耦合: (coupled analysis), that means movement in different material should be continuous. In other $<^t][{
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word, the displacement in every node should be continuous. For example, in two different B X@Iq
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material(soil and concrete or steel), the stiffnesses are huge different, the displacements in the joint K9lgDk"i
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nodes will occur problem without coupled model(the node displacements calculated from two jointed %z><)7
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element are different). So the interface elements are introduced to solve ,^#Jw`w^
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this issue. But there still is problem for crack or big displacement because Finite Element Method g{65 QP
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hard handle these problems from its assumption. @X2*O9
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相互: (interaction), that means the structure will affect the soil behavior. For example, the lateral displace from the structure in retaining structure will affect the lateral earth pressure coefficient(K0,Ka, Kp) and so on. | p11 Jt[
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Hope some help!
