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سازه 90 نرم افزار ترسیم نقشه سازه های بتن آرمه

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Evaluation of Design Parameters on PBD of RC Buildings with Masonry Infills.

Bhushan M. Raisinghani

ABSTRACT

Masonry infills are provided in almost all residential buildings as enclosure. The
building analysis and designs are carried out considering a representative
empirical time period. The yield strength of URM infilled frames is much higher,
and yield displacement is smaller for bare frames, providing higher ductility. The
extent of damage to infill elements define the hazard level imposed and the
corresponding risk associated with it. In this paper, the performance of RC building
with infills is evaluated using pushover analysis for various seismic hazard levels
and loading patterns as per ATC40 & FEMA356 in ETABS. A seven storey regular
RC building is located in seismic zone-V (IS1893-0.36 g). The parameters of
evaluation include time period formula, modelling technique of infill, masonry units
used in practice, and location of openings in building. The code provisions for open
ground storey buildings have been evaluated for performance assessment. Under
0.36 g hazard level, the building frame satisfied Life Safety performance objective
under the three lateral loading patterns. It is found that AAC masonry blocks
least affect the performance of frame elements and also the required failure mode for
the structure.

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    • توسط admin
      The Complete ETABS Professional- For Structural Engineers (based on IS code) 2019 Udemy
      دوره 20 ساعته آموزش ایتبز، سازه های صنعتی، سازه بلند بر اساس آیین نامه های هند
      Description
      1. For Moderate/Expert Users
      There are three types of Analysis covered in this Tutorial Series.
      1. Linear Static Analysis.
      2. Non-Linear Static Analysis (Pushover Analysis)
      3. Linear Dynamic Analysis (Response Spectrum Analysis)
      The design codes covered are American and Indian Standards with Introduction to European Standards.
      Case study 1 - Design of Pre-Engineered Building Steel Structure as per Indian Standards.
      Steel Structures especially PEB are somewhat tricky to model, analyze and design. Majority of the people are comfortable in RCC Design, but very few are expert in Steel Design. After covering this section , you will be able to calculate wind and seismic loads as per the Indian Standards , Model the Steel Structures i.e. Portal , Plan Bracing and Elevation Bracing, Analyze , Review the Modal Shapes and Design the Structure. Instructor will also teach you how to do the value engineering and optimize the Steel Structures. At the end of this lecture series , you will be comfortable with Steel Structures.
      Case study 2- Linear Dynamic Analysis and Design of Bill Board Steel Structure as per Indian Standards.
      Bill Boards are supported on the very large Cantilever Steel Structures. You will learn how to plan the basic Structural System, which can resist the high wind and high seismic loads. You will learn how to do the dynamic analysis of the Steel Structure. Modal Analysis is a very important part. You will also learn how to improve the Mode Shapes , how to check the Fundamental Time Period. At the end , you will be able to understand how to design the Steel Structure. Value Engineering and Optimization is also taught in the end. Instability also become an integral part of ETABS modellers. You will learn how to remove the Instabilities.
      Case study 3- Linear Dynamic Analysis and Design of Industrial Heavy Steel Structure as per American Standards
      Industrial Heavy Structures looks very difficult and confusing in the beginning. They may be a nightmare in the beginning for Novice Engineers, but in this lecture series , you will learn how to do the basic Steel Structure Planning, How to Plan the Plan and Elevation Bracing. You will learn what are the basic Mode Shapes for Industrial Heavy Structures. You shall also learn how you can do the Dynamic Analysis of the Structures. In the end , you will learn how to design the Steel Structures as per AISC 360. A separate lecture is given at the end for Connection and Base Plate Design.
      Case study 4- Linear Dynamic Analysis and Design of Steel Space Truss Structures for American Standards
      Space Truss Structures are very unique in the way how force travel in them. A big space truss is first taught how to model , then analyze and in the end design as per the American Standards. You will learn more about the mode shapes of the huge structures. In the end , you will be comfortable with how the Steel Space Truss Structures can be Designed.
      Case study 5- Non-Linear Static Analysis or Pushover Analysis of the Structures
      In the last decade , much has been written on the push over analysis. How the push over analysis is superior to Static Push over Analysis , but very few people actually know how to do the push over analysis. Even experts in the Structural Engineering Field Shy away from this topic.
      In this lecture series , you will learn how to make the push over curve and find the Performance Point. What it really means to push the Structure up to a certain displacement. How the Response Spectrum Curve needs to be aligned with the Pushover Curve to find the Performance Point. In the end , you will be able to access the Performance of the Structure. Axial , Shear and Moment Hinges are explained with the help of slides.
      Case study 6- Linear Dynamic Analysis of 23 Story High Rise Structure as per Indian Standards
      In this lecture series , you will learn how to read the Architecture Drawings , How to Do the basic planning of the Structural Elements.
      The important widely asked questions that will get answered in this lecture series are
       
       
      1. What is the difference between flexible and rigid diaphragms and how to assign the diaphragms to the RCC Slab ?
      2. How to do P-Delta Analysis
      3. How to do the Scaling of the Response Spectrum values to the Static Earthquake Analysis Values.
      4. How to Read the ETABS Editor File ?
      5. How to Design the Shear Wall ?
      6. How to Export the reactions to SAFE and Design the Raft in SAFE ?
      These six questions are very important to understand for any Structural Engineer for designing any Structure in ETABS.

