Resist a minor level of earthquake motion without damage. Recommended lateral force requirements and commentary seismology committee structural engineers association of california on. Lateral force requirements and commentary and realworld decisions that designers face in their practice. Structural engineers association of california seaoc, sacramento, ca. Recommended lateral force requirements and commentary, 7th ed.
By order of the executive director office of the federal register washington, d. Recommended lateral force requirements and tentative. Seaoc, 1999a, recommended lateral force requirements and commentary blue book, seismology committee, structural engineers association of california, sacramento california. It is a subset of both structural and civil engineering. Requirements for seismically isolated structures in seismic engineering and practice, proceedings of the asce structures congress, american society of civil engineers, may 1989. Instead, the walls respond by transferring the inertial forces generated by their self weight to the diaphragms, which in turn transfer loads to the lateral load resisting elements. Need book recommendation for understanding seismic calcs. Effects of panel zone deformations on seismic response.
Mohasseb department of civil engineering, stanford university, stanford, california 94022, usa synopsis this paper shows that joint panel zone shear deformations may have a significant effect on the structure strength and stiffness and on the. The seaoc blue book, or recommended lateral force requirements and commentary, served for decades as the signature seaoc interpretation of the. Recommended lateral force requirements and tentative commentary. The design requirements permit the use of one of three different analysis procedures for determining the designlevel seismic loads. When seismic requirements are considered, the nominal uniform pressure caused by the action of. Since 1959, the recommended lateral force requirements blue book published. It gives more detailed information and commentary related to the three force levels described in the aisc and ubc sections. The blue book recommended lateral force requirements and tentative commentary was developed by the seismology committee of the structural engineers association of california. Earthquake spectra and design, 1982, nathan mortimore. Missouri university of science and technology scholars mine. Commentary and appendices based on nchrp project 1249, fy 98.
Structural engineers association of california, 1975, c1976. Recommended lateral force requirements and commentary, seventh edition, seismology committee, structural engineers association of. It is also argued that the crackedsection concept for determining stiffness of reinforced concrete structures may be realistic. Chapter commentary seismically isolated structure design. Published in 1999, this seventh edition represents a fiveyear effort by seaocs seismology committee to develop practical recommendations for deploying the 1997. Recommended lateral force requirements and commentary seismology committee structural engineers assocication fo california on. Select the seismic force resisting system including requirements for combinations of framing systems, as applicable and note r for later use sec. The new 1988 seaoc blue book and 1988 ubc overview of lateral. In general, the cqc is a superior combination method because it accounts for modal coupling quite well. Recommended lateral force requirements and commentary including errata see other formats.
Earthquakes load structures indirectly through ground motion. The first procedure uses a simple, lateral force formula similar to the lateral force coefficient now used in conventional building design to. Proposed draft provisions and commentary on ductile detailing of rc structures subjected to seismic forces by. Bssc, nehrp national earthquake hazards reduction program recommended provisions for the development of seismic regulations for new buildings and other structures. Doctoral programs structural engineering and mechanics. Structural engineers association of california, 1988.
Seaoc seismology committee, recommended lateral force requirements and commentary, structural engineers association of california, sacramento, ca, 1996, 1999. Recommended lateral force requirements and commentary including errata cfr sections. Proposed draft provisions and commentary on ductile. Since 1959, the recommended lateral force requirements blue book published by the seaoc seismology committee has heavily influenced the seismic design of structures. The 1999 seventh edition of the recommended lateral force requirements and commentary, also known as the seaoc blue book. Icbo lateral force october 1, 1999 recommended lateral force requirements and commentary seaoc blue book a description is not available for this item.
Recommended lateral force requirements and commentary. The structural engineers association of california. Responsibility seismology committee, structural engineers association of california. Recommended lateral force requirements and commentary including errata name of standards organization. A complete discussion of this method will not be offered here, but if you are interested, a good reference on this method is recommended lateral force requirements and commentary, 1999, published by seaoc structural engineers assoc.
Housner is widely considered as the father of the modern field of earthquake engineering. Shea, recommended lateral force requirements and commentary nonbuilding structures include all selfsupporting structures other than buildings that carry gravity loads and resist the. Recommended lateral force requirements and commentary 1999 seventh edition seismology committee structural engineers association of california. Mceeratc49 recommended lrfd guidelines for the seismic.
Recommended lateral force requirements and commentary including errata 42 cfr 52b. Recommended lateral force requirements commentary abebooks. It is suggested that the time is ripe for uncoupling the drift computation from calculated and often unrealistic lateral design forces and relating it directly to a design displacement spectrum. Seaoc blue book, recommended lateral force requirements and commentary, structural engineers association of california. Recommended lateral force requirements and commentary by seismology committee structural engineers assocication fo california and a great selection of related books, art and collectibles available now at. Seaonc isolation structural engineers association of northern california.
