Experimental Research of Lightweight Composite Wall on Lateral and Vertical Loads

2013 ◽  
Vol 838-841 ◽  
pp. 514-518
Author(s):  
Yi Qing Guo ◽  
Ping Zhou Cao
Keyword(s):  
Steel Structure ◽  
The Self ◽  
Deformation Capacity ◽  
Light Weight ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
New Type ◽  
Composite Wall ◽  
Thin Panel ◽  
Screw Pitch

To overcome the shortcomings of assembly lightweight steel structure residential system in our country. A new type of lightweight energy-saving composite wall is proposed, which is composed by light-gauge shaped steel and thin panel. In order to investigate the load-bearing behaviour and failure mode of the composite wall, 4 wall specimens in full ratio were designed and manufactured. The experiment study is carried out under lateral and vertical loads. The results show that the self-drilling screw integrate the light-gauge shaped steel and thin panel to bear loads. The decrease of self-drilling screw spacing can effectively enhance the load-bearing capacity of the composite wall, and the best choice of the self-drilling screw pitch is 150mm. The composite wall has good bearing and deformation capacity, and it is suitable for applying to light weight steel residential system in our country.

Experimental and numerical investigation on the vertical bearing behavior of discrete connected new-type precast reinforced concrete floor system

2020 ◽  
Vol 23 (11) ◽  
pp. 2276-2291
Author(s):  
Rui Pang ◽  
Yibo Zhang ◽  
Longji Dang ◽  
Lanbo Zhang ◽  
Shuting Liang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Cover Plate ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Concrete Floor ◽  
New Type ◽  
Vertical Bearing ◽  
Floor System ◽  
Bearing Behavior

This article proposes a new type of discrete connected precast reinforced concrete diaphragm floor system that consists of precast flat slabs and slab joint connectors. An experimental investigation of discrete connected new-type precast reinforced concrete diaphragm under a vertical distributed static load was conducted, and the effect of slab joint connectors on the load-bearing capacity was evaluated. Then, a finite element analysis of discrete connected new-type precast reinforced concrete diaphragm, precast reinforced concrete floors without slab connectors, and cast-in-situ reinforced concrete floor were performed to understand their working mechanism and determine the differences in load-bearing behavior. The results indicate that the load-bearing capacity and stiffness of discrete connected new-type precast reinforced concrete diaphragm increase considerably as the hairpin and cover plate hybrid slab joint connectors can efficiently connect adjacent precast slabs and enable them to work together under a vertical load by transmitting the shear and moment forces in the orthogonal slab laying direction. The deflection of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction is mainly caused by the opening deformation of the slab joint and the rotational deformation of the precast slabs. This flexural deformation feature can provide reference for establishing the bending stiffness analytical model of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction, which is vitally important for foundation of the vertical bearing capacity and deformation calculation method. The deflection and crack distribution patterns infer that the discrete connected new-type precast reinforced concrete diaphragm processes the deformation characteristic of two-way slab floor, which can provide a basis for the theoretical analysis of discrete connected new-type precast reinforced concrete diaphragm.

Experiment of the SCT Joint under Complicated Loading

2011 ◽  
Vol 255-260 ◽  
pp. 607-613
Author(s):  
Bing Liao ◽  
Yong Feng Luo ◽  
Xiao Nong Guo
Keyword(s):  
Bearing Capacity ◽  
Loading Condition ◽  
Steel Structure ◽  
Force Transmission ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Roof Structure ◽  
Axial Forces ◽  
Out Of Plane ◽  
Water Sports

A radial-circle-lined grid shell, its height changed step by step in the radial direction, is adopted in the roof steel structure of the Citizen Water Sports Center in Jiangyin, China. And the Spatial Crossing Tubular (SCT) joint is used for the connection of pipe members. Because the force transmission in the roof structure is different from the traditional truss structure, a lot of SCT joints are in a complicated loading state. The joint forces include axial forces and in/out-of-plane moments. To investigate the mechanical behavior and the load-bearing capacity of a typical SCT joint in such complicated loading condition, a full size model test of the typical SCT joint is conducted. The test process is summarized in the paper, together with the finite element calculation of the typical SCT joint in test conditions. By comparing the numerical results with the test results, several significant parameters of the connection are investigated, including the stiffness change of the joint, the transmission mechanism of forces, the ultimate load-bearing capacity and the failure mode of the joint. After investigation, several useful suggestions are proposed for the SCT joint design. They are also valuable for the design of similar SCT joints under complicated loading condition.

scholarly journals Seismic performance of a load-bearing prefabricated composite wall panel structure for residential construction

