements toward bearing capacity, and estimated effects of vibration isolation, pick a type of seismic isolation support saddles which is made of LRB600-120 lead-filled laminated rubber, and then put one of them under each frame column.
The seismic isolation device has variable horizontal stiffness, allowing it to have enough big horizontal initial stiffness, so that the using requirements will not be negatively influenced when the strong wind comes.
refers to the ratio between the stiffness of superstructure after yielding and the initial stiffness.
As a matter of fact, should the buckling restrained brace, damper and seismic isolation system are combined together, the generated effects would be much better.
This is the method of “conquering the unyielding with the yielding” Comprehensively considering the size of structural components, requirements toward bearing capacity, and estimated effects of vibration isolation, pick a type of seismic isolation support saddles which is made of LRB600-120 lead-filled laminated rubber, and then put one of them under each frame column.
The seismic isolation device has variable horizontal stiffness, allowing it to have enough big horizontal initial stiffness, so that the using requirements will not be negatively influenced when the strong wind comes.
refers to the ratio between the stiffness of superstructure after yielding and the initial stiffness.
Online since: June 2012
Authors: Michael J. Richard, Kent A. Harries
Specifically of interest wasthe effect of ‘bamboo stitching’ on improving column behaviour in the bamboo culms.
The behaviour of multiple-culm columns was shown to exhibit load redistribution and to mimic the sum of individual culm capacities rather than composite column behaviour.
The variation in the cross section itself also effects the calculation of an effective value for the sectional stiffness (EI).
While these results proved inconclusive, the effect of this stitch behaviour must be considered where transverse or in-plane bolted connections to these columns exist in the field.
Mitch, Structural Behavior of Grouted-Bar Bamboo Column Bases.
The behaviour of multiple-culm columns was shown to exhibit load redistribution and to mimic the sum of individual culm capacities rather than composite column behaviour.
The variation in the cross section itself also effects the calculation of an effective value for the sectional stiffness (EI).
While these results proved inconclusive, the effect of this stitch behaviour must be considered where transverse or in-plane bolted connections to these columns exist in the field.
Mitch, Structural Behavior of Grouted-Bar Bamboo Column Bases.
Online since: October 2013
Authors: Ji Hao Chen, Yuan Bin Cheng, Xiao Fei Yin, Wu Qi Zhu, Hong Gang Zhang
According to the structure type and mechanical behavior of pillar supported house, there were limited columns in the lower layer, more walls and columns were in the upper layer, most of the structure load was distributed in the upper part, so the pillar supported house was irregular structure due to its variable stiffness.
Best adhesive effect can be obtained by contact close, smooth and exert a certain pressure.
Beams and columns were hollow sections in order to reduce the weight of structure and obtain highly bearing capacity and flexural stiffness.
Fig. 5 Force chart of transfer beam Conclusions In the previous experiment and testing, the model and its components had almost no damage, the model exhibited good behavior, and conversion of energy under every grades of impact loading was successfully realized.
Gao, Seismic Design of Engineering Structures, China Building Industry Press, Beijing, 2005
Best adhesive effect can be obtained by contact close, smooth and exert a certain pressure.
Beams and columns were hollow sections in order to reduce the weight of structure and obtain highly bearing capacity and flexural stiffness.
Fig. 5 Force chart of transfer beam Conclusions In the previous experiment and testing, the model and its components had almost no damage, the model exhibited good behavior, and conversion of energy under every grades of impact loading was successfully realized.
Gao, Seismic Design of Engineering Structures, China Building Industry Press, Beijing, 2005
Online since: December 2012
Authors: Muhammad Abu Eusuf, Abdullah Al Hasan
Similarly, amplitude, direction and location of dynamic forces, such as earthquakes, vary significantly with time, and cause considerable inertia effects on structures and behaviour depending upon the dynamic characteristics of structural elements, which are controlled by both their mass and stiffness properties.
The effect of wind on a structure depends upon the density and velocity of the air, the angle of incidence of the wind, the shape and stiffness of the structure, and the roughness of its surface.
Dead load of a building= weights of the frames + framing and bracing system + floors + roofs + ceilings + walls + stairways + heating and air- conditioning systems + plumbing system + electrical system + so on.
Behavior of masonry- infilled non-ductile reinforced Concrete frames, Structural Engineering 128(8): 1055–1063 (2002)
Mechanical behaviour of pitting corrosion of flexural and shear reinforcement and its effect on structural reliability of corroding RC beams.
The effect of wind on a structure depends upon the density and velocity of the air, the angle of incidence of the wind, the shape and stiffness of the structure, and the roughness of its surface.
