The final nonlinear algebraic equation set is solved using the step - by - step newton - raphson iteration and the deformed curves for the corresponding state of each load increment can be determined 對應(yīng)每個荷載增量,可求得鋼管混凝土拱在相應(yīng)狀態(tài)下的變形曲線。對各荷載增量進行反復迭代,直至得到荷載的極限值。
That is the identification of material parameter is done through the true deformation increment in the loading stage before , loading increment , and the stress state by artificial neural networks , after this , we can get loading increment for the next deformation stage by the artificial neural networks trained by stress stage , target deformation increment and the identified m value 即首先根據(jù)上一步加載材料的實際應(yīng)變增量、所加應(yīng)力增量以及材料所在的應(yīng)力狀態(tài)識別出材料物性參數(shù)m值,然后再根據(jù)材料加載后的應(yīng)力狀態(tài)、目標應(yīng)變增量以及識別所得m值,由訓練好的識別應(yīng)力增量的人工神經(jīng)網(wǎng)絡(luò)產(chǎn)生應(yīng)加的載荷增量。
And because the excavation is often processed in steps during the multi - timbering structure construction , the thesis also analyses briefly to the multi - timbering structure on each working condition during the process of excavation and compares it with the actual measurement combining with the analysis method considering soil - structure and load increment method which is put forward in the thesis 同時,本文也針對多支撐支護結(jié)構(gòu)施工時,存在的分步開挖的情況,結(jié)合本論文所提考慮土-結(jié)構(gòu)共同作用的分析方法及荷載增量法理論,對多支撐支護結(jié)構(gòu)在開挖過程中各工況進行了簡要分析,并與實測結(jié)果進行了比較分析。