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Static behavior of semi-rigid thin-walled steel-concrete composite beam-to-column joints with bolted partial-depth flush end plate:experimental study

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Journal of Harbin Institute of Technology(New Series) 2011年第5期18卷 91-102页

作者：郜京峰张耀春王海明姚淇誉金路 School of Civil Engineering Harbin Institute of Technology China Electronics Engineering Design Institute Beijing Institute of Architectural Design

A new type of semi-rigid thin-walled steel-concrete composite beam-to-column joint has been proposed in this *** semi-rigid composite beam-to-column joint specimens subjected to hogging moments under monotonic loading were tested to study the static behavior of this new type of *** main variable parameters for the five joint specimens were the longitudinal reinforcement ratio and the joint *** experimental results designated that the magnitude of extension of the longitudinal reinforcement is the most important factor that influenced the moment-rotation characteristic of the new type of *** concrete slabs could resist 3.8%-19.1% of the total shear load applied to the cross-sections near the beam-to-column *** edge stiffened elements,such as the flange of the lipped I-section thin-walled steel beam,were capable of having considerable inelastic deformation capacity although they had comparatively large width-to-thickness *** shear failure of the concrete cantilever edge strip must be taken into account in practical design because it has significant influence on the anchorage of the longitudinal reinforcement in the new type of external joints.

关键词： semi-rigid thin-walled steel-concrete composite structures beam-to-column joints static behavior experimental study

Performance study on T-stub connected semi-rigid joint between rectangular tubular columns and H-shaped steel beams

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Frontiers of Structural and Civil Engineering 2013年第3期7卷 296-303页

作者： Guochang LI Hongping YU Chen FANG School of Civil Engineering Shenyang Jianzhu UniversityShenyang 110168China

This paper investigates the performance of T-stub connected semi-rigid joint of rectangular tubular columns and H-shaped steel *** finite element analysis software ABAQUS is used to analyze the nonlinear performance of the joint under monotonic ***,the dimensions of T-stub,column and beam are considered as analytic parameters to discuss the performance of the *** analysis shows that the thickness and the length of T-stub webs,the height of beam section,bolt diameter,shear connector and the preloaded force affect the performance of the joint largely,and the thickness of the steel tube,the thickness and length of T-stub flange,bolt spacing have relatively little influences on the performance of the *** research results indicate that this joint is semi-rigid joint.

关键词： rectangular tubular columns T-stub semi-rigid nonlinear finite element analysis moment-rotation curves

Simplified Beam Design for semi-rigid Composite Frames at the Serviceability Limit State

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Tsinghua Science and Technology 2008年第5期13卷 681-688页

作者：王静峰李国强 School of Civil Engineering Tsinghua University School of Civil Engineering Tongji University

This paper presents a simplified beam design method for semi-rigid composite frames with vertical loading at the serviceability limit state. Equations were developed to determine the deflections of the composite beam allowing for both joint flexibility and beam sectional properties, along with a formula for the connection secant stiffness. The equations for the connection stiffness are more accurate than previous equations used because it considers the beam-to-column stiffness ratio and the beam-to-connection stiffness ratio. The equations were validated by the experimental results for two semi-rigid composite frames. The equations agree well with the experimental data because they take into account the actual beam-to-column connections and the composite action between the steel beam and the concrete slab.

关键词： semi-rigid composite frame composite action deflection connection stiffness serviceability

Use of a modified ureteral access sheath in semi-rigid ureteroscopy to treat large upper ureteral stones is associated with high stone free rates

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Asian Journal of Urology 2019年第3期6卷 217-221页

作者： Jad Khaled AlSmadi Xiaohang Li Guohua Zeng Department of Urology Minimally Invasive Surgery Centerthe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina Guangdong Key Laboratory of Urology GuangzhouChina

Objective:To examine differences in outcomes of semi-rigid ureteroscopy(URS)with or without a modified-ureteral-access-sheath(mUAS)to treat large upper ureteral ***:Patients with single,radio-opaque large upper ureteral stone(≥10 mm)treated using semi-rigid URS between August 2013 and October 2016 were retrospectively *** stone-free status was determined from Kidney-ureter-bladder(KUB)X-ray films taken on postoperative Day 1 and after 1 ***:Of 103 patients meeting inclusion criteria,43(41.75%)and 60(58.25%)were treated with semi-rigid URS with and without mUAS,*** immediate stone-free rate(SFR)for the mUAS group was significantly higher than the non-mUAS group(40[93.0%]vs.46[76.7%];p=0.033).The SFR at 1 month was also high for patients treated using mUAS,but not statistically different from patients not treated with mUAS(41[95.3%]mUAS vs.51[85.0%]non-mUAS;p=0.115).Auxiliary procedure rates were significantly lower for mUAS patients compared to non-mUAS patients(2[4.7%]vs.14[23.3%];p=0.01).There were no significant differences in surgical duration and hospital stays,and the overall complication rates were statistically similar for mUAS patients compared to non-mUAS patients(1[2.3%]vs.3[5.0%];p=0.638).

关键词： Ureteroscopy semi-rigid Large ureteral stones Ureteral access sheath Modified ureteral access sheath

semi-rigid Registration of 3D Points

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Journal of Signal and Information Processing 2013年第3期4卷 25-29页

作者： Baowei Lin Kouhei Sakai Toru Tamaki Bisser Raytchev Kazufumi Kaneda Koji Ichii Graduate School of Engineering Hiroshima University Higashi-Hiroshima Japan.

