Disaster Resistant Design and Seismic Strengthening of Buildings Workshop on Preparedness and Mitigation for Earthquake Vulnerability in major cities of India7th-8th July, AhmedabadAlpa Sheth, Seismic ConsultantVMS Consulting Engineers

Background26 January 2001 earthquake exposed serious flaws in man-made constructionsProblems at all levels: Lack of competence (knowledge)Lack of motivation for proper engineering and constructionLack of awareness about codes and seismic requirementsLack of monitoring mechanismLack of punitive measuresA classical example of systems failure

StakeholdersBuilderGovernmentContractorStructural engineerConstruction engineerArchitectMunicipalities, Development Authorities.MasonsPublic

Why is seismic engineering not widespread?

Not taught in engineering colleges Pace of change. First strong ground motion recorded was only recorded in the 1930s. Seismic codes of the 60s, rather simplistic. Rapid pace of research and availability of computers have added tremendous sophistication to the subject. All this has happened in just one life time!!!!Few working engineers outside Universities with the time or inclination to keep up to date.Cannot be practised as from a recipe book as complex concepts and mathematics involved.

Why is seismic engineering not widespread? Seismic Engineering very different from regular structural designIn regular structural engineering design such as for gravity and wind, Check the stresses in members and determine acceptability by a basic criterion such as actual stress < permissible stress. Not so straightforward in seismic design!! In earthquakes, structures designed for only a fraction (fifth to a tenth) of the seismic forces they can be actually subjected to. To ensure safety, the structure is to be specially detailed for ductility so that the structure can undergo large deformations without total collapse.

In dealing with earthquakes, we must accept the probability that failures will occur in the near future otherwise all the wealth of the world will prove insufficient to fulfill our needs: the most modest structures would be fortresses. We must face uncertainty on a large scale for it is our task to design engineering systems about whose properties we know little - to resist future earthquakes and tidal waves - about whose characteristics we know even less (1971)- W. Housner

The seismic engineer is concerned not so often with preventing minor damage in moderate and severe earthquakes as he is with preventing total collapse so as to protect life. This means that for design of structures, there is a wide choice of design acceptance criteria, all with implications for damage and loss vs cost. PERFORMANCE BASED DESIGNGetting to be very popular in developed countries

Competency Building at Education level Earthquake Engineering Education in Colleges Training of Teachers to teach earthquake engineering Competence Building in Practice of Seismic Engineering Training of Practising Engineers Training of Government Engineers Mason Training and Certification C. Awareness of Codes and Seismic Requirements Review Earthquake codes Home-Owners Guide to Earthquake SafetySmall Buildings CodeD. Monitoring MechanismsComprehensive Review of Drawings by Municipal Authorities for earthquake code complianceLicensing of structural engineers through competency testsCapacity Building in Seismic Engineering

Workshops held with all universities and Polytechnic Cell of Gujarat to discuss introduction of earthquake engineering education. Based on consensus report of the workshops, it was decided to change the syllabus to incorporate earthquake engineering. Detailed study was undertaken to ensure that students were not overburdened- meant overhauling of obsolete topics.Curricula formulated for all the programs for seismic engineering for Degree, Diploma and Masters level programs again through workshops and discussions. GoG issued a GR to change syllabus in civil engineering colleges accordingly in Polytechnic Colleges, Degree & Post-Graduate Colleges Capacity Building at Education level -Earthquake Engineering Education in Colleges Development and Implementation of Revised Curriculum in Engineering Colleges

Curriculum changes already implemented in all engineering colleges and polytechnics in Gujarat. Follow-up workshop with colleges for continuing support. Collaborative process. Hand-holding of colleges through the process of change. Capacity Building at Education level -Earthquake Engineering Education in Colleges Development and Implementation of Revised Curriculum in Engineering Colleges Contd

Capacity Building at Education level Gujarat Teacher Training Program Short Term CoursesTraining Teachers to teach new earthquake engineering syllabus and build a force of earthquake engineering experts in stateTeachers Training13 courses of one week each for engineering teachers almost equivalent to a full semester program in earthquake engineering Courses to be offered twice each for convenience of facultyCourses go online from July 2003 and to end by March 2004About 80-120 engineering faculty of Gujarat degree and polytechnic colleges to be covered under this training program

Teachers to be deputed for intensive 19 week program to IIT Kanpur. Courses to be covered, course content finalised and will be covered under the NPEEE scheme. Date of commencement- July 2003 Teacher Training ContdCapacity Building at Education level Gujarat Teacher Training Program Medium Term Courses

