Time-varying Reliability Analysis of Long-span Continuous Rigid Frame bridge under Cantilever Construction Stage based on the Monitored Strain Data

In general,the material properties,loads,resistance of the prestressed concrete continuous rigid frame bridge in different construction stages are time-varying.So,it is essential to monitor the internal force state when the bridge is in construction.Among them,how to assess the safety is one of the challenges.As the continuous monitoring over a long-term period can increase the reliability of the assessment,so,based on a large number of monitored strain data collected from the structural health monitoring system(SHMS)during construction,a calculation method of the punctiform time-varying reliability is proposed in this paper to evaluate the stress state of this type bridge in cantilever construction stage by using the basic reliability theory.At the same time,the optimal stress distribution function in the bridge mid-span base plate is determined when the bridge is closed.This method can provide basis and direction for the internal force control of this type bridge in construction process.So,it can reduce the bridge safety and quality accidents in construction stages.

Cost Management Strategy of Highway Engineering Construction Stage Using the List Pricing Model

Highway engineering requires higher investment and requires a long time of management compared to other construction projects.There are many factors that affect the project cost during the engineering construction stage of a highway.The effective development of cost management in the construction phase of highway engineering under the list pricing model can avoid unnecessary waste and help control the cost of highway engineering.However,there are still some problems in the development of cost management in the construction phase of highway engineering,which will affect the role of the list-based pricing mode in cost management.This paper explores and analyzes the advantages of the list pricing model and the problems existing in the cost management of the highway engineering construction stage under the list pricing model,and proposes effective management strategies to improve cost management of the highway engineering construction stage.

Numerical Staged Construction Analysis of Precast Concrete Bridge

The paper discussed about the staged construction analysis of two-span precast-girder bridge considering time dependent effects, namely creep and aging of concrete. Results obtained showed that it is very important to consider construction stage in the analysis of bridge because of stress resultants which are important in design process and very different from those obtained without the consideration of construction stage. This fact is especially important for bridges, because construction period continues along time and loads may change during the construction period and after.

Decisive Stage of All-round Construction of Well-off Society Is a New Opportunity for China's Human Rights Cause

The p eriod of"The 13th Five-Year Plan"for national socioeconomic development(2016-2020)is a decisive stage of completion of all-round construction of a moderately prosperous society in China,and the year of 2016 is the first annum of this decisive stage.The Central Committee of the Communist Party of China(CPC)headed by General Secretary Xi Jinping has,with a new stance and new ideas,set strategic tasks

Control and Management of Construction Project Cost

Project cost can control the input in construction project and improve economic benefits of construction enterprises,so it is an important section of construction engineering.Reasonable control and management of project cost is the principle that building units must obey in the whole process of project,particularly in the construction stage,so it is extremely important to control and manage the project cost.This paper first analyzed possible causes for the unreasonable cost of construction projects,and put forward pertinent strategies for the control and management of construction project cost.

Research on Influencing Factors of Reservoir Construction Risk Based on Interpretative Structural Modeling

Reservoir plays an important role in the allocation and rational use of water resources, especially water resources in China are centrally distributed in the western region, and large reservoirs should be built to meet the people’s livelihood needs of each region. The construction of large reservoirs has numerous risks, the clarity of these risks helps us to better plan and make decisions before implementing the project. Search through literature reading and professional information, determined 11 risk factors in the construction phase of the reservoir construction project case, construct a risk influencing factor system under the application of ISM (Interpretative Structural Modeling). Studies have shown that the risks of strategic guidelines and policies and changes in infrastructure planning have the deepest impact on construction risk management. Among them, the strategic policy risk is the root impact, and the impact of the infrastructure planning change risk has a far-reaching impact. Through the above conclusions, providing management countermeasures and suggestions for the risk control of reservoir construction.

Deformation Analysis Due to Early Loading of Concrete Buildings

The building industry has experienced in recent years a strong growth in demand in general and in the case of reinforced concrete buildings this increase has been more marked. This fact has also contributed to accelerate all stages of the production process of these constructions with more pronounced effects on the methodologies used in the constructive steps that influence directly the structural design of the building. Structures loaded at ever earlier ages, in which the strength and deformation properties of materials are not yet sufficiently mature. It is a variable that needs to be taken into account already in the design phase so that the concrete structure behaves within acceptable level of reliability taking into account design code recommendations for service life. To understand the importance of constructive effects and to assess its magnitude in the execution of reinforced concrete buildings, this paper presents result from nonlinear analyses using finite element method adopting an approach commonly referred as staged construction applied to a typical building found in the practice. The effects of creep and shrinkage were considered and the results obtained demonstrate that the strains due to constructive effects can, in certain cases, assume representative values which, if ignored, can lead to important pathologies in the building.

Qinghai's 100 Billion Yuan Lithium Industry Construction Enters a New Stage

As one of the important projects for the development of lithium industry and the construction of the 100 billion yuan lithium industry base in Qinghai Province,BYD lithium industry project has started construction in Xining,Haidong and Haixi.The starting of equipment commissioning,plant construction and making technology reach the standard indicates that Qinghai’s 100 billion yuan lithium industry construction has entered a new stage of vigorous development.