One widely accepted strategy is to add fiber into recycled aggregate concrete (RAC) improve compressive strength. Few existing investigations have focused on the cyclic behavior of hybrid reinforced (HFRRAC). A total eighteen groups prismatic specimens with different combinations and coarse (RCA) replacement rates were conducted under compression investigate mechanical properties hooked-end steel macro-polypropylene concrete. Results indicate that loading fail similarly those subjected...

The corner element is the most basic constitutive of multi-cellular thin-walled structures; however, scenarios for using relevant theories are limited. To improve this situation, research investigated effect boundary conditions on compression performance elements with different angles. deformation laws were also explored. approach was based experiments and finite method. result shows outwardly extending plates both sides yield first, central twisted wire region then destabilizes exits...

Abstract Strain distribution measurements and problematic crack detection are important issues in the damage performance evaluation of concrete, or reinforced structures. In recent years, Brillouin Optical Time Domain Reflectometry (BOTDR) based optical fibre sensing technique has attracted great attention as a distributed monitoring method. Current BOTDR instruments suitable for strain over certain distance (termed spatial resolution), but such cracks concrete structures local. It is...

The digital image correlation method (DICM) has been applied to similar material simulation experiments for rock‐like materials, overcome the weakness of traditional measurements, example, data discontinuous. In this paper, movement and fracturing process overlying strata during excavation are observed studied, distributions stress, strain, deformation in obtained based on simulation. DICM is improve testing optimize discontinuity points; course, difference rock considered. Full‐field strain...

In order to limit the disengaging of short square concrete‐filled steel tube (CFST) columns and strengthen combined action tubes concrete, a reinforcing method stiffener is put forward in this paper. The axial compression performance mechanism are studied through experiments, which indicate that (1) buckling model stiffening members changes into double wave, (2) stiffeners enforce constraint core (3) can effectively improve ultimate bearing capacity, (4) increase stress middle distribution...

Axial compression tests were conducted on short rhombic tubes of different cross-sectional shapes. The deformation modes the obtained. To induce a finite element model with consistent actual working conditions, buckling are introduced into as initial imperfections structure. However, resulting from analyses often do not meet needs crushing modes. A coefficient superposition method solution is proposed to derive modal characteristics by linear Through study three aspects theory, test, and...

In this paper, under the condition of bidirectional stress, buckling deformation side plate in a rectangular concrete-filled steel tube (CFST) column has been studied detail. We have conducted theocratical analysis, an experimental validation and finite element simulation to investigate influences height-width ratios Nominal Poisson’s on form plate, we also try explain change between unidirectional both them can provide good reference basis for design application CFST column. The specific...

The slender structure is prone to be affected by horizontal force; therefore, the seismic performance needs considered carefully. Meanwhile, due low cost and good on resistance of Tuned liquid dampers (TLDs) system, it has been widely used for vibration control. Regarding abovementioned background, in this study, we conduct experiment investigate with integral water tank, two designed parameters (the placement location level tank) are studied. experimental phenomenon structural accelerations...

体内外药效物质组生 物/化学集成表征 [3] 、谱效整合指纹谱 [4] 及中药代谢产 物成分追踪 [5] 等均已有较成熟的应用, 部分中药复方 及单味中药有效成分已有较明确的研究.中药复方 的配伍是中医药理论的精华之一, 单味中药经配伍 后可以达到减毒、增效的效果.因此, 中药配伍法则 对中药复方的现代研究和开发具有重要的指导意义. 然而, 中药复方成分复杂、 生物利用率低、 水溶性差、 毒副作用较大等问题是中药新药开发的难点. 传统 的中药物质基础研究手段可初步阐明中药发挥疗效 的过程及原理, 却不足以充分挖掘中药配伍中的宝 贵财富, 进一步研发出成分明确、质量可控、疗效显 著、用药安全的创新药物.结构拼合原理(combination principles)构想发源 于 19 世纪, 随着药物化学和临床医学的发展, 已广 泛应用于新药及中药先导化合物开发研究中

Stress analysis is of importance for security assessment pressure vessels in the design and manufacture processes. This paper presents a stress two-layered spherical high-pressure vessel special steel. Firstly, finite element model was built by software ANSYS. In order to get an acceptable precision, proper mesh density distribution obtained adaptive meshing technique. Then performed potential weak zones explosion were found. Furthermore, several redesign schemes analyzed. The results...

Recently, the light-type pier can be easily observed in urban elevated roads and bridge structures. This type of is broadly used field structural engineering. The Thin-Walled Steel-Reinforced Concrete Pier (TSRCP), as typical piers, shows a better mechanical performance than conventional reinforced concrete due to enhancement H-shape steel. In terms TSRCP, designed parameters, including depth–width ratio (DWR) axial compression (ACR), have been determined this study concerned variables....