In this paper, we proposed a method for semi-rigid changed 3D point clouds registration. We first segment the point clouds into individual segments and then the alignment energy costs of each segment are calculated. The rough initial transformation is estimated by minimizing the energy cost using integer programming. The final registration results are obtained by rigid alignments of separated corresponded segments. Experimental result with simulated point clouds demonstrate that the concept of semi-rigid registration works well.

关键词： semi-rigid Registration Segmentation Integer Programming rigid Alignment Energy Minimization

A Novel semi-rigid Nephroscope Percutaneous Nephrolithotomy： The Best Therapy for Renal Staghorn Calculi

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Chinese Medical Journal 2015年第22期128卷 3109-3111页

作者： Bo Xiao Song Chen Xin Zhang Wei-Guo Hu Yu-Bao Liu Yu-Zhe Tang Jian-Xing Li Department of Urology Beijing Tsinghua Changgung Hospital Medical Center Tsinghua University Beijing 102218 China

Percutaneous nephrolithotomy （PCNL） has been the first-line treatment for renal staghorn calculi for many years. Several techniques have been described for percutaneous access and stone removal, but a multi-access approach is the mainstay of treatment. The main concern about PCNL is the resultant morbidity： Complications such as bleeding, parenchymal damage, and organ injury hindered the adoption of PCNL in primary hospitals in China.

关键词： Kidney Percutaneous Nephrolithotomy semi-rigid Staghorn

Study on Test Methods for Mechanical Properties of semi-rigid Base Cores of In-service Pavements

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Journal of Civil Engineering and Architecture 2018年第2期12卷 97-105页

作者： Song Bo Zhang Jin-xi Xue Zhong-jun Zhou Xu-li Zhang Tao School of Metropolitan Transportation Beijing University of TechnologyBeijing 100124China Beijing Board Engineering Quality Supervision Station Beijing 100076China

Compressive strength and compressive resilience modulus are two important parameters to measure the mechanical properties of semi-rigid *** test methods of semi-rigid base cores are different from those of the laboratory samples in terms of sample acquisition,sample selection and humidity ***-drilling location,size of core sample,smoothness and humidity conditions were *** test methods of compressive strength and compressive resilience modulus were *** research results show that compressive strength of lime fly-ash stabilized gravels base has a tendency of increasing during a long *** compressive resilience modulus increases significantly with compressive strength of semi-rigid *** compressive resilience modulus generally is 3-4 times than the recommended range of asphalt pavement design *** fluctuation range of compressive resilience modulus is obviously higher than the compressive *** compressive resilience modulus is more sensitive to the construction *** overall trend between the compressive resilience modulus and the back-calculation modulus is ***(falling weight deflectometer)back-calculation modulus can reflect the stiffness and bearing capacity of asphalt pavement.

关键词： Road engineering semi-rigid base cores compressive strength compressive resilience modulus test methods

Infrapubic versus Penoscrotal Approaches for Implantation of semi-rigid Penile Prosthesis

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Open Journal of Urology 2017年第9期7卷 146-158页

作者： Salah E. Shebl Saadeddin Ali Urology Department Faculty of Medicine for Girls Al-Azhar University Cairo Egypt Andrology and Dermatology Department Faculty of Medicine Al-Azhar University Cairo Egypt

Background: Modification of surgical techniques to minimize wound infections in penile implant surgery using malleable prosthesis which is easy to use, of very low risk of mechanical failure and is financially suitable to improve outcome and ensures less complications. The aim of the study is to compare infrapubic approach and Penoscrotal approach in penile semi-rigid prosthesis implantation surgery. Patients and methods: Fifty patients were randomly divided into two groups and each group underwent one approach. Results: No statically significant differences were found between both groups in terms of operative time. Corporeal cross over was the most common intraoperative complications, 3 cases in IP approach and 6 cases in PS but not statistically significant. Peyronie’s disease patients underwent penile implant through infrapubic approach in 3 cases and PS in 4 cases with one recorded complication of keloid formations with IP. Urethral false passage reported only in one case with PS approach without affecting the procedure. Only minor complications including superficial wound infection which was significantly more with PS, 6/25 (24%) and IP 1/25 (4%), p value = 0.041. Penile and scrotal edema was common with IP approach (92%) in comparison with PS approach (60%). The urethral catheter can be abandoned with IP to avoid the risk of catheterizations. No significant relation between diabetes and infections and no erosions were encountered. Conclusion: Through this research work, infrapubic approach is better than Penoscrotal approach even if it is not commonly used by surgeon.

关键词： Infrapubic semi-rigid Erectile Dysfunction Penile Prosthesis Malleable Implant

semirigid Analysis of Extended End Plate Connections Based on Correlation and Sensitivity

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Journal of Shanghai Jiaotong university(Science) 2012年第5期17卷 598-604页

作者：潘建荣王湛郑霖强林梓兴何一鸣朱庆玲 State Key Laboratory of Subtropical Building Science South China University of Technology

Traditionally,semi-rigid analysis of extended end plate connections is assumed to be deterministic *** of the moment-rotation models of the joint are determined by curve-fitting and statistically regressed with the test *** of these models have little physical meaning,and the effect of correlations in the parameters is *** paper deals with a semi-rigid joint of extended end plate connections based on correlation and sensitivity analysis.A numerical study was carried out and the finite element analysis was validated compared with the experimental *** relative moment-rotation model was concluded based on correlations in parameters and probabilistic sentivity *** relationship between height and width of steel beam was partial *** relationship between thickness of steel beam flange and thickness of steel beam web was also partial *** and width of steel beam,and distance of upper bolts to axle wire of steel beam section were important sensitive parameters for the extended end plate connections.

关键词： semi-rigid extended end plate correlation sensitive parameter