The buckling behaviour of stiffened plates under different loading conditions which has been the topic of the authors investigation, both experimentally and numerically, during last three decades has been reviewed concisely in this chapter. Chen et al. [ 7] carried out experimental investigations on 12 stiffened plates under in-plane longitudinal compression, purely or in combination with lateral load. The specimens were in different damage conditions: seven “as-built”, two “dented” and three “corroded”. Hu and Jiang [ 8] simulated some of the tests made by Chen et. al. [ 7], using the commercial program ADINA [ 9] and in-house program VAST [ 10], both based on the FEM. The former was used to analyse the “as-built” and “dented” stiffened plates, whereas the “corroded” specimens were analysed using VAST [ 4]. It was found, that in most cases the FEM produced similar responses to those of experimental results up to the loss of structural continuity. Grondin et al. [ 11] made a parametric study on the buckling behaviour of stiffened plates using the FEM-based commercial program ABAQUS [ 12]. Sheikh et. al. [ 13] extended the studies in [ 11] to investigate the combined effect of in-plane compression and bending using the same program. In these studies, only tee-shape stiffeners, plate aspect ratios, plate-to-stiffener cross-sectional area ratio with different initial imperfections of the plates were investigated.
All the cited studies, either experimentally or numerically, investigated the strength behaviour of longitudinally stiffened plates with specific boundary conditions. The continuity of both plates and stiffeners in thin-walled structures, composed of stiffened plates, leads to an interaction among the adjacent panels. Among the several available experimental investigations, two series of well executed experimental data on longitudinally multi-stiffened steel plates, with and without transversal stiffeners subjected to uniform axial in-plane load carried out to study the buckling and post-buckling up to final failure have been chosen. The first series are those of Ghavami [ 14] where the influences of stiffener cross-section of the type rectangular (R), L and T, as shown in Figure 4, have been investigated. The spacing of the stiffeners and the presence of rigid transversal stiffeners on the buckling behaviour up to collapse have also been studied. The second series of Tanaka & Endo [ 15], where the behaviour of stiffened plates have three and two flat bars for longitudinal and transversal stiffeners respectively, were analysed. Besides, owing to the recent progress in the field of finite element method and available powerful FEM programs, it has been possible to assess the structural behaviour of the considered plates and stiffeners subjected to any combination of loads.
The buckling behaviour of stiffened plates under different loading conditions which has been the topic of the authors investigation, both experimentally and numerically, during last three decades has been reviewed concisely in this chapter. Chen et al. [ 7] carried out experimental investigations on 12 stiffened plates under in-plane longitudinal compression, purely or in combination with lateral load. The specimens were in different damage conditions: seven “as-built”, two “dented” and three “corroded”. Hu and Jiang [ 8] simulated some of the tests made by Chen et. al. [ 7], using the commercial program ADINA [ 9] and in-house program VAST [ 10], both based on the FEM. The former was used to analyse the “as-built” and “dented” stiffened plates, whereas the “corroded” specimens were analysed using VAST [ 4]. It was found, that in most cases the FEM produced similar responses to those of experimental results up to the loss of structural continuity. Grondin et al. [ 11] made a parametric study on the buckling behaviour of stiffened plates using the FEM-based commercial program ABAQUS [ 12]. Sheikh et. al. [ 13] extended the studies in [ 11] to investigate the combined effect of in-plane compression and bending using the same program. In these studies, only tee-shape stiffeners, plate aspect ratios, plate-to-stiffener cross-sectional area ratio with different initial imperfections of the plates were investigated.ทั้งหมดอ้างอิงการศึกษา experimentally หรือเรียงตามตัว เลข ตรวจสอบพฤติกรรมความแข็งแรงของแผ่น longitudinally stiffened มีเงื่อนไขขอบเขตที่ระบุ ความต่อเนื่องของแผ่นและ stiffeners ในบางผนังโครงสร้าง ประกอบแผ่น stiffened นำไปสู่การโต้ตอบระหว่างการติดตั้งติดกัน ระหว่างที่หลายพร้อมใช้งานทดลองสืบสวน สองชุดดีดำเนินการทดลองใน longitudinally หลาย stiffened เหล็กแผ่น มี และไม่ มี stiffeners transversal ภายใต้เครื่องแบบแกนในระนาบโหลดดำเนินการศึกษาการ buckling และหลัง buckling ถึงความล้มเหลวสุดท้ายได้รับเลือก ชุดแรกเป็นของ Ghavami [14] ซึ่งอิทธิพลของ stiffener ระหว่างส่วนชนิดสี่เหลี่ยม (R), L และ T ดังที่แสดงในรูปที่ 4 มีการตรวจสอบ ระยะห่างของการ stiffeners และของ stiffeners transversal แข็งในพฤติกรรม buckling ถึงยุบได้นอกจากนี้การศึกษา ชุดที่สองของทานากะและ Endo [15], ซึ่งพฤติกรรมของแผ่น stiffened มีแถบแบนสาม และสองในระยะยาว และ transversal stiffeners ตามลำดับ ถูก analysed นอกจาก เนื่องจากความคืบหน้าล่าสุดในโปรแกรม FEM มีประสิทธิภาพที่มีและวิธีไฟไนต์ แล้วไปประเมินพฤติกรรมโครงสร้างเป็นแผ่นและ stiffeners ต้องโหลดกัน
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