Professor Dr. Fauziah Ahmad
School of Civil Engineering, Universiti Sains Malaysia, Malaysia
Title: Slope Failure, Erosion and Flood Due to Effect of Climate Change in Penang Island
The monsoon season for the few year has an impact to Penang Isaland tremendously and in the recent events in month of November till December in 2017 has left Penang Island in devastated conditions where, hill slope landslide, erosion and flood took place around Penang. This has affected many areas in Penang Island and Universiti Sains Malaysia student accommodation area near the hillside affected due to heavy rainfall and stormy weather. This was a monsoon season, however these occurrences were not normal and Penang has accounted many slope failure, building construction collapse and flash floods. A series of failure occurred at the surrounding slope at USM has occurred over the past 10 years and therefore remedial work were carry out to improve the slope on site. During the seasonal rainfalls the slope was heavily eroded and all the trees and grouted slope which was in placed before, fail to sustain from the water movement. Then a series of Soil Resistivity test on site was then explored to foresee the major problems and to counter the stability. By doing this investigation, the purpose is to understand, analyse and rectify the situation of slope failure. From this study, we have conducted the soil mapping of the ground to further understand the soil condition so that all the counter measures can be done effectively. The rectified was done as an emergency condition and was prepared immediately; therefore, soil nailing and grouting method were proposed along with different counter measure to stabilized the slope. The stabilization of the slope was done under three weeks and the monitoring was done to measure the ground water level conditions and inclination of ground movement after constructions. From the study it shows that after rectification and placing the right infrastructure to the slope, the system in place are now stabilized and able to cater heavy downpour after completion.
Oral Presentation
Shiyu Tong, Shenyang Agricultural University, China
童诗雨 沈阳农业大学
Title: Research Progress of Steel Tube Rubber Concrete
Abstract: As a new form of concrete- filled steel tube, this paper focuses on the experimental research of the axial pressure performance of steel tube rubber concrete members in recent years, and explains and summarizes the related research results of hysteretic performance and seismic performance, and needs further work. The possibility and development trend of its application in practical engineering was discussed.
Yanwei Cui, Beijing University of Technology, China
崔燕伟 北京工业大学
Title: The research on seismic design method of a beam-column joint in reinforced concrete space frame
Abstract: Earthquake action is multi-dimensional and random. The anti-seismic capability of beam-column joints in reinforced concrete (RC) frame structures under bidirectional horizontal direction loading may be lower than the design capability for unidirectional earthquake actions. To date, detailed calculation methods for the shear capability and shearing performance of joints in RC frames under bidirectional horizontal direction loading have not been reported. Therefore, in this work, the shear mechanism and internal force calculation method of beam-column joints in an RC space frame under bidirectional horizontal direction loading are analyzed. Furthermore, a shear capacity calculation model is established based on the strut-and-tie model. The predicted values of the shear capability in this work are in good agreement with the reported experimental results. This study provides a design method for the seismic design of RC space frame joints, and provides a supplement for the seismic design method of RC space frame with "strong joints and weak members", when they are subjected to bidirectional horizontal direction loading at the same time.
Luming Yang, Fujian University of Technology, China
杨鹿鸣 福建工程学院
Title: Analysis of Deformation of Ground and Connected Aisle with the Influence of Sump-Pit Excavation in the Aisle
The excavation of connected aisle is one of the key risks for the construction of subway in the coastal soft clay layer. The excavation of sump-pit will adversely affect the deformation of the ground and connected aisle, increase the risk of the project. The finite element software ABAQUS is used to carry out numerical simulation research on the excavation of sump-pit. The influence of deformation of ground and connected aisle were analyzed by the method of changing the position of sump-pit excavation. The result showed that: the most significant influence of sump-pit excavation was crown settlement, the second important influence was ground settlement, and the influence of headroom convergence was slight. The maximum ground settlement increased by 7% and the maximum crown settlement by 13% if the sump-pit was built in the middle of connected aisle.
Yunchen Wang, Fujian University of Technology, China
王蕴晨 福建工程学院
Title: Study on the Mechanical Properties of Large Rectangular and Shallow Embedded Pipe-Jacking During Pushing-Process
With the continuous increase of urban population, the development degree of urban underground space is increasing, and the pipe jacking method has been widely used in the construction of urban underground space. This paper analyzes the disturbance mechanism of the pipe jacking construction on the surrounding soil, and analyzes the actual results of the surface subsidence in the rectangular pipe jacking project of Baima Road in Fuzhou Baolong Wanxiang Square and the civil defence project. By combining the three-dimensional finite element model, the law of ground surface settlement and deformation during the construction of shallow-buried large-section pipe jacking under the conditions of coastal stratum is studied. And through the on-site monitoring settlement data of the project and the finite element simulation, the ground surface subsidence deformation law and the pipe-tube stress variation law of the shallow-buried large-section pipe jacking under the coastal stratum are mastered, which can be used for the design and construction of related similar projects for reference in the future.
Haikang Chen, East China University of Technology, China
陈海康 东华理工大学
Title: Experimental Study on Influence of Roughness on Shear Characteristics of Interface between Nanchang Brown-red Silty Clay and Pile
Structural surface roughness is an important factor affecting the strength and deformation characteristics of soil-joint interface. Four kinds of surface roughness structural planes were made by using epoxy resin cementing agent and quartz sand with different particle sizes with surface roughness tester. Using the improved shear apparatus, the shear tests of six different normal stresses in the range of 30-300 kPa on four different roughness soil-junction interfaces were carried out. The experimental data show that with the increase of the roughness of the structural surface and the normal stress acting on it，the peak shear stress and residual shear stress of the silty clay-bond interface increase .The strain softening characteristics of the interface gradually weaken and develop towards strain hardening during the shear process. The shear displacement required to reach the peak shear stress increases, and the initial and generalized viscous of the interface increase, but the initial and generalized friction angles do not change significantly.
