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Iuinwnmiihumi 1 iuinwnmiihumi A II S A I INFLUENCIAE ALAS CONDICIONES LOCALES 'DEL SUELO ÉkN''MOVIMIENTOS DEL TERRENO ;,* EN, DAÑOSaA EDIFICIOSDURANTE SISMOS HARRY BOLTON SEED OCTAVA CONFERENCIA NABOR CARRILLO Presentada en la Sociedad Mexicana de Mecánica de Suelos en la XIII Reunión Nacional, Mazatlán, Sinaloa, México México, Noviembre 22, 1986 HARRY BOLTON SEED 1;._. : i . 13 13' 16 r Or TECA yEEpW flEOW{RDO Sa Copyright, México, 1990 SOCIEDAD MEXICANA DE MECANICA DE SUELOS, A.C. Valle de Bravo No. 19, Col. Vergel de Coyoacán 14340 México, D.F., MEXICO Los derechos de autor fueron generosamente cedidos a la SMMS por el Profesor H. Bolton Seed. Presidente del Comité Organizador: Juan Jacobo Schmitter Traducción de la versión en Español: Por personal de la Secretaría de Comunicaciones y Transportes bajo la dirección de Alfonso Rico Rodríguez. Revisión y corrección de estilo: Raúl Esquivel Díaz DibujoyMontaje:PersonaldelaSubdirecciónGeneralde Conducciones y Captaciones SARH y Everardo Fuentes de la Rosa Mecanografía: Yolanda Briseño Almaraz Edición: Juan Jacobo Schmitter y Francisco González Valencia Impreso en México. Prohibida su repoducción por cualquier medio sin previa autorización por escrito de la SMMS. Lasopinionesydatospresentadossondelaexclusiva responsabilidaddelautor.La SMMS noasume ninguna responsabilidad por las opiniones y declaraciones contenidas en esta publicación. pt b. ti r.;4. 2318 I N D I C E TRIBUTO A HARRY BOLTON SEED. Miguel P. Romo Organista VII PRESENTACION DEL CONFERENCISTA Juan J. Schmitter IX CURRICULUM VITAE DEL CONFERENCISTA XI CONFERENCIA "Influencia de las Condiciones Locales del Suelo en MovimientQs delTerreno y en Dar?os a Edificios Durante Sismos" 1 SESION DE PREGUNTAS Y RESPUESTAS 17 3 BASES DE LA CONFERENCIA NABOR CARRILLO 18 8 V TRIBUTO A HARRY BOLTON SEED por Miguel P. Romo Organista Harry Bolton Seed nació en Bolton Inglaterra, el 22 de agosto de 1922. Estudió en el King's College de la Universidad de Londres, donde obtuvolalicenciatura en IngenieríaCivilen 1944 yel doctorado en Ingeniería Estructural en 1947. Después de dos años como catedrático asociado en King's College, Seed viajó a Estados Unidos para estudiar Mecánica de Suelos en laUniversidad de Harvard bajo el tutelaje de Karl Terzaghi y Arthur Casagrande, donde recibió el grado de Maestro en 1948 y fue instructor durante el siguiente año. En 1950, el profesor Seed se unió al personal académico de la Universidad de California, Berkeley, donde permaneció el resto de su carrera como educador e investigador en Ingeniería Geotécnica. El diseñóelprogramadeIngenieríaGeotécnica enBerkeley que posteriormente se considero como uno de los más completos y mejores del mundo. El profesor Seed tuvo un enorme impacto en cada área en que trabajó en su actividad como investigador. Su trabajo pionero sobre la mecánica de cimentaciones piloteadas constituye todavía la base de métodos modernos de interacción suelo -pilote. Sus investigaciones sobresuelocompactado ylainfluenciadelosmétodosde compactación en la estructura del suelo y sus propiedades mecánicas proporcionan la base del conocimiento actual en este tema. Sus contribuciones en métodos analíticos para el diseño de pavimentos fueron de primer nivel. En 1960introdujo elnuevo campo de Ingeniería Geotécnica de Sismos, y mundialmente se le reconoce como el"padre" de este campo. Sus trabajos pioneros incluyen el desarrollo de métodos para el análisis de la respuesta sísmica de sitios, para el análisis de interacción dinámicasuelo -estructura,paralaevaluación dela sismicidad y para la estimación de la susceptibilidad a la licuación de depósitos de suelos granulares saturados. Los resultados de estas investigaciones condujeron a una revisión total de los conceptos y métodos para el diseño sismo resistente de presas de tierra, plantas nucleoeléctricas,obrasportuariasy cimentacionesdeedificios, así como a la revisión de Reglamentos de Construcción. Este trabajo, basado en principios científicos sólidos,ha recibido una amplia aceptación entodoelmundo y seguramenteinfluirálas investigaciones futuras durante muchas generaciones. VII La labor de Harry Seed como educador, académico y siervo de su profesión es insuperable. El fue el epítome de un académico modelo dedicado al avance de la ciencia y la práctica de la ingeniería. Dedicó mucho tiempo a las actividades de servicio público. Siempre fue un brillante conferencista y reconocido por muchos años como el mejor catedráticoy educadorde suespecialidad.Guióa50 candidatosalgradodedoctoraunexitosotérminodesus investigaciones doctorales; muchos de ellos son reconocidos en el campo de la Ingeniería Geotécnica. Sus trabajos escritos (más de 300 artículos e informes técnicos) son excepcionalmente lúcidos (y visionarios) y proporcionan un testigo