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- W2271249062 abstract "Lateral load-resisting structural members, such as piers, are often analyzed under one component base excitation. The influence of bidirectional shaking is accounted for by using a simplified 30% rule. During seismic shaking, piers are often subjected to bidirectional ground motion, which leads to a complex combination of biaxial moments. In this backdrop, a RC bridge pier has been analyzed under a set of bidirectionally applied near-field motions with forward directivity (FD) and fling-step characteristics. Bidirectional interaction under near-fault motion is observed to substantially amplify damage, particularly for a stiff system (30% and 45%–50% under FD and fling motions, respectively). A complex combination of bidirectional load paths may have also contributed to increased vulnerability. Additional studies have shown that pulses with fling-step characteristics may often be more detrimental than FD, at least for the first mode-dominated systems. The roles of important ground-motion parameters, such as Arias intensity, mean period, and significant duration, that regulate this interaction effect are discussed. Using energetic length and mean period as characteristic linear and time dimensions, a self-similar response scenario has emerged even when degradation, complex loading patterns under bidirectional shaking, and record-to-record variability coexisted. Geometric nonlinearity in the presence of an axial force may have intensified the interaction effect, as revealed through a sample code-designed pier." @default.
- W2271249062 created "2016-06-24" @default.
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- W2271249062 date "2016-07-01" @default.
- W2271249062 modified "2023-09-25" @default.
- W2271249062 title "Influence of Bidirectional Near-Fault Excitations on RC Bridge Piers" @default.
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- W2271249062 doi "https://doi.org/10.1061/(asce)be.1943-5592.0000836" @default.
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