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Nonlinear Finite Element Analysis on Shear Behaviors of High-Strength Reinforced Concrete Masonry Shear Wall

Author: ZhangXiuLiang
Tutor: ZhuYingJie
School: Qingdao Technological University
Course: Structural Engineering
Keywords: Reinforced concrete block masonry shear walls Compressive strength Nonlinear Finite Element Analysis Model Grout Rate
CLC: TU364
Type: Master's thesis
Year: 2009
Downloads: 29
Quote: 0
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Abstract


This article by compression testing of high strength concrete block masonry specimens to study the mechanical properties of high strength concrete small hollow block masonry; mainly include masonry failure characteristics, compressive strength, deformation properties, elastic modulus , Poisson's ratio, basic mechanical performance indicators are calculated. To study full-size high-strength concrete reinforced block masonry shear behavior, the paper first discusses the basic theory of the nonlinear finite element method for structural analysis, and the long arm reinforcement puzzle based on eight different structural measures block shear wall shear performance finite element analysis to study the main stress in the plane loads of different types of block wall, XY shear stress OPENING wall cracks and crack distribution order and various block wall overall distortion performance, compare the shear behavior of reinforced concrete block masonry grouted rate different the grouted concrete strength of the core columns and different hole size. Through the study, we draw the following conclusions: 1. Experimental results show that the coefficient of the first crack of the high-strength masonry cracking late, the masonry as the grouted rate increases, fill improve core strength grade of concrete cracking increasingly getting late, cracking coefficient distribution in the 0.70 to 0.80. 2 block masonry compressive strength and elastic modulus of the recommendations of formula to determine the value of Poisson's ratio, verified by the test results, the calculated values ??and the experimental values ??in good agreement, and safer. Finite element analysis results show that the larger the wall opening hole rate, the smaller the stiffness of the wall, the more prone to cracking; openings rate increases, the cross-section bending tensile stress (Z1 Z3 an increase of 64%), bending compressive stress (Z1 Z3 increase of 70%), as well as hole angle at stress (Z1 Z3 an increase of 56%) were significantly increased, causing the wall of the first batch of cracks appeared earlier. With the greater the rate of openings, cracks appear sooner, the initial crack position change. Open-hole rate of 27.1% of the wall of the hole angle diagonal cracks first formed, was 9.4% of the openings in the wall root formation of initial cracks. Wall shear carrying capacity to improve (H5 H1 increased by approximately 50%) increase in the limit displacement of the wall with the increased the grouted rate increases and grouted concrete strength grade, a significant increase (H5 H1 approximately 52%), to improve the overall ductility of the wall to avoid the cracks of the wall soon after the brittle failure, thereby enhancing the safety reserves of the wall.

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CLC: > Industrial Technology > Building Science > Building structure > The structure of the soil, brick, stone,bamboo,wood > The structure of the large brick block structure and a large wooden partition ( Wall )
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