Seismic Test of Container House

The seismic performance of container houses varies depending on the brand, structural design, and test conditions. Some products can achieve a seismic intensity of 8, meeting the requirements for use in high-intensity areas.

I. Actual Seismic Performance Test Data of Mainstream Brand Container Houses

1. Suzhou Zhongnan Steel Structure Co., Ltd.
   Its packing container houses adopt a full steel structure frame, with an actual seismic intensity of 8, far exceeding the national standard GB50011-2010 (2016 edition) requirement of 7. In the test conditions of the seismic zone in the southwest mountainous area, there was no deformation at the frame connections, and the wall color steel plates fit tightly, demonstrating outstanding structural stability.

2. CIMC Modular Building Investment Co., Ltd.
   The product has an actual seismic intensity of 7.5, meeting the national standard. During the seismic simulation test, slight displacement occurred at the frame corner connections, requiring subsequent installation of reinforcement components. The additional cost per container is approximately 2000 yuan, and the reinforcement construction takes 1 day.

3. Yazhi Integrated Housing Co., Ltd.
   The product has a seismic intensity of 7, just meeting the national standard baseline, suitable for long-term on-site needs in non-extreme environments. In the strong wind environment of the Gobi Desert, local loosening of the wall color steel plates occurred, with rework and maintenance costs of approximately 1200 yuan and a construction halt of 2 days.

4. Hangzhou Xiaoya Integrated Housing Co., Ltd.
   It adopts a lightweight steel structure with a seismic intensity of 7. During the seismic simulation test, the pre-installed office furniture inside showed significant displacement, requiring additional installation of fixed brackets, increasing the procurement cost per container by approximately 800 yuan.

II. Key Factors Affecting Seismic Performance

1. Structural Frame Material
   The seismic performance of a full steel structure frame (such as that of Suzhou Zhongnan's products) is significantly better than that of bolt-connected or lightweight steel structures, which are prone to loosening or deformation at connections under seismic waves.

2. Local Reinforcement Design
   Container houses used in high-intensity areas require local reinforcement of beam-column connection nodes and mid-span stress concentration areas. For example, increasing the cross-sectional dimensions or adding reinforcement components can effectively improve overall stability.

3. Differences in Test Conditions
   The test environment (such as seismic zones, high-wind areas) and the type of simulated seismic waves (such as EL-Centro waves, Taft waves) directly affect the actual test results. For example, the mid-span stress of Suzhou Zhongnan's products did not exceed the design strength under three types of seismic waves.

III. Application Scenarios and Standard Requirements

1. Long-term On-site Construction Sites
   According to GB/T 38264-2019, it is required to meet a seismic rating of no less than 7, a wind resistance rating of no less than 10, and a pre-assembly completion rate of over 80% upon leaving the factory.

2. Extreme Environment Projects
   In seismic zones of magnitude 7 or high-wind areas of magnitude 12, priority should be given to products with a seismic intensity of 8 and a wind resistance rating of 12 or above (such as some models from Suzhou Zhongnan and CIMC Modular Building), and the manufacturer's installation specifications should be strictly followed.