2020 ◽  
Vol 23 (13) ◽  
pp. 2928-2941
Author(s):  
Qunyi Huang ◽  
John Orr ◽  
Yanxia Huang ◽  
Feng Xiong ◽  
Hongyu Jia
Keyword(s):  
Bearing Capacity ◽  
Seismic Performance ◽  
Seismic Design ◽  
Rural Areas ◽  
Wall Panel ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Ductility Factor ◽  
Seismic Design Code ◽  
Composite Wall

To improve both seismic performance and thermal insulation of low-rise housing in rural areas of China, this study proposes a load-bearing prefabricated composite wall panel structure that achieves appropriate seismic performance and energy efficiency using field-assembled load-bearing prefabricated composite wall panels. A 1:2 scale prototype built using load-bearing prefabricated composite wall panel is subjected to quasi-static testing so as to obtain damage characteristics, load-bearing capacity and load–displacement curves in response to a simulated earthquake. As a result, seismic performance indicators of load-bearing capacity, deformation and energy-dissipating characteristics, are assessed against the corresponding seismic design requirements for rural building structures of China. Experimental results indicate that the earthquake-resistant capacity of the prototype is 68% higher than the design value. The sample has a ductility factor of 4.7, which meets the seismic performance requirement mandating that the ductility factor of such concrete structures should exceed 3. The design can be further optimized to save the consumption of material. This shows that the load-bearing prefabricated composite wall panel structure developed here has decent load-bearing capacity, ductility and energy dissipation abilities, a combination of which is in line with the seismic design code. A new construction process proposed here based on factory prefabrication and field assembly leads to a considerable reduction of energy consumption.

Finite Element Analysis of Lightweight Energy-Saving Composite Floor

2014 ◽  
Vol 665 ◽  
pp. 196-202
Author(s):  
Yi Qing Guo ◽  
Ping Zhou Cao
Keyword(s):  
Finite Element ◽  
Elastic Modulus ◽  
Bearing Capacity ◽  
Energy Saving ◽  
Element Model ◽  
Finite Element Models ◽  
Load Bearing Capacity ◽  
Element Analysis ◽  
Load Bearing ◽  
Thin Panel

In order to study the performance of lightweight energy-saving composite floor, the finite element models of composite floor were established, which was based on the composite floor specimens test research. The finite element models were verified rationally and correctly in the paper, through compared with the composite floor test results. The finite element model can be used to analyze the load-bearing capacity of composite floor. Various influencing factors of composite floor with simply supported end were analyzed, such as the span of self-tapping screw, the diameter of self-tapping screw, the strength of thin panel and the elastic modulus of thin panel, etc. The results show that the load-bearing capacity of composite floor increases with the increase of the number of self-tapping screw, the diameter of self-tapping screw, the strength of thin panel and the elastic modulus of thin panel, etc. The load-bearing capacity calculate formula of composite floor was proposed.

Numerical Analysis of Masonry Enhanced by Fiber Reinforced Lime-Based Render

2014 ◽  
Vol 624 ◽  
pp. 246-253
Author(s):  
Michal Přinosil ◽  
Petr Kabele
Keyword(s):  
Numerical Simulations ◽  
Bearing Capacity ◽  
High Performance ◽  
Masonry Wall ◽  
Deformation Capacity ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Out Of Plane ◽  
Brittle Fiber

Out of plane load bearing capacity of a masonry structure enhanced by surface render made of high performance lime-based mortar is investigated by numerical simulations using the finite element method (FEM). The response of the wall is simulated firstly without render (as a reference) then with surface render consisting of conventional lime mortar with increased tensile strength (by addition of the metakaolin) without fibers and finally with the proposed lime-metakaolin mortar reinforced with PVA fibers. The thickness of the surface render is considered in two configurations (20 mm and 40 mm). Material parameters of masonry units (bricks), joints (mortar between bricks) and conventional plain render are chosen with regard to investigations of historic structures (reported in the literature), material characteristics of fiber reinforced render are evaluated based on experiments or numerical simulations of these experiments. Using these parameters and characteristics, the numerical simulations of masonry wall subjected to out of plane bending are performed. The results allow us to identify influence of the thickness and the material of render on load-bearing and deformation capacity, failure mode and amount and width of cracks. The results show that the conventional plain mortar improves load-bearing capacity and deformation capacity proportionately to the thickness of render, but the response remains brittle. Fiber reinforced mortar significantly increases the deformation capacity and load-bearing capacity and the amount of absorbed energy is significantly improved.

Light Gauge Steel-Light Weight Aggregate Concrete Structure and Application

2012 ◽  
Vol 479-481 ◽  
pp. 23-26
Author(s):  
Xiao Ping Wang ◽  
Tian Han ◽  
Fang Yin
Keyword(s):  
Calculation Result ◽  
Concrete Structure ◽  
Steel Structure ◽  
Future Research ◽  
Light Weight ◽  
Analysis Method ◽  
Design Code ◽  
Aggregate Concrete ◽  
New Type ◽  
Light Weight Aggregate

Light gauge steel-light weight aggregate concrete structure is a new type of structure system. This paper introduces the composition, characteristics and production and installation process of this kind of structure. For the Da Yunhe villas, as an example, this paper presents the structure detail and analysis method, and gives the bearing capacity and rigidity calculation result of the typical wall and floor beams, which verify the design code of the steel structure. This paper provides the beneficial reference and basis for future research and promotion.

