Short-pier Shear Wall Research Articles

Experimental Study on a New Reinforcement Method for Multilayer Industrial Building’s Vibration

In order to study a new reinforcement method for multilayer (4 layers) industrial building’s vibration, firstly, a new reinforcement method using a short‐pier shear wall was put forward. Secondly, an engineering example of a multilayer industrial building with abnormal vibration was introduced. A three‐dimensional finite element model of multilayer industrial building was established, and field vibration test was carried out. Test results showed that abnormal vibration of industrial building was caused by resonance between machines and multilayer industrial building. Finally, multilayer industrial building was reinforced by a new reinforcement method, and vibration experiment was carried out after reinforcement. The results show that the new reinforcement method has a good reinforcement effect. Strength and stiffness of multilayer industrial building were obviously improved, and natural frequency of industrial building in the length direction increased from 2.45 Hz to 5.87 Hz, natural frequency of industrial building in the width direction increased from 2.94 Hz to 7.83 Hz, frequencies of machines and frequencies of multilayer industrial building were not in resonance range, acceleration and velocity vibration characteristics of multilayer industrial building were improved, which can provide reference for the reinforcement of multilayer industrial building with a similar structural configuration.

Restoring Force Model Investigation of Short Pier Shear Wall

To study the seismic behavior of short pier shear wall, 6 short pier shear wall specimens are tested under low cyclic loading with axial load ratio of 0.2. Hysteretic rules and stiffness degradation rate are determined base on test results and feature points are defined by theory, restoring force model that considers the effect of two loading direction to hysteretic characteristics is proposed based on test research, which could be applied to the nonlinear dynamic analysis of the structure.

Study on Seismic Behavior of the L-Shape Steel Reinforced Concrete Short-Pier Shear Wall with Different Concrete Strength

In order to discuss the effect of different concrete strength on the seismic behavior of the L-shape steel reinforced concrete (SRC) short-pier shear wall , this article analyze three L-shape steel reinforced concrete short-pier shear walls of different concrete strength with the numerical simulation software ABAQUS, revealing the effects of concrete strength on the walls seismic behavior. The results of the study show that the concrete strength obviously influence the seismic performance. With the concrete strength grade rise, the bearing capacity of the shear wall becomes large, the ductility becomes low, the pinch shrinkage effect of the hysteresis loop becomes more obvious.

Research Status and Development Application of Ceramsite Concrete Short Pier Shear Wall

Currently our country high-rise construction technology develops forward an important content to reduce the structure dead weight. The ceramsite concrete which makes full use of industry waste material obtains the good social efficiency and helps to reduce the structure dead weight effectively. At the same time, it has the good heat preservation performance as well as the fire protection performance. The short pier shear wall comes by the general shear wall development. It has absorbed irregular cross-section column structure’s merits. It is also easy to satisfy each kind of building plane request. Moreover, it has the lighter weight, saves the material and decreases earthquake function contrast to the general shear wall.

The Study on the Effects of Different Forms of Steel on Seismic Performance of Steel Reinforced High-Strength Concrete L-Shape Short Pier Shear Wall

In order to discuss how the different forms of steel impact on seismic behavior of steel reinforced high-strength concrete(SRHC) L-shape short-pier shear wall, four different steel forms SRHC L-shaped section short-pier shear wall members with low reversed cyclic loading were simulated by ABAQUS. The four steel forms were steel bar, solid-web steel, truss-type steel and hole-type steel. The result show that: different steel forms can significantly impact on the seismic performance of SRHC L-shaped section short-pier shear walls and the seismic capacity range from high to low as follow: with solid-web steel, with hole-type steel, with truss-type steel and reinforced.

Nonlinear Analysis of I-Shaped Short Pier Shear Wall with Concealed Bracings

In this paper, research on I-shaped short pier shear wall model which is the relatively weak seismic system components is presented. According to the results of Finite element software ABAQUS simulation, the influence of the bearing capacity, ductility and skeleton curve behavior on the I-shaped short pier shear wall with concealed bracings is mainly studied under different axial compression ratio and different reinforcement proportion of the concealed bracings. The results indicate that the I-shaped short pier shear wall with concealed bracings has a higher carrying capacity, and the ductility has also been enhanced. And the factor that axial compression ratio, reinforcement proportion of the concealed bracings significantly affect the seismic behavior of the I-shaped short pier shear wall with concealed bracings

Experimental Study on Normal-Section Bearing Capacity of Steel Reinforced High-Strength Concrete L-Shape Short Pier Shear Wall

Based on the experimental study of normal-section bearing capacity of four steel reinforced high-strength concrete (SRHC) L-shape short pier shear walls with two-way eccentric compressive load, this thesis discussed the failure pattern and working mechanism and get some general laws about normal-section baring capacity of this kind of specimens. The research results show that: the failure pattern of SRHC L-shape short pier shear wall with two-way eccentric compressive load is classified into two types-large eccentric compression and small eccentric compression; the sectional strain basically fit the plane-section assumption; steel and concrete can practically work cooperatively until the specimens are damaged and the steel of compressive region yielded; the normal section baring properties of the perforated frame member and the trussed frame member were fairly close to each other and the trussed frame has no advantage compared with the perforated one.

Experimental Study on Normal-Section Bearing Capacity of Steel Reinforced High-Strength Concrete L-Shape Short Pier Shear Wall

Based on the experimental study of normal-section bearing capacity of four steel reinforced high-strength concrete (SRHC) L-shape short pier shear walls with two-way eccentric compressive load, this thesis discussed the failure pattern and working mechanism and get some general laws about normal-section baring capacity of this kind of specimens. The research results show that: the failure pattern of SRHC L-shape short pier shear wall with two-way eccentric compressive load is classified into two types-large eccentric compression and small eccentric compression; the sectional strain basically fit the plane-section assumption; steel and concrete can practically work cooperatively until the specimens are damaged and the steel of compressive region yielded; the normal section baring properties of the perforated frame member and the trussed frame member were fairly close to each other and the trussed frame has no advantage compared with the perforated one.