Dead load of a building= weights of the frames + framing and bracing system + floors + roofs + ceilings + walls + stairways + heating and air- conditioning systems + plumbing system + electrical system + so on.
Behavior of masonry- infilled non-ductile reinforced Concrete frames, Structural Engineering 128(8): 1055–1063 (2002)
Mechanical behaviour of pitting corrosion of flexural and shear reinforcement and its effect on structural reliability of corroding RC beams.
Online since: July 2016
Authors: Adinda Chaerany, Henricus Priyosulistyo, Andreas Triwiyono, Ali Awaludin
Structural condition assessment was conducted to a single-story, steel-framed maintenance plant.
Literature Review In 2013, Kinoshita brought up a discussion of steel-frame retrofit work, aiming to mitigate fatigue damage and study the seismic behavior of steel frame piers [1].
Gonzáles et al. recommended DAF values of 1.2 to 1.5 to achieve satisfactory vibration behavior under serviceability condition [14].
Determination of spring stiffness k over the column locations along the crane runway sections Estimation of Remaining Service Life.
Seismic Behavior of Fatigue-Retrofitted Steel Frame Piers.
Literature Review In 2013, Kinoshita brought up a discussion of steel-frame retrofit work, aiming to mitigate fatigue damage and study the seismic behavior of steel frame piers [1].
Gonzáles et al. recommended DAF values of 1.2 to 1.5 to achieve satisfactory vibration behavior under serviceability condition [14].
Determination of spring stiffness k over the column locations along the crane runway sections Estimation of Remaining Service Life.
Seismic Behavior of Fatigue-Retrofitted Steel Frame Piers.
Online since: December 2012
Authors: Donato Cancellara, Fabio de Angelis, Mario Pasquino
This device is intended to satisfy the following requirements:
- for seismic design relative to Ultimate Limit States (Human Life Safeguard Limit State and Collapse Prevention Limit State) it is predicted the activation of only the LRB device, thus ensuring a performance level which guarantees the elastic behavior of the superstructure or eventually the reduced and controlled damage (behavior factor qmax=1.5).
In order to describe the behavior of the FS isolator a nonlinear finite element NLlink “Friction Pendulum Isolator” has been adopted.
For adopting in the device plastic and viscoplastic material behavior with local and nonlocal effects and nonlinear kinematic hardening effects see e.g.
Rate effects in the plastic and viscoplastic material behavior are investigated e.g. by De Angelis [22][23][24], De Angelis Cancellara Modano and Pasquino [25] and De Angelis and Cancellara [26][27].
Base-Isolated RC frame structures (in Italian), Ingegneria Sismica, Vol.26 (2), pp.50-61, (2009)
In order to describe the behavior of the FS isolator a nonlinear finite element NLlink “Friction Pendulum Isolator” has been adopted.
For adopting in the device plastic and viscoplastic material behavior with local and nonlocal effects and nonlinear kinematic hardening effects see e.g.
Rate effects in the plastic and viscoplastic material behavior are investigated e.g. by De Angelis [22][23][24], De Angelis Cancellara Modano and Pasquino [25] and De Angelis and Cancellara [26][27].
Base-Isolated RC frame structures (in Italian), Ingegneria Sismica, Vol.26 (2), pp.50-61, (2009)
Online since: November 2019
Authors: Mohammad Shamim Miah, Md. Jihad Miah, Md. Ashik Hossain
Effect of Modal Mass
The performance of TMD heavily relies on its mass, damping and stiffness.
The Figs. 12-17 are presenting the effect of modal mass on the displacement behavior of the structure carrying extra masses of 25 kg, 30 kg and 35 kg on 1st and 2nd floor.
Miah, Dynamic Behavior of Bridge with New Innovative Type Spherical Elastomeric Bearing.
Hosseini, Dynamic behavior of steel frames with tuned mass dampers, Advances in Science and Technology-Research Journal, 11(2), (2017) 146–158
Klingner, Effect of tuned-mass dampers on seismic response.
The Figs. 12-17 are presenting the effect of modal mass on the displacement behavior of the structure carrying extra masses of 25 kg, 30 kg and 35 kg on 1st and 2nd floor.
Miah, Dynamic Behavior of Bridge with New Innovative Type Spherical Elastomeric Bearing.
Hosseini, Dynamic behavior of steel frames with tuned mass dampers, Advances in Science and Technology-Research Journal, 11(2), (2017) 146–158
Klingner, Effect of tuned-mass dampers on seismic response.