Narrow Reinforced Concrete Slabs after their Flexural Destruction

2014 ◽  
Vol 969 ◽  
pp. 271-275 ◽  
Author(s):  
Mirosław Wieczorek
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
The Self ◽  
Concrete Slabs ◽  
Building Structures ◽  
Reinforcing Steel ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Horizontal Shift ◽  
Reinforced Concrete Slabs

In the course of the exploitation of building structures frequently situations turn up, in which the structure is not adequately used (it may, for instance, be exposed to considerably greater loads than previously been intended). In the state of an unforeseen overload of the structure, essential reserves of their load-bearing capacity may be disclosed in the case of the self-acting work as a flexible strand. The paper presents the results of investigations concerning the influence of the parameters of reinforcing steel on the mechanism of the destruction of six single-span models of narrow reinforced concrete slabs, in which a horizontal shift of the supports was not possible. The tests were carried out on narrow slabs with the dimensions 3860×480×100 mm. The results of the tests were compared with analytical calculations.

Analyses of Temperature Loads’ and Support Settlements’ Effect on Load Bearing Capacity of Arch-Reticulated Shell Hybrid Steel Structure of Beijing Jiangtai Winter Garden

2011 ◽  
Vol 243-249 ◽  
pp. 879-884
Author(s):  
Xiao Ping He ◽  
Yang Gao ◽  
Yong Jiu Shi ◽  
Yuan Qing Wang ◽  
Kai Lu
Keyword(s):  
Bearing Capacity ◽  
Steel Structure ◽  
Hybrid Structure ◽  
Load Bearing Capacity ◽  
Curtain Wall ◽  
Load Bearing ◽  
Steel Columns ◽  
Glass Curtain Wall ◽  
Comparative Results ◽  
Temperature Loads

To large span spatial structures, the displacements and internal forces caused by temperature loads and support settlements cannot be ignored. Beijing Jiangtai winter garden mainly consists of reticulated shell and glass curtain wall. The reticulated shell is composed of 9 spatial arches and other common frames, thus it can be seen as arch-reticulated shell hybrid structure. The two ends of the arches are supported at the top of steel columns and concrete walls separately. The glass curtain wall is fixed to vertical cables. This paper chose eight load cases including temperature loads and support settlements, and used ANSYS to analyze static responses of the structure under such load combinations. The comparative results showed that temperature loads had more effect on the structure’s load bearing capacity than support settlements. And the superiority of hybrid structures was fully embodied in the conclusions of this paper.

Comparative Analysis of Axially Loaded Composite Columns

2011 ◽  
Vol 147 ◽  
pp. 99-104 ◽  
Author(s):  
Moftah Almadini ◽  
Dusan Kovacevic ◽  
Vlastimir Radonjanin
Keyword(s):  
Bearing Capacity ◽  
High Strength Concrete ◽  
High Strength ◽  
Light Weight ◽  
Steel Tubes ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Composite Columns ◽  
Strength Concrete ◽  
Light Weight Concrete

Experiments on square and circular steel columns filled with light-weight concrete and high strength concrete have been conducted to investigate the contribution of these types of concrete to load bearing capacity of short composite columns. The aim of this research was to determine the effect of two types of concrete filling on behaviour of the composite columns. Thirteen specimens were divided in two groups: steel tubes filled with different type of concrete, with or without reinforcement and RC columns with same dimensions and shape, made of same type of concrete. Comparison was made between load bearing capacity of the steel tubes filled with light-weight concrete, and high strength concrete (with and without reinforcement). All specimens were tested by axial compression until to the failure state realization. Factors which influence the behavior and failure mode, ultimate strength, deflections and stress-strain relation were discussed.

scholarly journals Preliminary Analysis of the Aluminiumtimber Composite Beams

2017 ◽  
Vol 27 (4) ◽  
pp. 131-141 ◽  
Author(s):  
Maciej Szumigała ◽  
Marcin Chybiński ◽  
Łukasz Polus
Keyword(s):  
Bearing Capacity ◽  
Aluminium Alloys ◽  
Composite Structures ◽  
Preliminary Analysis ◽  
Composite Beams ◽  
High Price ◽  
Timber Beam ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
New Type

Abstract This paper presents a new type of composite structures - aluminium-timber beams. These structures have an advantage over other existing composite structures, because they are lighter. However, their application may be limited due to the high price of aluminium alloys. The authors of this article made an attempt to calculate the load-bearing capacity of an aluminium-timber beam.

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