Elastic Performances of Short Pier Shear Wall Subjected to Lateral Loading

The formulas to define the minimum ratio of length-to-thickness of the pier cross section of short-pier shear wall is presented, by which the short pier shear wall is distinguished from the irregular cross-section column frame numerically. According to the results of finite element analysis of typical short-pier shear walls, the elastic mechanical performances of them were investigated. Conclusions were achieved that the flange width hardly influence on the moment of piers but significantly influence on the magnitude of stresses in the horizontal section and the top displacements of walls; the deflection curve of short-pier shear wall is flexural-shearing type, equations and diagrams to define the position of the contra-flexural point in the curve are provided.

Experimental Research on the Seismic Behavior of the SRC Short-Pier Shear Wall with Layered Braces Structures

A new type of construction employing shaped steels as boundary elements and layered braces of RC(Reinforced Concrete) short-pier shear wall is put forward. The braces are in X shape and are erected in a multi-storied form. They are embedded in the boundary zone and the web of SRC (Steel Reinforced Concrete) short-pier shear wall respectively to make it possible to improve the bearing capacity and ductility of this shear wall and to improve its seismic performance. Three half-scale specimens of the SRC short-pier shear wall are tested under reversed cyclic loading. High design axial load radio of 0.5 is used. The failure processes and modes of the specimens are observed. The law about bearing capacity and displacement ductility of the specimens influenced by the layered braces structures is revealed. The experimental results show that the displacement ductility is closely related to the amount of stories of braces. The specimens with layered braces structures have better ductility and larger bearing capacity, and therefore the layered braces structures effectively improve the seismic performance of the SRC short-pier shear wall.

Several Written Instructions of the Technical Regulation of Shot-Pier Shear Wall Structure Key Figures Construction

As a new type of resist lateral force structure, short-pier shear wall structure has been widely used in high-rise and super-tall residential construction. However, at present, there isn’t a specifically targeted short-leg walls structure design and construction technical regulations both at home and abroad, which led to the architectural engineering design and construction market turmoil. By the prophase research of the short-leg walls structure seismic performance, and a great deal of experiments, combine with the latest research results at home and abroad, adopt the limit state design method based on probability theory, the paper clarifies the definition of short-leg walls, and analyzes the calculation method of section load-carrying capacity for earthquake combination and no-earthquake combination, which has certain directive significance and engineering application for the design and construction of high-rise residential buildings.

Short Shear Wall Structure Conception Design on High Building

Short-pier shear wall structure design in a high building was introduced in this paper, the author explored how to dispose various styles short-pier shear wall structure, the author expound practical application of conception design in short-pier shear wall structure design.

Study on Design Method of SRC Abnormal Exterior Joint of Large-scale Thermal Power Plant Frame-bent Structure

Due to the demand of manufacture technology, the main factory building forms intricate frame-bent structure, many abnormal joints with strong beam-weak column and changed beam and changed column. The bearing mechanism of abnormal joints is very complex, and design of those joints becomes the hard point in the design of large-scale thermal power plant. In order to improve seismic behavior of the thermal power plant frame-bent structure, the research group put forward SRC frame-RC dispersive short-pier shear walls mixed structure, and carried out SRC frame-dent structure sub-space model test. Based on the sub-space model test, the paper chose four typical SRC abnormal exterior joints to take the experimental research. Through the pseudo-static test of the joints, this paper mainly analyses the force-transmission path and bearing mechanism of the SRC abnormal exterior joints, and studies on the main factors which affect the shear capacity of joint. Besides, it puts forward some detailing requirements. Those may be references for practical design.

Shaking Table Experimental Study of the Short Pier RC Shear Wall Structures with Concealed Bracing

Short pier RC shear wall structure with concealed bracings is put forward in this paper. Two 1/6 scale models of short pier RC shear wall structure with and without concealed bracings are tested on shaking table. Dynamic properties and responses of the two structures at different stages are studied, and the comparison of failure modes between the two models is also made. Results from the experiments indicate that at elastic stage, seismic performance of short pier shear wall structure with concealed bracing is similar to that of structure without concealed bracing. After concrete cracks appearing, the seismic performance of the former is much better than that of the latter. The displacement responses of the former are much smaller than that of the latter, and the cracks distribution areas in walls of the former is much wider than that of the latter. The energy dissipation capacity of the former is significantly improved compared with that of the latter. Nonlinear time history analysis is carried out and the calculating results agree well with the results from the experiments.

Seismic Performance of RC Coupled Short-Pier Shear Walls with Concealed Bracing

The RC short-pier shear wall structure is a new type of structural system in tall residential buildings. It has been applied in many buildings in China, but its seismic performance is worse than that of normal shear wall structures. Therefore, how to improve its seismic performance becomes a problem which has been paid much attention by engineers. In this paper, the seismic performance of short-pier shear walls with concealed bracing is investigated. An experimental study of four 1:3 scale coupled short-pier shear wall specimens has been carried out, two of which were normal coupled short-pier shear walls, and the other two coupled short-pier shear walls with concealed bracing. Based upon the experimental study, the effects of concealed bracing on the load-carrying capacity, stiffness, ductility, hysteretic behavior, energy dissipation and failure mechanism of shear wall are discussed. It is shown that the seismic performance of short-pier shear walls is greatly improved by concealed bracing. Finally, mechanical models for calculating the load-carrying capacity of the shear wall are proposed, and the theoretical results agree well with those from experiments.