In order to achieve an optimal anti-seismic behavior,or rather stability,the out-of-plane stability of infill wall in frame has been researched with the shaking test of four sets of two-layer infill wall,in which four...In order to achieve an optimal anti-seismic behavior,or rather stability,the out-of-plane stability of infill wall in frame has been researched with the shaking test of four sets of two-layer infill wall,in which four different connection modes of filled with inclined bricks on the top,disconnection,flexibility and semi-flexibility were adapted.The acceleration and displacement response of the specimens were analyzed under the seismic load.Also,some feasible connection modes were gained by comparing the response of infill walls.Finally,the calculation of earthquake of infill wall was held.The results showed that seismic responses of the infill walls whose connect with frame in form of flexibility and semi-flexibility modes are weaker than others obviously,and their integrality is better.Thus the conclusion could be drawn that out-of-plane stability of the specimens with connection modes of flexibility and semi-flexibility are better than those with the connection modes of filled with inclined bricks on the top and disconnection.The research results can provide evidence for establishing specifications and directing the construction and therefore help reduce the casualties and property loss caused by earthquake disasters.展开更多
The purpose of this research is to study the dynamic responses of gravity quay walls with block type consisting of“three blocks”experimentally.For this purpose,1g shaking table tests were conducted under different c...The purpose of this research is to study the dynamic responses of gravity quay walls with block type consisting of“three blocks”experimentally.For this purpose,1g shaking table tests were conducted under different cyclic loadings for two different saturated granular backfill materials(Soil 1 and Soil 2).In this study,D_(n50) of Soil 1 and Soil 2 are selected as 2.2 cm and 1.0 cm,respectively.During the experiments,accelerations,soil pressures and displacements were measured for each block.Test results pointed out that Soil 2 caused more damage on structures.The measurements for displacement and tilting of each block were discussed in view of“acceptable level of damage in performance-based design”given in PIANC(2001).The result of the study showed that the definitions of damaged levels given in PIANC(2001)were reliable for using in performance-based methods for seismic design of block type quay walls.展开更多
以蔗糖、麦芽糖醇及二者复配的三元溶液为渗透溶液,探究渗透脱水处理对黄桃果块质构特性、介电特性、细胞壁多糖含量以及微观结构的变化,并利用核磁共振氢谱(1H nuclear magnetic resonance,1H NMR)技术测定了可溶性糖含量的变化,明确...以蔗糖、麦芽糖醇及二者复配的三元溶液为渗透溶液,探究渗透脱水处理对黄桃果块质构特性、介电特性、细胞壁多糖含量以及微观结构的变化,并利用核磁共振氢谱(1H nuclear magnetic resonance,1H NMR)技术测定了可溶性糖含量的变化,明确麦芽糖醇和蔗糖的协同作用在渗透脱水过程中对黄桃果块特性的改善作用。结果表明:相较于对照组,SM14(蔗糖、麦芽糖醇质量比1∶4的溶液)显著降低黄桃果块的硬度、咀嚼性和黏附性。渗透脱水处理导致黄桃果块的阻抗和有效电阻显著降低,同时诱导静电容量显著增加,表明渗透脱水可能作用于细胞壁多糖而使果肉细胞特性改变。1H NMR检测结果发现,与蔗糖组相比,三元渗透液处理显著降低了黄桃果块组织中蔗糖的含量,其中SM14处理组蔗糖信号强度仅为19803.9±156.00,麦芽糖醇信号强度为54934.9±1239.11。此外,相比较对照组,SM14组水溶性果胶和鳌合性果胶含量均显著增加,分别为(26.63±1.80)mg/g和(21.59±0.71)mg/g,碱溶性果胶含量显著降低,为(27.24±0.46)mg/g。微观结构观察发现,SM14处理组细胞圆润且完整度较高,塌陷程度低,细胞壁厚度明显增加,这可能是由于蔗糖与麦芽糖醇之间的交互作用有对细胞的协同保护作用。因此,蔗糖与麦芽糖醇复配的三元渗透溶液可以有效地改善二元渗透脱水导致的黄桃果块品质劣变等问题,同时拓宽了糖醇的应用场景。展开更多
基金Sponsored by the National Key Technology R&D Program in the 11th Five Year Plan of China(Grant No.2008BAJ08B11-03)Ministry of Construction Research and Development Project of China(Grant No.06-k6-17)
文摘In order to achieve an optimal anti-seismic behavior,or rather stability,the out-of-plane stability of infill wall in frame has been researched with the shaking test of four sets of two-layer infill wall,in which four different connection modes of filled with inclined bricks on the top,disconnection,flexibility and semi-flexibility were adapted.The acceleration and displacement response of the specimens were analyzed under the seismic load.Also,some feasible connection modes were gained by comparing the response of infill walls.Finally,the calculation of earthquake of infill wall was held.The results showed that seismic responses of the infill walls whose connect with frame in form of flexibility and semi-flexibility modes are weaker than others obviously,and their integrality is better.Thus the conclusion could be drawn that out-of-plane stability of the specimens with connection modes of flexibility and semi-flexibility are better than those with the connection modes of filled with inclined bricks on the top and disconnection.The research results can provide evidence for establishing specifications and directing the construction and therefore help reduce the casualties and property loss caused by earthquake disasters.
基金The study was financially supported by the Scientific and Technological Research Council of Turkey(TUBITAK)(Grant No.111Y006).
文摘The purpose of this research is to study the dynamic responses of gravity quay walls with block type consisting of“three blocks”experimentally.For this purpose,1g shaking table tests were conducted under different cyclic loadings for two different saturated granular backfill materials(Soil 1 and Soil 2).In this study,D_(n50) of Soil 1 and Soil 2 are selected as 2.2 cm and 1.0 cm,respectively.During the experiments,accelerations,soil pressures and displacements were measured for each block.Test results pointed out that Soil 2 caused more damage on structures.The measurements for displacement and tilting of each block were discussed in view of“acceptable level of damage in performance-based design”given in PIANC(2001).The result of the study showed that the definitions of damaged levels given in PIANC(2001)were reliable for using in performance-based methods for seismic design of block type quay walls.
