Oct 14, 2014 the sap2000 program is one of the leading structural engineering software. You can analyze any structures in this program, and even design element by element precisely with the known regulations aci in eu, rcdf in mexico, eurocode europe, etc. Square the participation factor table and divide this value by total mass. This fully integrated product for the modeling, analysis and design of structures continues to be available in three levels. It is strongly recommended that you read this manual and work the tutorial before attempting a. You can add this mass to existing mass, replace existing mass, or delete existing. Interpreting the modal mass participating ratios table. Sap2000 download download latest sap2000 ultimate version for free. Objective the primary objective of this document is to make sure that etabs is used consistently by the structural engineers in atkins office in dubai in terms of.
Sap2000 tutorials hw 7 problem 1 by andrew chan example. Because, the participation of the substructure mass depends on the geometry of the isolated bridges and cannot be considered constant. Instructions may not be broken down into much details but it will still be a good reference for pp end users. Guidelines and tutorial for modeling haunched steelgirder bridges. Most of the dynamic methods in robot are based on modal analysis results. Why is modal participation ratio table not getting. An overview of the tuned mass damper and guidelines for modeling the device. Go into define load cases modal cases define modal case change the number of mode shapes you want to consider. She sent me the table below of the modal participating mass ratios extracted from etabs and asked whats wrong with her model. The theoretical background details and examples are included in the appendices. Start to start vs finish to finish relations in p6. This tutorial provides an introduction to the assignment of joint patterns.
The fixed mass participation ratio may be calculated as follows. Audience this tutorial is meant for readers new to erp terminology who want to learn how to develop business solutions for clients using the developer tools of sap r3. Modal participation factor and modal mass coefficient for. Aug 12, 2014 sap2000 is a program developed by the company csi, computer and structures, inc. Mini sap 2000 tutorial for an example beam hands on.
Because the default number of mode shapes entered in sap2000 are 12. Fue ass2fy50 modifysh01,v notes 41 72011 79211 10298. The innovative enhancements in this version are categorized below. Theoretical basis of methods used during structure dynamic.
Mehta gujarat state disaster management authority government of gujarat strength stiffness deformability h. The sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. Using sap2000 software package in earthquake engineering. How to increase the modal mass participation ratio. Effects of substructure mass participation on natural. For the love of physics walter lewin may 16, 2011 duration. It comes in several versions standard, plus and advanced. The sap2000 program is one of the leading structural engineering software. Unsubscribe from computers and structures, inc sign in to add this video to a playlist.
It is strongly recommended that you read this manual and work the tutorial before attempting a real project using sap2000. We will determine the reactions at point b and d in terms of the x and y components. Calculate mass in sap2000 computers and structures. A list of major topics covered in this stepbystep sap material is below. Mass participation factors cloche mechanical 10 jun 05 09. The earthquake analysis capabilities of sap2000 are demonstrated using a railroad bridge bent designed in accordance with the arema manual for railway engineering. These lessons allow you to learn and practice some of the basic skills used throughout sap, and each lesson includes. This document contains stepbystep set of instructions with screenshots for the most commonly used sap production planning processes. Sap2000 is a general purpose finite element program which performs the static. Sap2000 follows in the same tradition featuring a very sophisticated, intuitive and versatile user interface powered by an unmatched. G other properties for steel material minimum yield stress. Effects of substructure mass participation on natural period.
It expounds the main ideas realized in this program. My doubt is that modal mass coefficient and participation factor as per atc 40 are unitless values. Sap2000 will do the stress checks automatically when a member is designed. Obtain the design seismic force in the xdirection by the dynamic analysis method outlined in cl. Jun 08, 2011 unsubscribe from computers and structures, inc sign in to add this video to a playlist. This tutorial will also introduce you to basic concepts. Be careful in defining the weight per unit volume for the materials. Pdf response spectrum analysis for irregular multistorey. But to generate table with mass participation ratio, the system shows processing symbol and remains so for long time. Sap2000, etabs and perform 3d, to undertake numerical. Elaboration of an optimization process based on structural rules and design constraints for a rc shear wallslab system. Modal characteristics modal amplitude, mass participation ratio 9. Conditions is analysed with the codes plaxis 3d and sap2000. The fixedmass participation ratio may be calculated as follows.
Introduction this document presents the description of the dynamic analysis methods applied in robot. Why does sap2000 divide the responses of structures into 12. Sap2000 tutorials hw 7 problem 1 by andrew chan brief. Note that when the eccentricities areoverridden, an actual distance from the center of mass of the rigid diaphragm, not a ratio, must be input.
Time history analysis in sap2000 structural analysis. It contains important information that may be more current than what is in the manuals. After analysis is run, check joint mass by selecting display show tables analysis results joint output. Mass per unit volume isotropic property dat modulus of elasticity.
