The highly industrialized composite concrete structure system is easy to achieve the objectives of standardized design, component industrialized production, precast construction and information management, especially in the aspects of precast component standardization, factory automation and on-site highly precast construction, which is in line with the current national policies and needs to vigorously develop green buildings and precast buildings.

The standard preparation invites the technical specification for cast laminated concrete structures and the technical specification for cast laminated concrete structures of China Engineering Construction Standardization Association to officially start the preparation.

Please contact the Standard Institute of the editor in chief before January 15, 2022.

The on-site quality control is similar to that of cast-in-situ structure, which greatly reduces the difficulty of on-site construction of reinforcement connection and is conducive to controlling the construction quality of reinforcement connection, The safety of the composite concrete structure is ensured.

The first working meeting of the preparation group forms a standard comment draft in May 2022, solicits comments in June 2022, forms a standard submission draft in July 2022, holds a standard review meeting in August 2022, forms a standard submission draft in October 2022 and applies for approval.

The connection can be realized at the same time of on-site post pouring concrete.

(hereinafter referred to as “Standards Institute”) takes the lead in formulating the standard technical specification for precast laminated concrete structures of China Engineering Construction Standardization Association.

3.

The Institute of standards has been committed to the R & D and engineering application of laminated concrete structures and has achieved rich research results.

The Institute of standards has carried out a lot of work in the basic scientific research, technical research and development, standard preparation and engineering practice of precast concrete structures, and presided over the preparation of technical standards for precast concrete buildings (GB / t51231-2016), technical specifications for precast concrete structures (jgj1-2014), technical standards for the application of precast concrete external wall panels (JGJ / t458-2018) and other national Industry and group standards.

In order to ensure that the standard is more practical and standardized, It has wide applicability and representativeness.

The relevant matters are described as follows: 1.

It has gradually become the mainstream technology system for the application of precast building engineering in China.

14) issued by China Engineering Construction Standardization Association, China Construction standards design and Research Institute Co., Ltd.

Practical engineering experience shows that the processing cost of precast components of composite concrete structure is significantly lower than that of fully precast concrete structure.

It meets the actual needs of the current project.

4.

In recent years, it has been widely used and developed all over the country, and reflects significant technical and economic advantages.

The component processing is simple and highly standardized.

Lifting Socket

Generally speaking, laminated concrete structure has the advantages of simple and efficient processing and construction, easy quality control, low cost and little difficulty in management and control.

The precast construction engineering technology research institute of Standards Institute is responsible for the specific preparation and organization of this standard.

Compared with the traditional fully precast concrete structure system, the composite concrete structure system has the following advantages: 1 The vertical reinforcement of precast vertical members of composite concrete structure system with simple reinforcement connection and controllable quality mainly adopts traditional mechanical connection or lap connection.

This standard systematically optimizes and improves the existing “equivalent cast-in-situ structure” laminated concrete structure technical system based on the scientific research achievements and engineering practice experience of the Institute of standards and relevant units in the industry, including “precast hollow laminated shear wall structure”, “double-sided laminated shear wall structure”, “laminated concrete frame structure” and other technical systems, It can improve the quality, increase efficiency and reduce cost of precast concrete structure, provide theoretical support and standard basis for solving the application pain points of precast concrete structure, and lead the development direction of precast concrete construction technology.

See the following annex for the preparation invitation letter.

III.

Overview of standard preparation according to the notice on printing and distributing the formulation and revision plan of the first batch of association standards in 2020 (JB Xie Zi [2020] No.

In order to ensure that the standard is more practical, standardized, widely applicable and representative, representative backbone units in the industry are sincerely invited to join the preparation team to participate in the standard preparation.

The precast component processing mold is easy to realize standardization, generalization, high degree of automation, and the processed components have high precision and controllable quality.

standard preparation Outline 1 General 2 Terms and symbols 3 Basic provisions 4 Materials 5 Architectural design 6 Basic provisions for structural design 7 Precast hollow composite shear wall structure 8 Double sided laminated shear wall structure 9 Composite concrete frame structure 10 Component production and transportation 11 Construction and installation 12 The fourth standard preparation plan for quality acceptance is officially launched in January 2022.

Representative backbone units in the industry are sincerely invited to join the preparation team to participate in the preparation of this standard.

The contact information is as follows: Contact: Han Wenlong mobile phone: 18911026883 (wechat same number) email: hanwenlong9122@163.com 。.

Introduction to standard technology this standard is prepared by integrating a variety of technical systems of precast laminated concrete structures.

The precast components of the superimposed concrete structure system have less reinforcement and high degree of standardization.

Good structural integrity.

The seismic performance tests of composite precast members carried out at home and abroad show that the composite precast members can basically achieve the goal of equivalent cast-in-place in terms of bearing capacity, hysteretic performance and variability capacity.

The precast components of the composite concrete structural system are connected as a whole through post cast concrete, and the structural integrity is good.

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II.