      2. For Intermediate/Novice Users, ETABS Basics Section is provided
      This Section is the very basic steps in Learning of ETABS software. Moderate or Expert users may skip this part or may refer to this part as a refresher Introduction. You may also refer to this part , in case , if you face any problem while completing Case Studies.
      You will start with the
      Absolute Basics Section- Instructor proceeds step by step through the process of drawing grids, defining stories, defining materials, defining section properties, drawing objects in the structural engineering models, defining loads, selecting load combinations with theoretical explanations and examples.
      You will learn the basics of Soil Structure Interaction and designing basic Raft Foundation. Completing this Part will make you clear about the difference between Thin shell, Thick shell and Membrane.
      You will also learn the Basics of Structural Dynamics. You will be familiar with the Mode Shapes, Mass Participation, Earthquake analysis, Time periods etc. You may understand that this is a section to refer in case , you are stuck with any case study.
      You need to understand that this is not an easy to do course. You may need to repeat the course content of over 20 Hours over and over again to understand the course content. This course is only intended for Serious Students. Much efforts has been done to provide the practical understanding of the Software , which is not available anywhere on the internet , hence costlier than other courses on this platform.

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    • توسط admin
      Comparison between non-linear dynamic and static seismic analysis of structures according to European and US provisions
       مقایسه تحلیل لرزه ای استاتیکی و دینامیکی غیر خطی بر مبنای آیین نامه اروپا و آمریکا
      Mehmed Causevic · Sasa Mitrovic
      Abstract Several procedures for non-linear static and dynamic analysis of structures have
      been developed in recent years. This paper discusses those procedures that have been implemented
      into the latest European and US seismic provisions: non-linear dynamic time-history
      analysis; N2 non-linear static method (Eurocode 8); non-linear static procedure NSP (FEMA
      356) and improved capacity spectrum method CSM (FEMA 440). The presented methods
      differ in respect to accuracy, simplicity, transparency and clarity of theoretical background.
      Non-linear static procedures were developed with the aim of overcoming the insufficiency
      and limitations of linear methods, whilst at the same time maintaining a relatively simple
      application. All procedures incorporate performance-based concepts paying more attention to
      damage control. Application of the presented procedures is illustrated by means of an example
      of an eight-storey reinforced concrete frame building. The results obtained by non-linear
      dynamic time-history analysis and non-linear static procedures are compared. It is concluded
      that these non-linear static procedures are sustainable for application. Additionally, this paper
      discusses a recommendation in the Eurocode 8/1 that the capacity curve should be determined
      by pushover analysis for values of the control displacement ranging between zero and 150%
      of the target displacement. Maximum top displacement of the analyzed structure obtained
      by using dynamic method with real time-history records corresponds to 145% of the target
      displacement obtained using the non-linear static N2 procedure.
      Keywords Non-linear dynamic analysis · Non-linear static methods ·
      Pushover analysis · N2, NSP and CSM methods
       

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    • توسط admin
      پاورپوینت : راهنمای انجام تحلیل پوش آور در SAP2000
      فایل پاورپوینت در 111 اسلاید
      به نقل از کانال  Hidden Content
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    • توسط admin
      طراحی لرزه ای سازه های بتن آرمه بر اساس عملکرد
      Performance Base Seismic Design of Concrete Structure
      گردآوری و تالیف : جواد قدرتی ینگجه
      مقاله فارسی در 43 صفحه

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    • توسط admin
      Seismic Behavior of Direct Displacement-based Designed Eccentrically Braced Frames

      A. Mohebkhah* , S. Farahani Department of Civil Engineering Faculty of Civil and Architectural Engineering, Malayer University, Malayer, Iran

       

      Direct Displacement-Based Design (DDBD) is a performance-based seismic design method that has been proposed and well developed over the past two decades to design RC frame structures, shear walls and bridges. In this method, an equivalent single-degree-of-freedom (SDOF) substitute structure is utilized to estimate seismic displacement demands of a multi-degree-of-freedom (MDOF) system. Although this method has been used to design the above mentioned structures, however, there is just one comprehensive DDBD method to design steel eccentrically braced frames (EBFs) in the literature. The purpose of this study is to investigate nonlinear seismic behavior of the DDB designed EBFs with short, intermediate and long link beams and estimate their seismic demands. To this end, twelve 3, 5, 9 and 12-story EBFs were designed using the proposed DDBD method. To simulate the nonlinear cyclic behavior of link beams, a macro-model proposed in the literature was adopted and validated with the available tests results. In order to describe material nonlinearity of the framing members in the macromodel, distributed plasticity fiber based model was used. After validating the FEM macro-modeling technique of link beams, seismic behavior of the 2D EBFs was investigated with nonlinear time-history analysis under a set of selected earthquake records using the structural analysis software OpenSees (ver. 2.4.0). The results showed that the DDB designed EBFs generally can reach their anticipated performance level.


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