拉鏈柱支撐鋼框架結(jié)構(gòu)靜力推覆試驗及數(shù)值模擬
發(fā)布時間：2018-08-04 08:11
【摘要】：為研究拉鏈柱支撐鋼框架結(jié)構(gòu)在水平荷載作用下的承載能力、抗側(cè)剛度、破壞模式以及構(gòu)件的傳力模式等,對一個3層單跨1∶2.6縮尺比例的拉鏈柱支撐鋼框架進(jìn)行了靜力推覆試驗及數(shù)值模擬。結(jié)果表明:在對應(yīng)8度多遇及設(shè)防烈度地震作用工況的水平側(cè)移下,結(jié)構(gòu)基本處于彈性工作狀態(tài),構(gòu)件未出現(xiàn)明顯失穩(wěn)現(xiàn)象。在對應(yīng)8度罕遇地震作用工況的水平側(cè)移下,由于支撐失穩(wěn)導(dǎo)致結(jié)構(gòu)抗側(cè)剛度明顯降低,但結(jié)構(gòu)的承載力并無明顯下降,隨著加載的進(jìn)一步進(jìn)行,因支撐失穩(wěn)產(chǎn)生的豎向不平衡力主要由拉鏈柱承擔(dān),且該不平衡力由此逐層向上傳遞,導(dǎo)致頂層支撐的軸壓力逐漸增加;當(dāng)反向卸載時,拉鏈柱構(gòu)件承擔(dān)部分壓力,但并未失穩(wěn)�？傮w上,結(jié)構(gòu)各構(gòu)件的受力狀態(tài)及傳力過程與設(shè)計目標(biāo)基本一致,結(jié)構(gòu)在靜力推覆試驗中表現(xiàn)出良好的受力性能。
[Abstract]:In order to study the bearing capacity, lateral stiffness, failure mode and force transfer mode of steel frame structure supported by zipper column under horizontal load, etc. The static push-over test and numerical simulation of a 3-story single-span 1: 2.6 scale steel frame braced with zipper column are carried out. The results show that the structure is basically in the elastic working state under the horizontal lateral movement corresponding to the frequent occurrences of 8 degrees and the earthquake action conditions of fortification intensity, and no obvious instability occurs in the members. The lateral stiffness of the structure is obviously decreased due to the instability of the bracing, but the bearing capacity of the structure does not decrease obviously under the condition of lateral displacement corresponding to the earthquake action of 8 degrees, and with the further loading, the bearing capacity of the structure does not decrease obviously. The vertical unbalance force caused by the instability of the bracing is mainly borne by the zipper column, and the unbalance force is passed up layer by layer, which results in the axial pressure of the top bracing gradually increasing; when unloaded in reverse, the zipper column member bears part of the pressure. But it is not unstable. On the whole, the stress state and the force transfer process of the structural members are basically consistent with the design goal, and the structure shows good mechanical performance in the static push-over test.
【作者單位】： 河北科技大學(xué)建筑工程學(xué)院;哈爾濱工業(yè)大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51208169) 河北省自然科學(xué)基金項目(E2014208115) 河北省教育廳項目(QN2016052)
【分類號】：TU391
，
本文編號：2163206
[Abstract]:In order to study the bearing capacity, lateral stiffness, failure mode and force transfer mode of steel frame structure supported by zipper column under horizontal load, etc. The static push-over test and numerical simulation of a 3-story single-span 1: 2.6 scale steel frame braced with zipper column are carried out. The results show that the structure is basically in the elastic working state under the horizontal lateral movement corresponding to the frequent occurrences of 8 degrees and the earthquake action conditions of fortification intensity, and no obvious instability occurs in the members. The lateral stiffness of the structure is obviously decreased due to the instability of the bracing, but the bearing capacity of the structure does not decrease obviously under the condition of lateral displacement corresponding to the earthquake action of 8 degrees, and with the further loading, the bearing capacity of the structure does not decrease obviously. The vertical unbalance force caused by the instability of the bracing is mainly borne by the zipper column, and the unbalance force is passed up layer by layer, which results in the axial pressure of the top bracing gradually increasing; when unloaded in reverse, the zipper column member bears part of the pressure. But it is not unstable. On the whole, the stress state and the force transfer process of the structural members are basically consistent with the design goal, and the structure shows good mechanical performance in the static push-over test.
【作者單位】： 河北科技大學(xué)建筑工程學(xué)院;哈爾濱工業(yè)大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51208169) 河北省自然科學(xué)基金項目(E2014208115) 河北省教育廳項目(QN2016052)
【分類號】：TU391
，
本文編號：2163206
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