Capacity Building of State of Practice- Training Programs for Practising Engineers of GujaratEngineers TrainingHigh demand for coursesCourses preferably on weekends. Courses free of charge or nominal fees.Courses on IS earthquake codes- Rationale of codes and design examples and on Seismic Detailing and Design of Concrete and Masonry Structures very popular. Two-day workshop on new seismic code IS 1893-2002 conducted in March 2003 -More than 100 participants attended!!One day workshop on Seismic Detailing Code IS 13920-1993 organised in Ahmedabad on July 6, 2003. 65 participants; 26 from Rajkot, Surat and Baroda

Additional Courses on Masonry Design and Steel Design in Seismic Regions in next 3 months Preparation of 10 courses on seismic engineering covering all aspects of seismic engineering from seismology to foundation problems in earthquakes Students, Practising Engineers, Teaching Faculty can obtain copies of these on CDs from GSDMA for self-paced learningCapacity Building of State of Practice- Training Programs for Practising Engineers of Gujarat

SEISMIC ENGINEERING COURSE MODULES

SEISMIC ENGINEERING COURSE -III

MODULE:

SEISMIC ACCEPTANCE CRITERIA

SEISMIC ENGINEERING COURSE -II

MODULE:

CONCEPTS OF EARTHQUAKE DESIGN AND RELATIONSHIP TO STRUCTURAL FORM

SEISMIC ENGINEERING COURSE -I

MODULE: INTRODUCTION

SEISMIC ENGINEERING COURSE IV

MODULE:

APPROXIMATE METHODS FORCALCULATING NATURAL FREQUENCY

Capacity Building of State of Practice- Training Programs for Government Engineers Capacity building of Government engineers greatly enhanced and expedited by having tailored courses for them in seismic engineering from expert facultyAttendance of courses to be made mandatory.

6 one week courses held by IIT Bombay and IIT Kanpur for Government engineers in Rajkot, Gandhinagar, Bhuj on Seismic RetrofittingSeismic Design of Concrete and Masonry StructuresSeismic Design of Bridges andSpecial course in Earthquake Engineering for Architects

3 day Masonry Training Course for junior engineers of Jamnagar Municipal CorporationCapacity Building of State of Practice- Training Programs for Government Engineers

SEISMIC ENGINEERING TRAINING PROGRAM FOR DESIGN AND DRAWING PREPARATION

Babtie-ADB Capacity Building TA GSDMAMay 13-15 2002Alpa Sheth and Allan Mann

IS 4326 - 1993

Earthquake Resistant Design and Construction of BuildingBabtie -ADB TA

IS 13920 -1993

DUCTILE DETAILING OF RC STRUCTURES SUBJECTED TO SEISMIC FORCES

Babtie-ADB TA & GSDMAAlpa Sheth & Allan Mann

Road AheadFormulation of Systems and Procedures to assist Municipal and Area Development Authorities when review building plans to check for code conformance of the building designsEstablishing a methodology of drawings submissionHolding a workshop with municipal/ADA engineers to help them understand what is to be seen in drawings and know at a glance if the building is designed for seismic loads or not. Holding a workshop for municipal/ADA engineers to apprise them of latest seismic codes and their impact to design of structuresCapacity Building of State of Practice- Training Programs for Municipal Engineers Road Ahead

Training of MasonsIn some urban and most non-urban areas, a large amount of building activity (non-engineered buildings) in the hands of the masons with little or no technical input from qualified technical personnelFor Effective Training of Masons, Training Needs Assessment to be carried out Needs will be different in different parts of the stateTraining Strategy to be formulatedTraining Modules to be preparedInteraction with NGOsCompetency Based CertificationCapacity Building of State of Practice- Masons

There are about 40,000-50,000 masons in the state. Not more than 2-3% of the present stock of masons is formally trained!! Capacity Building of State of Practice- Masons - Present Scenario of Masons in State.

Present system of certification of masons requires 10th standard pass and does not have a mechanism for certifying competency of a mason who may have acquired skills through traditional means of apprenticeshipSuch masons constitute more than 95 % of the mason task force!!!Flaw in Present System.Capacity Building of State of Practice- Masons Flaw in present system.

