Experimental Research And Finite-element Analysis On Seismic Performance Of The Analysis On Seismic Rerformance Of The Compostite Wallboard Made Of Gypsum Board And Concrete

Researching and developing new types of environment-friendly construction materials as well as promoting environment-friendly material walling buildings is the developing trend of China housing industry. Gypsum speed-up wallboard that is one of the environment-friendly construction materials, firstly produced and designed in Australia,has many advantages in construction structures. Recent years, the related technology is introduced to our country and developed in certain degree. FuLin Developing Corporation, located in Tianjin Development Zone, has developed and produced the polystyrene composite panel that is a kind of external thermal insulation gypsum which combines waterproof glass fiber gypsum board and polystyrene board thermal insulation material together. The panel is made into wallboard production in the factory. According to the design requirements, the wallboards are cut into satisfying wallboard and then transported to the construction site to install. The wallboard with cavities can be the bilateral permanent stay-in-place formwork on both sides of the cast-in-place reinforced concrete wall. Which forms a new type of composite reinforced concrete-gypsum wallboard that has external thermal insulation property. This type of wall is a new environmental-friendly construction wall including bearing, thermal retardation and thermal insulation. The wall can replace the traditional load-bearing sheer wall and has great development prospect. The present study on the structural performance is still in the primary stage of development. In order to find out seismic performance of the new type of composite concrete-gypsum wallboard, the low cyclic loading seismic performance experiment and numerical analysis of finite element on it have important significance in engineering practice.This paper carries out low cyclic experiment research and numerical simulation, based on the two 3-story residential test buildings made of new type of composite concrete gypsum wallboard by FuLin Developing Corporation. The research achievement and innovation of this experiment is mainly manifested in the following aspects:1. This paper focus on designing three L shaped joint specimens of the new type of composite concrete-gypsum wallboard. We realize the failure process and patterns, stress characteristic, deformation capacity and so on of the L shaped joint specimens under the fixed axis pressure and the low cyclic loading test.2. Through the relevant data of the test, we investigate the cracking load, yield load,yield displacement,ultimate load and limit displacement of the L shaped joint specimens of the new type of composite concrete-gypsum wallboard under the fixed axis pressure and the low cyclic loading, and through the ductility, stiffness degradation, hysteretic behavior and energy dissipation behavior of the L shaped joint specimens, we study its joint seismic performance. The conclusion of the experiments is: L shaped joint under the function of this load is relatively not easy to damage. In other words, it has a certain degree of safety.3. We carry out nonlinear finite element analysis of the L shaped joint specimens of the new type of composite concrete-gypsum wallboard by using the finite element analysis software-ABAQUS. Compared with the low cyclic loading test results, they are approximately in agreement. The results above provide the reference for simulating the low cyclic loading experiment of the new type of composite concrete-gypsum wallboard of other specifications using computer software.