DTIC ADA230972: Response of Low Rise Frame pdf

DTIC ADA230972: Response of Low Rise Frame

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The major objective of this study was to develop a simplified model to simulate the response of low-rise structures subjected to dynamic loads. This model incorporates the influence of soil and floor flexibility and is based upon underlying assumptions of static portal frame analysis. This study was extended to incorporate mono-symmetric structures (with and without setback) subject to self-induced torsion, as well as asymmetric frames. This model provides estimates of any force or displacement which might be determined in a corresponding space frame model. For selected design parameters, including maximum base shear and torque, maximum horizontal roof deflection, and maximum beam forces (shear, moment, and torque), the average errors for all comparisons to space frame calculations were less than ten percent. Preliminary studies assessed the impact of linear soil-structure interaction effects upon the response of space frames with flexible mat foundations and composite beam/slab floor systems. Within the limits of linear analysis of uniformly applied horizontal soil loads, mat flexibility was found significant only to the response of the mat foundation of the structure.

Dynamic loads and dynamic response above the mat are only slightly affected by soil and mat flexibility

• Creator/s: Defense Technical Information Center
• Date: 11/1/1990
• Year: 1990
• Book Topics/Themes: DTIC Archive, Higgins, John E, WEAPONS LAB (AFSC) KIRTLAND AFB NM, *SOILS, MATS, MODELS, INTERACTIONS, DYNAMICS, DYNAMIC RESPONSE, DISPLACEMENT, STRUCTURES, DEFLECTION, MOTION, ASYMMETRY, MATHEMATICAL ANALYSIS, LINEARITY, DYNAMIC LOADS, FRAMES, HORIZONTAL ORIENTATION, FOUNDATIONS(STRUCTURES), SIMPLIFICATION, TORQUE, TORSION, STATIC TESTS, ROOFS, SHEAR PROPERTIES, LINEAR SYSTEMS

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