Competency based certification will provide for Competency check of practicing mason. If there are any deficiencies, they will be identified and could be rectified by suitable training measures.Competency check for new entrants to the fieldCompetency based certification provides an opportunity to a mason for certification in his skill without any age or pre-qualification barriers.To improve safety standards in the trade.

Capacity Building of State of Practice- Masons Why competency based certification

Capacity Building of State of Practice- Masons Scope of the certification programIdeally, all masons should be certified. Need to move step by step. Logistics will not allow for certification of all masons in the short termIt is hoped that atleast 25% (Say 10000-12000) of the present stock of masons are certified for competency in the next five years- atleast 2000 per yearCertification is proposed to be kept voluntary.

Capacity Building of State of Practice- Masons Creating a Demand for CertificationConsidering the importance of certified Mason in all building construction activity, it could be considered to make it mandatory to engage certain % of certified Masons say for the first year 10-20% the second year 20-30% third year 30-50% 4th year onward 50-60% in public works related to Nagar Palikas, Maha Nagar Palikas, Area Development Authorities and Govt. Civil projects.

Review of IS Earthquake CodesBIS does not review codes often enough. IS 1893 revised after 18 years. The IS 13920 and IS 4326 not revised after 1993. Today even if you design as per IS 4326, you may be contravening IS 1893!!BIS has stopped preparing explanatory codes and handbooks for the IS codes. Without understanding the rationale behind a clause, it is difficult for engineers to appreciate the import of clauses. No examples to clarify doubts and applications. Capacity Building - State of Art

Capacity Building - State of Art

A study of review of all Seismic, Wind and Fire IS codes commissioned by GSDMA under WB project. This study includes preparation of Handbooks and Explanatory codes and recommendations for changes as per the best practices across the world keeping the Indian conditions in mind.

MicrozonationFeasibility Study of Seismic Micro-Zonation CommissionedCapacity Building - State of Art

Monitoring Mechanisms- Review of Development Control RulesDetailed Review of Development Control Rules with specific reference to those DC rules which adversely affect structural integrity such as Enclosed Balconies which cause columns to remain untiedLack of clear agency with supervision responsibility in DC rulesStilt Floor

Monitoring Mechanisms- New Bill for Licensing of EngineersBackgroundCurrently,In Gujarat, one has to register separately for every local authorityRegistration based on degree and experienceNo mechanism to ensure competence before registrationNo punitive provisions Even cancellation of registration with one local body does not affect registration with other bodies!Not uncommon for structural engineers to use someone elses license!

Structural Engineer deals with Life safety issues At times a very large number of lives can be jeopardizedHuge projects One-of-a-kind projectsNo opportunity for rectification of errors (intentional and unintentional)Engineering degree and experience does not ensure competence. Need to have a competence based licensing systemMonitoring Mechanisms- New Bill for Licensing of Engineers Background

Monitoring Mechanisms- New Bill for Licensing of EngineersWorkshop held for Competency Based Licensing of Structural Engineers -Overwhelming positive response to the introduction of competency based licensing of engineersOne week E-conference in March-April 2003 on Licensing Issues in Structural Engineering profession in the Indian context. More than 550 participants form across the country Again, a very strong support for examination based licensing of structural design engineersDraft bill to introduce Act Professionalisation of Engineers in final stagesDraft for Systems and Procedures for the Act under progressBill proposed to be tabled in next Session after approval of the Review Committee

Capacity Building - State of Art Home owners Guide for Earthquake SafetyPresently, very difficult for a layperson to decide whether his house is safe against earthquakes or whether he should buy into a particular property or how to go about building an earthquake resistant house. New user friendly manual for Homeowners on earthquake safety preparedFundamentals of earthquakes- the whys and howsHow to build a new house and ensure it is designed for earthquakesHow to buy a new flat and ensure it is designed for earthquakesHow to retrofit your existing house How to be prepared for an earthquakeWhat to do in the event of an earthquake

Ready for publishing by July end 2003

In many areas of the country, technical manpower not available to carry out sophisticated analysis as required by new IS earthquake codes. Need to have an in-between code for small, simple, symmetric one and two storey residential units. New Small Buildings Code for GujaratPreparation of Complete Code and Handbook with exhaustive design and detailing guidelines for Seismic Analysis and Design of Small Masonry Houses and Reinforced Concrete Frame Houses (G+1) for various spans and sizes of residential, user owned buildings for zones III, IV and VFirst of its kind in IndiaCapacity Building - State of Art Small Buildings Code - Road Ahead

Thank You..