Earthquake Excitation for SDOF System
When analysing a system’s response under earthquake excitation, we often make use of the ground acceleration data recorded from previous seismic even…
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Foundation-Settlement of Shallow Foundation from CPT Data
Schmertmann (1970) proposed the method to calculate the settlement of shallow foundation based on simplified distribution of vertical strain beneath.…
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Foundation-Settlement of Shallow Foundation from SPT Data
The relationship between compressibility of soil, foundation width and average SPT blow count over the depth of influence was determined by Burland a…
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Impact Load for SDOF System
Based on the impulse formulation, we can derive the fundamental expression for the impact load on a dynamic system. From here, we can produce Duhamel…
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Foundation-Settlement of Shallow Foundation from Consolidation Theory
Consolidation of soil can be predicted based on the result of oedometer tests on soil specimens. To implement the oedometer test result, Skempton a…
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Force Transmissibility
Other than motion transmissibility, we can also determine the force transmissibility of a dynamic system. In this case, our analytical model needs to…
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Foundation-Settlement of Flexible Footing in Saturated Clay
Janbu, Bjerrum and Kjaernsli (1956) proposed an equation to calculate the average settlement of a flexible footing embedded on saturated clay, under …
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Foundation-Settlement of Shallow Foundation from Elastic Theory
The displacement of soil layer can be estimated based on linear stress-strain relationship. This relationship assumes the soil mass to possesses th…
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Harmonic Motion of Foundation due to Motion Excitation
When the foundation of structure vibrates due to external source, the response of structure needs to take such movement into account, rather than c…
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Foundation-Soil Stress Under Rectangular Area with Uniform Pressure
When determining the soil stress under a rectangular area subjected to uniform pressure, Fadum’s chart is commonly used. To use the chart, we first…
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Foundation-Soil Stress Under Line Load and Strip Area Pressure
Stress beneath soil due to line load can be determined knowing both horizontal distance and the depth of the interested point from the load. When t…
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Harmonic Excitation by Machine
Machine usually vibrates in certain frequency, and its force magnitude does not vary often. Thus, we can determine the harmonic excitation of machine…
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