Fu and hamed alayed, university of maryland abstract nonlinear static pushover procedure is specified in the guidelines for seismic rehabilitation of buildings. This section is not instructional and is not aimed at detailing the robot interface. Sap2000 advanced 1 view define claect model 2 flames selected oran select assign analyze disalay 0esi,arl qotions heb frame sections. Sap2000 training manual civil engineering community. You may have some instabilities in your model local modes such as cantilever vibrations, extremely flexible beams that are causing small modal mass participation, but still using up the overall modes in your analysis. Why does sap2000 divide the responses of structures into. Print and download sap reports tailor your sap user settings lessons this selfstudy is divided into nine lessons, each focusing on a particular skill or function.
Lin ear and non lin ear static and dy namic anal y sis and. Automatic structural design of rc wallslab buildings. Modal participation factor and modal mass coefficient for the first natural mode in sap 2000 shz7 structural 6 jun 17 02. Dynamics check modal participating mass ratios youtube. Start up screen of sap2000, select working unit to be tonm. Seismic analysis of bridges using displacementbased approach by chung c. Latest sap2000 download civil engineering community.
Tech tip determine the number of modes for linear dynamic using mass participation. Department of civil and environmental engineering california. Jan 15, 2017 see more of civilax civil engineering community on facebook. To save a document as pdf with the java interface or rich client. No matter what i do, tha mass participation ratio reaches a certain percentage 56% and stops increasing.
Development of a genetic algorithm for automatic generation of optimal structures from architectural ifc models. Modal mass coefficient and modal participation factor in. Threedimensional static and dynamic analysis of structures a physical approachwith emphasis on earthquake engineering edward l. When the eccentricities have been overridden, the eccentric moment is calculated as the specified eccentricity distance times the total lateral force appliedto the diaphragm. And the software will limit it to that many number of modal r. See more of civilax civil engineering community on facebook. Mass technical knowledge base computers and structures. Take a look at the modal mass participating ratios to see if you have a lot of modes with low modal mass. One dof considers only the superstructure mass and the other dof considers only the participation mass of the piers. Department of civil and environmental engineering california polytechnic state university san luis obispo, ca 93407 1999 by rakesh k. Sap2000 watch and learn video tutorials cover a wide range of topics, from basic product overviews to advanced subjects such as nonlinear sequential construction. Of structural elements response in plaxis 3d sap2000.
Before doing some modifications, the mass participation would reach 90 % from the 2nd mode. Why is modal participation ratio table not getting generated. Start up screen of sap2000, select working unit to be tonm at dropdown menu. The total mass in sap2000 could be obtained defining a load case without any loads and with a self weight multiplier of 1. New features for sap2000 version 18 sap2000 v18 is a major new release, and significant new features have been added or enhanced. This tutorial is intended to give you an understanding of how to analyze a problem in statics with sap2000. Why is modal participation ratio table not getting generated in sap2000.
Modal analysis mass participation autodesk community. Sap2000 watch and learn sap2000 tutorial videos sap2000 tutorial pdf sap2000 tutorial example sap2000 tutorial 3d frame sap2000 tutorial. Some concepts in earthquake behaviour of buildings c. Sap r3 i about the tutorial this tutorial provides a basic understanding of one of the bestselling erp packages in the world that is known as sap r3. If time permitted, it would have been better to repeat the experiment several times to be sure that a damping ratio of 0. If you included a z distributed load in a particular load case, say equipment load case for example, defining the mass source gives you the option to convert a factored load for the equipment load case, or live load case into mass. Sap2000 is the latest and most powerful version of the wellknown sap series of structural analysis programs. The third part of this volume, the sap2000 introductory tutorial manual, is intended to provide firsttime users with handson experience using the modeling, analysis and design features of sap2000. Goel department of civil and environmental engineering california polytechnic state university san luis obispo, ca 93407. The total weight is written in one of the output files. The displacements of joints, axial forces, time period and mass participating factors were studied.
About this manual this manual describes the basic and most commonly used modeling and analysis features offered by the sap2000 structural analysis program. Now lets elaborate whats wrong, the seemingly wrong and the nothing. Seismic analysis of bridges using displacementbased approach. Mini sap 2000 tutorial for an example beam hands on exercise. Export the joint masses table to excel by selecting analysis results joint output joint masses. Pdf response spectrum analysis for irregular multi. Sap2000 is a program developed by the company csi, computer and structures, inc. As you said in sap2000 display tables, it gives the participation factors which is true but it. Miscellaneous incidents resolved incident description.
945 228 1505 801 260 305 568 831 408 66 1409 1338 1262 222 528 103 1138 1012 674 618 1512 555 848 945 1372 53 983 980 632 790 67