The recommended lateral force requirements and commentary is a document published by structural engineer association of southern california seaoc. In 1959, the structural engineers association of california seaoc seismology committee published the first edition of the blue book recommended lateral force requirements. Seaoc, recommended lateral force requirements and commentary, 7th edn. Figure 1 anchorage forces s due to lateral load roof common masonry. It is similar to what might be incorporated in a code as administrative regulations. Structural engineers association of california legally binding document.
Seaoc blue book 2009 compilation by guillermo santana issuu. The wall to be designed is one of several reinforced concrete walls in the building. Recommended lateral force requirements and commentary including errata. Code requirements for the selection and scaling of. The examples illustrate codecompliant designs engineered to achieve good performance under severe seismic loading. The fixedbase frames are designed in accordance with the 1990 structural engineers association of california seaoc recommended lateral force requirements and commentary, while the baseisolated. Structures designed by these codes and standards are expected see recommended lateral force requirements and commentary, 1996 edition, by the seismology committee of the structural engineers association of california, in general, to be able to. The seaoc blue book, or recommended lateral force requirements and commentary, served for decades as the signature seaoc interpretation of the seismic provisions of the uniform building code ubc. Design example 2 reinforced concrete wall with coupling beams. Standard specification load tables and weight tables for steel joists and joist girders 24 cfr 3280.
Seaoc is a professional association of four member or ganizations representing the. Steel research 8 1987 233250 effects of panel zone deformations on seismic response h. Seaoc, 1990, 1996, and other editions, recommended lateral force requirements and commentary, structural engineers association of california, sacramento, california. This, in effect, unified the building code requirements for all state agencies. Figure 3 shows a plot of accelerations recorded at various elevations in buildings during recent california earthquakes 3. The 2009 ibc structuralseismic design manual was developed to. Seismic code requirements for anchorage of nonstructural. Engineering notes for design with concrete block masonry. The first commentary on seismic design practice was published in 1960. It forms the basis for the seismic provisions of the 1997 ubc. Thus, the fundamental concern addressed in the codes is to insure that buildings will be designed to prevent collapse. The 2009 nehrp recommended provisions the provisions incorporates changes to ground motion criteria that significantly affect the analysis of isolated structures. Eminent authority on seismic risk mitigation, caltech professor george w.
Its purpose is to provide guidance on the interpretation and use of the seismic requirements in the 2006 international building code ibc, published by the international code council, inc. Recommended lateral force requirements and commentary, seventh edition, structural engineers association of california, sacramento, ca. As a licensed structural engineer and project manager, he is responsible for supervising all phases of project development, structural design and system selection, seismic design and rehabilitation of major projects, and construction administration. Earthquake engineering is the study of the behavior of buildings and structures subject to seismic loading. Significant changes were made to the seismic provisions. In some cases simply complying with buildingcode requirements does not ensure good seismic response. Also look into the 1999 seaoc bluebook recommended lateral force requirements and commentary section c704. The evaluation of shear strength of plywood sheathed walls with openings.
Seismology committee, structural engineers association of california, 1999. Chapter 1 is designed to be as compatible as possible with normal code administrative provisions. This approach was suggested in the recommended lateral force requirements and commentary by the structural engineers association of california. The earthquake resistant design regulations of the 1988 uniform building code ubc88 international conference of building officials 1988 are based mainly on the publication by the structural engineers association of california 1988 seaoc1988 entitled recommended lateral force requirements and tentative commentary, which is based to some extent on the. Code requirements for wall anchorage design have improved signi. Seismology committee, structural engineers association of california, 1974, recommended lateral force requirements and commentary, 171 2 nd street, san francisco, ca. The ubc, published by the international conference of building officials icbo, has incorporated the new seaoc recommended provisions. Static eccentricity concept for torsional moment estimations. Proposed draft provisions and commentary on ductile detailing. This sevenpage document contained the four original r factors for seismic design they were called k factors in those days. The intent of the blue book up until the seventh edition 1999 was to act as a vehicle for writing recommended minimum code requirements and providing commentary regarding.
Recommended lateral force requirements and commentary book. Recommended lateral force requirements and commentary in. Recommended lateral force requirements and commentary seismology committee on. Recommended lateral force requirements and commentary seaoc blue book, 7th edition. Seaoc blue book recommended lateral force requirements and commentary, seismology committee, structural engineers association of california, 1996 sixth edition and 1999 seventh. He has been the structural engineerofrecord for numerous construction projects, including a mixeduse development consisting of 1500 apartment units combined with a 750 parking space subterranean concrete parking garage. Recommended lateral force requirements and commentary, 1974. Mceeratc49 recommended lrfd guidelines for the seismic design of highway bridges part ii. Efficient mass participation ratio of building with basement. Seaoc 1999 seismology committee, structural engineers association of california. In this approach, the floor eccentricity should be defined as the distance between the generalized center of rigidity and the load resultant at that floor. Structural engineers association of california, 1999. The recommended lateral force requirements and commentary 1, published in 1990 by the seismology committee of the structural engineers association of california. Structural engineers association of california, 1999 buildings 440 pages.
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