Outline

  • Abstract
  • Keywords
  • 1. Introduction
  • 2. an Introduction to Jk Wall
  • 3. Experimental Investigation
  • 3.1. Test Units
  • 3.2. Material Properties
  • 3.2.1. Eps Concrete
  • 3.2.2. Jk Panel, Jk Stiffener and Steel Rebar
  • 3.3. Test Setup
  • 4. Experimental Results
  • 4.1. General Observations
  • 4.2. Ductility
  • 4.3. Energy Dissipation
  • 4.4. Effect of Gravity Load
  • 4.5. Stiffness and Strength Degradation
  • 5. Modeling
  • 5.1. Simulation Using Abaqus – a Verified Model
  • 5.2. Equivalent Reinforcement for Jk Panel
  • 5.3. Simulation Using Idarc – a Calibrated Model
  • 5.4. System Level Simulation
  • 6. Design Considerations
  • 6.1. Performance-Based Design
  • 6.2. Development Length
  • 7. Conclusions
  • 7.1. Eps Concrete
  • 7.2. Jk Wall
  • 7.3. Jk System
  • Acknowledgement
  • References

رئوس مطالب

  • چکیده
  • 1. مقدمه
  • 2. معرفی دیوار JK
  • 3. بررسی تجربی
  • 1.3 واحد آزمون
  • 2.3 ویژگی و مشخصه های مصالح
  • 1.2.3 بتون EPS
  • 2.2.3 پانل JK، سفت کننده ی JK و میله گرد فولادی
  • 3.3 انجام آزمون
  • 4.نتایج تجربی
  • 1.4: مشاهدات کلی
  • 2.4 قابلیت کشش
  • 3.4 اتلاف انرژی
  • 4.4 تاثیر بار گرانشی
  • 5.4 کاهش میزان سختی و قدرت
  • 5.مدل سازی
  • 1.5 انجام شبیه سازی با استفاده از Abaqus- یک مدل تاییدی
  • 2.5 تقویت کننده های برابر برای پانل JK
  • 3.5 شبیه سازی با استفاده از IDARC- یک مدل درجه بندی شده (کالیبره)
  • 4.5 شبیه سازی تراز سیستم
  • 6. موارد قابل رسیدگی در طراحی
  • 1.6 طراحی های عملکردی
  • 2.6 طول افزایش یافته
  • 7.نتیجه گیری

Abstract

This study introduces a new emerging structural system, called JK system, which uses JK walls as its main structural elements. JK wall, first proposed by Joseph Kiefer, is a kind of shear wall constructed with low-strength/super-lightweight Expanded Polystyrene (EPS) concrete and reinforced by JK panel, JK stiffener and some additional steel rebars. The study experimentally examines behavior of three JK wall specimens with different reinforcement and level of gravity loads under quasi-static cyclic loading. Obtained results indicate that JK walls can sustain large ductility demands accompanied by stable hysteresis loops. All specimens are also numerically investigated in order to obtain a reliable analytical tool. In this paper, it is shown that a low-strength concrete, currently recognized as a nonstructural material, can be used as a structural concrete having a satisfactory behavior. Finally, a seven story building with JK system is considered to numerically study the above claim. However, more studies are still required to fully capture all short and long term features of structural EPS concrete elements.

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