【摘要】：為研究帶剪力鍵的圓形灌漿套管軸向承載力性能,開展6個(gè)灌漿套管試件的軸壓試驗(yàn)。試驗(yàn)發(fā)現(xiàn):灌漿套管軸向受壓時(shí),剪力鍵附近灌漿體應(yīng)力集中,產(chǎn)生細(xì)小斜裂紋;壓力繼續(xù)增大,斜裂紋沿剪力鍵之間的連線方向逐步發(fā)展并貫通,最終灌漿體被壓碎;在加載初始階段其位移-荷載關(guān)系為線性,當(dāng)壓力繼續(xù)增大時(shí),位移-荷載曲線進(jìn)入非線性階段,當(dāng)達(dá)到其峰值承載力后,套管仍具有一定的殘余承載力和延性變形能力。采用脆性開裂模型(brittle cracking)模擬高強(qiáng)灌漿體,對(duì)6個(gè)試件的軸壓過(guò)程進(jìn)行數(shù)值模擬,計(jì)算得到的裂縫開裂過(guò)程、破壞形態(tài)和承載力曲線與試驗(yàn)結(jié)果吻合。
[Abstract]:In order to study the axial bearing capacity of circular grouting casing with shear bond, the axial compression tests of six grouting casing specimens were carried out. It is found that when the grouting casing is subjected to axial compression, the stress concentration of the grouting body near the shear key leads to fine oblique cracks, and the oblique cracks continue to increase, and the oblique cracks develop and pass through step by step along the line between the shear bonds, and finally the grouting body is crushed. The displacement-load relationship is linear in the initial stage of loading. When the pressure continues to increase, the displacement-load curve enters the nonlinear stage. When the peak bearing capacity is reached, the casing still has a certain residual bearing capacity and ductile deformation capacity. The brittle cracking model (brittle cracking) is used to simulate the high strength grouting body. The axial compression process of six specimens is simulated by numerical simulation. The calculated crack cracking process, failure form and bearing capacity curve are in good agreement with the experimental results.
【作者單位】： 浙江大學(xué)建筑工程學(xué)院;浙江省能源局;
【分類號(hào)】：TM614

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1 王國(guó)慶;海上風(fēng)機(jī)大直徑灌漿套管軸向承載力研究[D];浙江大學(xué);2017年

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本文編號(hào)：2514731