elocuente y perenne de su trabajo. Se mantuvo en plena actividad hasta poco antes de su muerte en abril de 1989. Elprofesor Seedrecibiómuchos honoresy premiospor sus contribuciones.LaSociedadAmericanadeIngenierosCiviles (American Society of Civil Engineers) le otorgó más premios que a cualquier otro ingeniero en la historia de la Sociedad. Además el Presidente Reagan le otorgó la Medalla Nacional de Ciencia en 1987. Era miembro delaAcademia Nacional deIngenieríaydela Academia Nacional de Ciencias, Miembro Honorario de la Sociedad Americana de Ingenieros Civiles, del Instituto de Investigación en Ingeniería Sísmica y de la Sociedad Mexicana de Mecánica de Suelos. En 1988 recibió el primer Doctorado Honoris Causa otorgado por la EscuelaNacionaldePuentesy CaminosenParís.Juntocon CasagrandeyPecksonlosúnicosquehandictadolastres conferencias internacionales más importantes en Mecánica de Suelos: La Terzaghi, la Rankine y la Nabor Carrillo. El Dr. Seed fue verdaderamente un gigante de su generación y todos los que tuvimos la fortuna de trabajar con él nos enriquecimos enormemente. Todos los que lo conocimos bien lo recordaremos como una persona generosa y compasiva; con arrojo, con visión incisivay con un amplio espectro de intereses en el mundo que lo rodeaba. Ningún problemaera demasiado pequeñoparaser analizadoy resuelto; a cada persona le daba su tiempo y su consideración. Harry Seed fue verdaderamente un profesor en el sentido más alto de la palabra. VIII PRESENTACION DEL CONFERENCISTA por Juan J. Schmitter Siempre hay muchos problemas técnicos en un país en desarrollo como México, donde la Mecánica de Suelos puede y debe participar de manera relevante para una mejor comprensión de los mismos y aplicar a la solución más eficiente. Conferencias-reconocidasinternacionalmente, comola Carrillo, ofrecen ventanas a experiencias que se han tenidon todo el mundo que ayudan a identificar soluciones más eficientepara problemas no resueltos, interactuando con la experiencia local. La Octava Conferencia Nabor Carrillo, que será presentada eldía de hoy por el Profesor Harry Bolton Seed, nos permitirá mirar a través de una de esas "ventanas" para observar "La influencia de las Condiciones Locales del Suelo en Movimientos del Terreno y en Daños a Edificios Durante Sismos ",la cual ha despertado tanto interés debido a la dura prueba de conocimiento que la Naturaleza presentó en la Ciudad de México en septiembre de 1985. Nuestrodistinguidohuésped, queaceptóparticiparenesta Conferencia hace más de un año, nos dijo: "Es para mi un gran honor y estoy encantado de aceptar ", expresando también sus más sinceras condolencias al pueblo de México, por su pena. HARRY BOLTON SEED es Profesor deIngenieríaCivilenla UniversidaddeCalifornia,Berkeley,y DirectordelCentro de Investigación de Ingeniería Sísmica. Obtuvo el grado de B. Sc. en el King's College, de la Universidad de Londres, en 1944; el grado de S.M. en la Universidad de Harvard, en 1947 y el grado de Ph. D. en el King's College, de la Universidad de Londres, en 1948. Su experiencia académica se inició en 1945 en el King'sCollege como "conferencista asistente" y continuó como "instructor" en la Escuela de Graduados de Ingeniería de la Universidad de Harvard, de 1948 a 1949. Después en la Universidad de California, Berkeley, como Profesor Asistente(1950- 1955); Profesor Asociado (1955 -1960) y Profesor desde 1960 hasta la fecha. IX Su experiencia como ingeniero es muy rica, cubriendo campos de interés en Mecánicade Suelos, Diseño S ísmico, Diseño General, Tímeles para autopistas y caminos subterráneos, Grandes Proyectos para generar electricidad y Presas de Tierra. Como se puede ver enlasección "Honores y Premios" de su Currículum,presentó laConferenciaTerzaghien1967,la ConferenciaRankine en1979,yahora,laConferencia Nabor Carrillo. X Curriculum Vitae H. BOLTON SEED Título: Professor of Civil Engineering, University of California, Berkeley Director, Earthquake Engineering Research Center Educación: B.Sc., King's College, London University, 1944 S.M., Harvard University, 1947 Ph. D., King's College, London University, 1948 Experiencia Académica: Assistant Lecturer', King's College, London University, 1945 -47. Instructor, Harvard University Graduate School of Engineering, 1948 -49. AssistantProfessor (1950 -55), AssociateProfessor(1955 -60), Professor (1960- present), University of California, Berkeley. Chairman, Department of Civil Engineering, University of California, Berkeley, 1965 -71. Experiencia como Ingeniero: FoundationEngineer,Thomas WorcesterInc.,ConsultingEngineers, Boston, 1949 -1950. Desde 1953, Consultor en problemas demecánica de suelos y de diseño sísmico para: World Bank U.S. Army Corps of Engineers U.S. Bureau of Reclamation U.S. Department of the Interior U.S. Geological Survey
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