Showing papers on "Shear wall published in 1970"
TL;DR: In this paper, a more complete three-dimensional continuous method for structures comprising simple or coupled, prismatic or non-prismatic, shear walls and frames arranged asymmetrically in the floor plane is presented.
Abstract: The object of the present paper is to provide a more complete three-dimensional continuous method for structures comprising simple or coupled, prismatic or nonprismatic, shear walls and frames arranged asymmetrically in the floor plane. The unknowns of the problem are three continuous functions of horizontal displacements; two for the translations parallel to the structure axes, and one for the angle of twist. These functions are derived from a system of three third-degree nonhomogeneous differential equations with constant coefficients. The homogeneous part of the solution relates to an eigenvalue problem of a third-degree matrix, involving nine arbitrary constants obtainable from the boundary conditions. The particular solution depends on the type of loading; a uniform lateral load yields a second-order polynomial and a trapezoidal load yields a third-order one. With the three functions known the three displacement functions for each of the stiffening elements and elastic media can be calculated and the internal forces established. The present method is applicable to structures with nonuniform geometric properties by dividing them into uniform zones, solving for each zone separately, and determining the relevant constants from interzone boundary conditions.
25 citations
TL;DR: A review of the suitability of prestressed concrete for earthquake resistance can be found in this article, where the authors discuss such fundamental properties as stiffness, damping, energy absorption and dissipation, and ductility, all of which will affect the response and hence the structural behaviour of a building under earthquake loading.
Abstract: The use of prestressed concrete components has been accepted for many years for structures under gravity loading. The applications of the material are increasing rapidly, encouraged by such advantages as the possibility of pleasing architectural forms, and the suitability of prestressed concrete to modern prefabricated construction. However the use of prestressed concrete in primary seismic resistant elements such as shear walls and frames has created considerable controversy. This review is a historical trace of the approach of design and research engineers to the suitability or otherwise of prestressed concrete for earthquake resistance. It discusses such fundamental properties as stiffness, damping, energy absorption and dissipation, and ductility, all of which will affect the response and hence the structural behaviour of prestressed concrete buildings under earthquake loading.
10 citations
TL;DR: In this article, a simplified analysis of a symmetrical coupled shear wall of variable cross-section is presented, which yields a series of linear simultaneous equations for the determination of the constants of integration with which all internal forces and displacements are readily obtained.
9 citations
01 Dec 1970
3 citations
TL;DR: In this article, the authors used the SWALLO algorithm to predict the stress distributions in multi-storey shear walls by automatically dividing the wall into triangular elements and representing each pile as a horizontal and vertical spring.
2 citations
TL;DR: In this article, the effects of loading rate on reinforced concrete shear walls and rebars were investigated, and the regression curves of the yield strength of large-size rebars accounting for effects of both strain rate and temperature were proposed based on the test results.
Abstract: The objectives of this study are to experimentally investigate the effects of loading rate on reinforced concrete shear walls, and to propose material constitutive laws of concrete and rebars accounting for the effects of loading rate. Part 1 of this study shows the results of high speed tensile loading tests of largesize deformed rebars of 38 mm and 51 mm in diameter with the temperature of test specimens varied. The loading speeds were varied from 0.01 cm/s (static) to 200 cm/s. The temperature of the specimens was set to -20°C, 20°C and 60°C, respectively. The regression curves of the yield strength of large-size rebars accounting for effects of both strain rate and temperature are proposed based on the test results.
2 citations
2 citations
TL;DR: In this paper, the effects of loading rate on the shear strength-deformation relationships of RC shear walls were investigated, and a FE simulation method was proposed to analyze the relationship between loading rate and shear strain.
Abstract: The objectives of Part 3 of this study are to experimentally investigate the effects of loading rate on the shear strength-deformation relationships of RC shear walls, and to propose a FE simulation method. Lateral high speed loading were applied to the 1/10 scale wall specimens with the loading rate varied from static level up to 1.0 m/s. The tests results showed that as the loading rate increases, not only the shear strength but also the shear strain at the maximum shear strength of specimens increase. Results of FE simulation analyses were also presented, accounting for dynamic properties of both concrete and rebars.
Dissertation•
01 Nov 1970
01 Jul 1970
TL;DR: In this article, the influence of the type of masonry construction of traditional buildings on the dynamic behavior of old buildings with masonry walls is the subject of this work, which is an important step to estimate the behavior of the structure due to earthquake loading.
Abstract: The influence of the type of masonry construction of traditional buildings on the dynamic behavior of old buildings with masonry walls is the subject of this work. Comparison of the eigenmodes, periods and the participation factors for each mode, permits us to find the relation between the type of masonry and the dynamic, response spectrum analysis. This is an important step to estimate the behavior of the structure due to earthquake loading. The strengthening methods which were examined consist of three basic types of masonry construction and are: reinforced concrete slabs, reinforced concrete tie-beams and reinforced concrete tie-columns. The influence of the plan geometry and the existence of internal shear wall is also examined.
DOI•
01 Jan 1970
TL;DR: In this paper, the Dynamic Strain Pick-Up (DSP) technique is used to pick up the strain in a Coupled Shear Wall (CWS) with the purpose of measuring stress levels.
Abstract: I ACKNOWLEDGMENTS III TABLE OF CONTENTS IV REFERENCES XIII CHAPTER ONE INTRODUCTION 1 . 1 Preliminary 1 1,2 Shear ~all Design 3 1.3 Verification of the Mathematical Analysis Techniques Applied to Coupled Shear Walls 6 1 ,4 The Purpose of the Ensuing Work 6 1.4,1 The Finite Element Analysis 9 1,4"2 The Photoelastic Study 9 1. 4,, 3 The Prototype Test 10 1,5 Shear Wall Description and Terminology 11 1,6 The Frame/Shear Wall Interaction 11 1.7 The Prototype Stress Levels 12 1,8 The Presentation of the Results 12 CHAPTER TWO = SECTION ONE EXPERIMENTAL DEVELOPMENT DEVELOPMENT OF THE DYNAMIC STRAIN P ICK=UP 2. L 1 2, 1 • 2 2 0 1 • 3 2, 1,4 2 < 1 • 5 2. 106 2, 1 ,, 7 2 • 1 O• 8 Introduction The Principle of the Dynamic Strain Pick-Up The Displacement Transducer The Instrument Magnification Factor The First Dynamic Strain Pick=Up The Second Dynamic Strain Pick=Up The Third Dynamic Strain Pick=Up The Fully Developed Dynamic Strain Pick=Up 2.1"8.1 The Final Design 2.1 ,802 The Suction Holding Device 14 15 1 7 1 7 1 7 19 22 24 24 27 Page 2. 1.8,3 The Trial Instrument 29 2" 1.8.4 The Construction of the Displacement Transducers 30 2. 1.8.5 The Stiffness of the Transducers 33 2~1.806 Assembly of the Transducers 33 2. 1.8.7 The Instrument Body Covers 35 2. 1.8.8 Semiconductor Strain Gauge Failure 36 2.1~9 The Instrument Calibration Devices 36 2. 1.9.1 Preliminary 36 2Ql.9.2 The Static Strain Calibration Beam 36 2. 1.9.3 The Dynamic Strain Calibration Beam 37 SECTION TWO ELECTRONIC DEVELOPMENT 2,2 4